阅读说明：本技术 患者支撑装置 (Patient support device ) 是由 达雷尔·L·伯格曼 道格拉斯·伯格曼 阿皮特·沙 王会贤 基思·穆尔斯 杰森·M·吉里思 于 2019-02-27 设计创作，主要内容包括：本发明涉及患者支撑表面控制,寿命终止指示以及X射线暗盒套。一种患者支撑装置可以包括支撑表面,该支撑表面被构造成沿着支撑表面的顶面传导空气,以便将来自躺在支撑表面上的患者的热量和湿气从支撑表面的顶面上带走。开口可以形成在支持表面的侧面中。腔体可以从开口延伸至支撑表面内。入口端口可以安置在腔体内并且流体式连接到顶面。鼓风机组件可被构造成安置在腔体内。当鼓风机组件安置在腔体内时,鼓风机组件可具有连接到入口端口的出口端口。鼓风机组件可以将空气传导穿过入口端口导向支撑表面的顶面。(The invention relates to patient support surface control, end-of-life indication, and X-ray cassette enclosures. A patient support device may include a support surface configured to conduct air along a top surface of the support surface to carry heat and moisture from a patient lying on the support surface away from the top surface of the support surface. The opening may be formed in a side of the support surface. The cavity may extend from the opening into the support surface. An inlet port may be disposed within the cavity and fluidly connected to the top surface. The blower assembly may be configured to be disposed within the cavity. The blower assembly may have an outlet port connected to the inlet port when the blower assembly is disposed within the cavity. The blower assembly can direct air through the inlet port toward the top surface of the support surface.)

1. A patient support device comprising:

a support surface having a head end and a foot end, the support surface having a top surface at a first height, the top surface extending from the head end to the foot end, an

A heel suspension mechanism built into the foot end of the support surface, the heel suspension mechanism configured to change a height of the top surface at the foot end of the support surface to a second height different from the first height.

2. The patient support device of claim 1, wherein the heel suspension mechanism comprises:

a plate disposed below the foot end of the support surface, the plate including at least one groove,

a pull rod disposed within the groove and having a cam attached thereto, an

A handle extending from the pull rod for rotating the pull rod,

the pull rod is rotatable between a lowered position in which the cam maintains the top surface of the foot end at a first height and a raised position in which the cam raises the top surface of the foot end to a second height.

3. The patient support device of claim 2, wherein the plate includes a plurality of grooves between which the pull rod is movable to adjust the cam-actuated foot end portion.

4. The patient support device of claim 1, wherein the heel suspension mechanism comprises a bladder disposed within a foot end of the support surface to change a height of a top surface of the foot end.

5. The patient support device of claim 4, wherein the bladder is at least one of inflated and deflated by a manual pump and inflated and deflated by a pump of a microclimate system.

6. The patient support device of claim 1, wherein the heel suspension mechanism comprises a foam wedge connected to the foot end and movable to change a height of a top surface of the foot end.

7. The patient support device of claim 6, wherein the foam wedge is at least one of rotated relative to the foot end to position the foam wedge at the second height and translated along the foot end to position the foam wedge at the second height.

8. The patient support device of claim 1, wherein the heel suspension mechanism comprises:

at least one cam located under the foot end, an

A diaphragm disposed between at least one cam and the foot end, the cam being rotatable to move the diaphragm, the diaphragm changing a height of a top surface of the foot end as the diaphragm moves.

9. The patient support device of claim 8, wherein the diaphragm includes a hinged plate, and when the cam rotates, the cam rotates the hinged plate.

10. The patient support device of claim 1, wherein the support surface comprises a base surface and the heel suspension mechanism comprises a top surface above the base surface at the foot end, the top surface configured to be rolled into a rolled configuration to change a height of a top surface of the foot end.

11. The patient support device of claim 1, wherein the heel suspension mechanism comprises a jack located below the foot end, the jack being actuatable to change a height of a top surface of the foot end.

12. The patient support apparatus of claim 11, wherein the jack is at least one of a hydraulic jack and a manually operated type.

13. The patient support device of claim 1, wherein the heel suspension mechanism comprises a telescoping member disposed below a foot end, wherein the telescoping member is adjustable to change a height of the top surface of the foot end.

14. The patient support apparatus of claim 13, wherein the telescoping member is at least one of hydraulic and manual.

Technical Field

The present disclosure relates to features of a controller and patient bed frame for patient beds commonly found in medical institutions such as hospitals and nursing homes. More particularly, the present disclosure relates to support surfaces with enhanced patient-caregiver interaction, such as controlling overall bed functions and patient treatment.

Background

The present disclosure also relates to a microclimate structure for a hospital bed, medical bed or other type of bed, wherein the microclimate structure is designed to cool and dry the skin of a patient around a targeted treatment area. In a care facility such as a hospital or nursing home, a patient is typically positioned on a patient support device for an extended period of time. Patients on a patient support device are often at risk of developing certain skin conditions, such as pressure sores (also known as pressure sores or decubitus ulcers), due to the hot and humid air along the interface of the patient and the mattress. To alleviate or prevent this, some mattresses have a built-in microclimate structure. The microclimate structure can conduct air along the interface of the patient with the surface to keep the patient's skin cool and dry. Some microclimate structures require a large volume of air to be provided to them in order to provide an effective amount of cooling and drying to the skin of a patient. Thus, some microclimate structures require a pneumatic cartridge that is fluidly connected to the microclimate structure and positioned within the patient room, thus occupying space within the patient room.

Typical powered air surface or microclimate configurations often rely on a separate pump and controller to provide wound therapy. Thus, the user must locate an available pump module within the medical facility to operate the structure. Furthermore, the loss of an individual pump in a healthcare facility can thereby reduce the number of available pumps in the facility and increase the difficulty of finding available pumps. Often, this results in a delay in providing treatment to the patient, and not all patients use the microclimate system. Furthermore, the hose attachments of typical pumps provide unreliable connections and can become dirty, thereby requiring cleaning of the hose and pump after each use. Uncleaning the hose and pump can lead to the spread of infection and other diseases.

The present disclosure also relates to monitoring use of a support surface of a patient support device and mitigating use of a degraded support surface. The support surface wears in response to patient loads applied to the support surface over time. The use of a support surface beyond its useful life may degrade the support surface and reduce the effectiveness of the support provided by the support surface to the patient supported thereby. Degradation of the support surface may increase the likelihood of skin breakdown and pressure ulcers caused by the support surface having reached the end of its useful life. Once the support surface has expired, it should be replaced to minimize the possibility of skin cracking and pressure ulcers. By doing so, the substantial costs associated with treating skin breakdown can be avoided, as well as injury caused by a patient resting on a support surface that is in use for more than its useful life.

In general, it is important to inform the caregiver that the support surface is near the end of its life in order to reduce safety hazards to the patient. The life of a support surface depends on several factors, including the time it is used, the number of cleaning and disinfecting times it undergoes, environmental conditions, and storage conditions. Additionally, if the first support surface is used for only 5,000 hours for a 100 pound patient and the second support surface is used for only 5,000 hours for a 500 pound patient, the performance of the first support surface and the performance of the second support surface will be quite different over time.

The present disclosure also relates to an X-ray sheath. Typically, the X-ray sheath is mounted on top. However, many support surfaces do not include a top and therefore cannot accept an X-ray sleeve. Moreover, many X-ray sleeves only allow access to the X-ray sleeve from one side of the support surface. Therefore, it may be difficult for the caregiver to mount the X-ray cassette. The housekeeping personnel may also need to stop using the support surface to clean the X-ray suite. Another disadvantage of current X-ray sheaths is that many X-ray sheaths are not fluid tight. As a result, fluids such as body fluids may contaminate the X-ray cassette or the interior surface components.

The present disclosure also relates to determining whether a patient has bottomed on a support surface. Bottoming occurs when the patient is constantly submerged in the support surface and is no longer supported by the support surface at the therapeutic pressure range, which can result in high interface pressures. Bottoming can reduce the effectiveness of the patient's treatment, can be uncomfortable for the patient, and/or can injure the patient, e.g., cause pressure ulcers, bruises, poor blood circulation, etc. Bottoming may occur with a support surface having an air bag when there is insufficient air in the air bag. If such bottoming is detected, it can be corrected by inflating the airbag. Bottoming can occur when the bladder wears and no more air can be retained. In support surfaces with foam, bottoming out may occur when the foam becomes worn and the support surface has reached the end of its life. Typically, bottoming is detected by a caregiver performing a "manual exam," in which the caregiver places his/her hands under the patient. However, manual examination is invasive and may be uncomfortable for the patient.

The present disclosure also relates to heel suspension in a patient support device. Often, the caregiver desires to be able to hang the patient's heel to ensure that new or worsening pressure sores do not occur on the foot. Often, the caregiver needs to hang the heel by creating an air gap between the support surface and the heel. This is typically accomplished by using a foam heel wedge that is placed on top of the support surface under the patient's lower leg. These accessories are separate from the bed and are often misaligned. In the event that the accessory cannot be positioned, the caregiver must use a towel and/or pillow to accomplish the same task.

The present disclosure also relates to determining when a mattress cover is soiled. There is currently no automated method for detecting the ingress of fluid into a mattress. Typically, hospital staff sometimes perform manual and visual inspections of the mattress core each year to determine if fluid ingress has occurred. In some cases, hospital staff may not be able to judge that the mattress cover has been damaged, thereby posing a significant risk of infection to the patient.

The present disclosure also relates to therapeutic mattresses. Typically, patient support devices in medical facilities include foam mattresses. However, in situations where the patient may be susceptible to pressure ulcers, the patient may be positioned on a mattress having an inflatable bladder. The balloon may be inflated or deflated depending on the comfort and condition of the patient. Typically, the type of patient support device is determined when the patient is admitted to the healthcare facility. Thus, if the patient is provided with a foam mattress and subsequently develops a pressure ulcer, the patient must be moved to a mattress having an inflatable bladder. Depending on the patient's condition, moving the patient to another support device may be dangerous and detrimental to the patient's overall health.

The present disclosure also relates to the development of air flow paths and pneumatic systems to generate sufficient air flow for microclimate management systems on medical mattresses. It may be desirable to direct the air flow to a particular body location on the medical mattress system. It may be desirable to control the airflow and detect any blockage of the intake and exhaust systems. Controlling the air flow and detecting blockages can reduce the potential safety hazard of mattress contamination due to fluid ingress.

Disclosure of Invention

The present disclosure includes one or more features recited in the appended claims and/or the following features, which either individually or in any combination, encompass the patentable subject matter.

In one aspect of the disclosed embodiment, a patient support device can include a support surface with a top. The top may be configured to conduct air along the top surface of the support surface to carry heat and moisture from a patient lying on the support surface away from the top surface of the support surface. An opening may be formed in a side of the support surface. The cavity may extend from the opening into the support surface. An inlet port may be disposed within the cavity and fluidly connected to the top. A pneumatic blower is removably disposed within the cavity. When the pneumatic blower is disposed within the cavity, the pneumatic blower may have an outlet port connected to the inlet port. The pneumatic blower may direct air through an inlet port to the top.

It is envisaged that the cavity is formed in a thigh section of the support surface. A controller is provided to control the flow of air from the air blower to the top. The support surface may include a plurality of bladders. Each of the plurality of bladders may be fluidly connected to a pneumatic blower. The controller may control the flow of air from the pneumatic blower to each of the plurality of bladders to inflate and deflate each of the plurality of bladders. Each of the plurality of bladders may be inflated or deflated to control the comfort level of the support surface. Each of the plurality of bladders may be inflated and deflated to control the pulsing of the support surface. The compression sleeve may be fluidly connected to a pneumatic blower. The controller may control the flow of air toward the compression sleeve. The support surface may be positioned on the bed frame. The controller may be connected to the bed frame. An electrical plug may extend from the pneumatic blower. The controller may be disposed on the electrical plug.

In some embodiments, the controller may be a patient pendant. The patient support may comprise a plurality of bladders. The patient pendant may control the intensity of the pulsations of the multiple bladders. The patient support may include a microclimate system with flow control. The patient pendant may control flow control of the microclimate system. The patient support may include a foot heater. The patient pendant may control the foot heater. The patient pendant may control one or more of a pulsating intensity of the support surface, a microclimate-managed flow rate of the top, and a foot heater disposed within a foot portion of the support surface. The patient pendant may control two or more of the pulsating intensity of the support surface, the microclimate-managed flow rate of the top, and a foot heater disposed within the foot portion of the support surface. The patient pendant may control each of the pulsating intensity of the support surface, the microclimate-managed flow rate of the top, and a foot heater disposed within the foot portion of the support surface.

Alternatively, the interface may be provided on the side of the support surface. The interface may include a dial to select a patient weight range. A plurality of bladders within the support surface may be inflated or deflated to adjust the support surface to the patient's weight range. The interface may also include an end-of-life indicator for monitoring the remaining life of the support surface. The end-of-life indicator may include a chemical strip that erodes or grows over time. The end-of-life indicator may include a timer for tracking how long the support surface has been used. The end-of-life indicator may include a timer for tracking the total time that the support surface has received power.

It may be desirable to position the end-of-life indicator within the support surface. The end-of-life indicator may monitor the remaining life of the support surface. The end-of-life indicator may include a transmitter to send a signal to the user interface indicating the remaining life of the support surface.

Alternatively or additionally, the support surface may comprise a lower enclosure connected to an upper enclosure by a first zipper. The X-ray cassette enclosure may have an opening sealed by a second zipper located between the first zipper and the top surface of the support surface. The second zipper may have a different appearance than the first zipper. The opening of the X-ray cassette enclosure may extend at least partially around both sides of the support surface and completely across the head end of the support surface. The top portion may extend over the upper enclosure. A fluid resistant material may be welded over the tear resistant material of the second zipper to fluidly seal the opening of the X-ray cassette enclosure.

In some embodiments, the sensor may be positioned below the support surface. The sensor may determine when the patient is within a predetermined range of the sensor. The indicator may provide an alert when the sensor determines that the patient is within a predetermined range of the sensor. The sensor may be disposed below the support surface. The conductive material may be disposed below the top portion. The sensor can determine when the conductive material is within a predetermined range of the sensor. The indicator may provide an alert when the sensor determines that the conductor is within a predetermined range of the sensor.

In another aspect of the disclosed embodiment, the patient support device can include a support surface with a top portion. The top may be configured to conduct air along the top surface of the support surface to carry heat and moisture from a patient lying on the support surface away from the top surface of the support surface. The inlet port may be disposed within the support surface and fluidly connected to the top. The pneumatic blower may be disposed within the support surface. The pneumatic blower may have an outlet port connected to the inlet port when the pneumatic blower is disposed within the support surface. The pneumatic blower may direct air through an inlet port to the top.

It is desirable to locate the air blower within the thigh section of the support surface. A controller is provided to control the flow of air from the air blower to the top. The support surface may include a plurality of bladders. Each of the plurality of bladders may be fluidly connected to a pneumatic blower. The controller may control the flow of gas from the pneumatic blower to each of the plurality of bladders to inflate and deflate each of the plurality of bladders. Each of the plurality of bladders may be inflated or deflated to control the comfort level of the support surface. Each of the plurality of bladders may be inflated and deflated to control the pulsing of the support surface. The compression sleeve may be fluidly connected to a pneumatic blower. The controller may control the flow of air toward the compression sleeve. The support surface may be positioned on the bed frame. The controller may be connected to the bed frame. An electrical plug may extend from the pneumatic blower. The controller may be disposed on the electrical plug. The controller may include a patient pendant. The patient pendant may control one or more of a pulsating intensity of the support surface, a microclimate-managed flow rate of the top, and a foot heater disposed within a foot portion of the support surface. The patient pendant may control two or more of the pulsating intensity of the support surface, the microclimate-managed flow rate of the top, and a foot heater disposed within the foot portion of the support surface. The patient pendant may control each of the pulsating intensity of the support surface, the microclimate-managed flow rate of the top, and a foot heater disposed within the foot portion of the support surface.

Alternatively or additionally, an interface may be provided on the side of the support surface. The interface may include a dial to select a patient weight range. A plurality of bladders within the support surface may be inflated or deflated to adjust the support surface to the patient's weight range. The interface may also include an end-of-life indicator for monitoring the remaining life of the support surface. The end-of-life indicator may include a chemical strip that erodes or grows over time. The end-of-life indicator may include a timer for tracking how long the support surface has been used. The end-of-life indicator may include a timer for tracking the total time that the support surface has received power. The end-of-life indicator may be disposed within the support surface. The end-of-life indicator may monitor the remaining life of the support surface. The end-of-life indicator may include a transmitter to send a signal to the user interface indicating the remaining life of the support surface.

In some embodiments, the support surface may comprise a lower enclosure connected to an upper enclosure by a first zipper. The X-ray cassette enclosure may have an opening sealed by a second zipper located between the first zipper and the top surface of the support surface. The second zipper may have a different appearance than the first zipper. The opening of the X-ray cassette enclosure may extend at least partially around both sides of the support surface and completely across the head end of the support surface. The top portion may extend over the upper enclosure. A fluid resistant material may be welded over the tear resistant material of the second zipper to fluidly seal the opening of the X-ray cassette enclosure.

Alternatively, the sensor may be positioned below the support surface. The sensor determines when the patient is within a predetermined range of the sensor. The indicator may provide an alert when the sensor determines that the patient is within a predetermined range of the sensor. The sensor may be disposed below the support surface. The conductive material may be disposed below the top portion. The sensor can determine when the conductive material is within a predetermined range of the sensor. The indicator may provide an alert when the sensor determines that the conductor is within a predetermined range of the sensor.

In yet another aspect of the disclosed embodiment, the patient support device can include a support surface with a top. The top may be configured to conduct air along the top surface of the support surface to carry heat and moisture from a patient lying on the support surface away from the top surface of the support surface. The inlet port may be disposed within the support surface and fluidly connected to the top. The pneumatic blower may have an outlet port connected to an inlet port of the support surface. The pneumatic blower may direct air through an inlet port to the top. An end-of-life indicator may be coupled to the support surface to indicate when the support surface reaches the end of the service life of the support surface.

Optionally, the end-of-life indicator comprises a chemical strip that erodes or grows over time. The end-of-life indicator may include a timer for tracking how long the support surface has been used. The end-of-life indicator may include a timer for tracking the total time that the support surface has received power. The end-of-life indicator may include a transmitter to send a signal to the user interface indicating the remaining life of the support surface.

It is envisaged that the interface is provided on the side of the support surface. The interface may include a dial to select a patient weight range. A plurality of bladders within the support surface may be inflated or deflated to adjust the support surface to the patient's weight range. The interface may include an end-of-life indicator.

In some embodiments, the end-of-life indicator may include a sensor disposed below the support surface. The sensor may determine when the patient is within a predetermined range of the sensor. The end-of-life indicator may provide an end-of-life alert when the sensor determines that the patient is within a predetermined range of the sensor. The end-of-life indicator may include a sensor disposed below the support surface. The conductive material may be disposed below the top portion. The sensor can determine when the conductive material is within a predetermined range of the sensor. The end-of-life indicator may provide an end-of-life alert when the sensor determines that the conductor is within a predetermined range of the sensor.

In another aspect of the disclosed embodiment, the patient support device can include a support surface with a top portion. The top may be configured to conduct air along the top surface of the support surface to carry heat and moisture from a patient lying on the support surface away from the top surface of the support surface. The support surface may comprise a lower enclosure connected to an upper enclosure by a first zipper. The pneumatic blower may have an outlet port connected to the inlet port of the support surface. The pneumatic blower may direct air through an inlet port to the top. The X-ray cassette enclosure may have an opening sealed by a second zipper located between the first zipper and the top surface of the support surface.

Alternatively or additionally, the second zipper may have a different appearance than the first zipper. The first zipper may have a first color different from a second color of the second zipper. The first zipper may have a first dimension that is different from a second dimension of the second zipper.

Desirably, the opening of the X-ray cassette enclosure extends at least partially along three sides of the support surface. The opening of the X-ray cassette enclosure may extend at least partially around both sides of the support surface and completely across the head end of the support surface.

In some embodiments, a fluid-resistant material may be welded over the tear-resistant material of the second zipper to fluidly seal the opening of the X-ray cassette enclosure. The fluid-proof material may be welded by ultrasonic welding. The fluid resistant material may be welded using radio frequency welding.

In yet another aspect of the disclosed embodiment, the patient support device can include a support surface with a top portion. The top may be configured to conduct air along the top surface of the support surface to carry heat and moisture from a patient lying on the support surface away from the top surface of the support surface. The support surface may comprise a lower enclosure connected to an upper enclosure. The pneumatic blower may have an outlet port connected to the inlet port of the support surface. The pneumatic blower may direct air through an inlet port to the top. The X-ray cassette enclosure can have an opening that is sealed by an enclosure zipper that extends at least partially along three sides of the support surface.

Alternatively, the lower enclosure may be connected to the upper enclosure by an enclosure zipper. The sleeve zipper can have a different appearance than the enclosure zipper. The sleeve zipper may have a first color that is different from a second color of the enclosure zipper. The sleeve zipper may have a first dimension that is different from a second dimension of the enclosure zipper.

Desirably, the sleeve zipper extends at least partially around both sides of the support surface and completely across the head end of the support surface.

In some embodiments, a fluid-resistant material may be welded over the tear-resistant material of the containment zipper to fluidly seal the opening of the X-ray cassette enclosure. The fluid-proof material may be welded by ultrasonic welding. The fluid resistant material may be welded using radio frequency welding.

In another aspect of the disclosed embodiments, a patient support device can include a support surface having a head end and a foot end. The support surface may be at a top surface of a first height. The top surface may extend from the head end to the foot end. A heel support mechanism (heel suspension mechanism) may be built into the foot end of the support surface. The heel support mechanism may be configured to change a height of the top surface at the foot end of the support surface to a second height different from the first height. The second height may be greater than the first height. The second height may be less than the first height.

Desirably, the heel support mechanism includes a plate disposed below the foot end of the support surface. The plate member may have at least one groove. The pull rod may be seated within the groove and have a cam attached thereto. A handle may extend from the pull rod to rotate the pull rod. The pull rod is rotatable between a lowered position in which the cam maintains the top surface of the foot end at a first height and a raised position in which the cam raises the top surface of the foot end to a second height. The plate member may have a plurality of grooves. The pull rod is movable between the plurality of grooves to adjust the cam-actuated foot end portion.

Alternatively, the heel support mechanism may have a bladder disposed within the foot end of the support surface to vary the height of the top surface of the foot end. The bladder may be inflatable to elevate the top surface of the foot end to the second height. The second height may be greater than the first height. The bladder may be deflatable to lower the top surface of the foot end to the second height. The second height may be less than the first height. The balloon may be inflated and deflated by a manual pump. The air bags may be inflated and deflated by a pump of the microclimate system. The heel suspension mechanism may include a plurality of bladders. Each of the plurality of air cells may be positioned under one of the portions of the foot end. One of the plurality of air bags may be activated to change the height of the corresponding portion of the foot end.

Alternatively or additionally, the heel suspension mechanism may have a foam wedge attached to the foot end and movable to change the height of the top surface of the foot end. The foam wedge may be rotated relative to the foot end such that the foam wedge is disposed at the second height. The foam cleat may translate along the foot end such that the foam cleat is disposed at the second height.

In some embodiments, the heel suspension mechanism may have at least one cam located under the foot end. The diaphragm may be disposed between the at least one cam and the foot end. The cam may be rotatable to move the diaphragm. The membrane may change the height of the top surface of the foot end as the membrane moves. The heel suspension mechanism may have a plurality of cams. At least one of the plurality of cams may be rotatable to move the diaphragm. The diaphragm may have hinged plates. When the cam rotates, the cam may rotate the hinge plates. The heel suspension mechanism may have a plurality of hinge plates and a plurality of cams. Each cam may be positioned below one of the plurality of hinge plates and may be rotatable to rotate the respective hinge plate.

It is contemplated that the support surface includes a base surface and the heel suspension mechanism includes a top surface above the base surface at the foot end. The top surface can be configured to be rolled into a rolled configuration to vary the height of the top surface of the foot end. A fastening mechanism may be provided to secure the top surface to the base surface.

Desirably, the heel suspension mechanism has a jack located beneath the foot end. The jack may be activated to change the height of the top surface of the foot end. The jack may be a hydraulic jack or manually operated.

In some embodiments, the heel suspension mechanism may be a telescoping member disposed below the foot end. The telescoping member may be adjustable to vary the height of the top surface of the foot end. The telescoping members may be hydraulic or manual.

In another aspect of the disclosed embodiments, a patient support device can include a support surface including a mattress having a top cover and at least one support member. The flexible substrate may be disposed below the top cover and above the at least one support member. The first conductive trace may be carried by the flexible substrate and the second conductive trace may be carried by the flexible substrate adjacent the first conductive trace. When the flexible substrate is dry, an open circuit may be formed between the first conductive trace and the second conductive trace. A threshold amount of liquid present on the flexible substrate may form a closed circuit with the first and second conductive traces due to wetting of the flexible substrate.

It is contemplated that the first and second conductive traces include conductive wires woven into the flexible substrate. The first and second conductive traces may include conductive ink printed on the flexible substrate.

In some embodiments, the impedance between the first conductive trace and the second conductive trace may be changed when the flexible substrate becomes wet.

Alternatively, the flexible substrate may be a plastic sheet. The first conductive trace and the second conductive trace may be woven into the plastic sheet.

Alternatively or additionally, an alarm may be activated when the impedance between the first conductive trace and the second conductive trace changes. The alert may be a visual alert. The alarm may be an audible alarm. The alarm may be located remotely from the support surface.

In some embodiments, a passive RFID tag may be located on the flexible substrate and in electrical communication with the first conductive trace and the second conductive trace. The antenna may receive wireless energy transmitted by the passive RFID tag indicating whether the flexible substrate is dry or wet. The reader may power the antenna. The reader may receive a signal from the antenna and send a notification message in response to at least one signal from the antenna indicating that the flexible substrate is wet. The reader may be communicatively connected to a network of the medical facility. The reader may be configured to communicate wirelessly with the network.

Desirably, the flexible substrate is generally rectangular in shape and the RFID tag is mounted closer to an edge of the flexible substrate than to the middle of the flexible substrate.

Optionally, the first conductive trace includes a first trace segment and the second conductive trace includes a second trace segment. The first trace segment may be spaced apart from and interleaved with the second trace segment.

In some embodiments, the flexible substrate comprises a plastic film, and the first and second conductive traces are woven into the plastic film. The flexible substrate may include a hydrophobic material, and the wicking material may cover the first and second conductive traces. The flexible substrate may comprise a synthetic resin or a thermoplastic polymer material.

According to another aspect of the present disclosure, a patient support device may have a support layer. The mattress layer may be disposed on the support layer. The treatment layer may be disposed on the mattress layer and may have a plurality of bladders configured to inflate. The protective layer may be over the therapeutic layer. The control unit may be configured to inflate the treatment layer. In the normal mode, the control unit may not be connected to the treatment layer and may deflate the treatment layer. In the treatment mode, the control unit may be connected to the treatment layer to inflate the treatment layer.

In some embodiments, each of the plurality of bladders may be inflated individually. The treatment layer may be inflated with alternating pressures.

Alternatively, the supporting layer may be arranged on the bed base. The control unit may be disposed on the frame. A hose may extend from the control unit and be configured to connect to the treatment layer. The hose may be connected to the inlet of the treatment layer. The control unit may comprise a pump. The control unit may include a user input to selectively vary the pressure in the treatment layer. When the control unit is disconnected from the treatment layer, the treatment layer can be deflated.

Alternatively or additionally, the support layer may comprise a foam. The mattress may include foam. The protective layer may include a three-dimensional spacer. The protective layer may comprise a nonwoven layer. The protective layer may comprise foam.

Desirably, each of the plurality of bladders is inflatable to a different pressure.

It is contemplated that the cover surrounds the support layer, the mattress layer, the treatment layer, and the protective layer. The covering may include a zipper configured to seal the covering around the support layer, mattress layer, treatment layer, and protective layer.

According to another aspect of the present disclosure, a patient support device may include a mattress assembly having a foam support layer. The foam mattress layer may be disposed on the foam support layer. The treatment layer may be disposed on the foam mattress layer and may have a plurality of bladders. The protective layer may be disposed over the therapeutic layer. The control unit may be configured to inflate the treatment layer. In the normal mode, the control unit may not be connected to the treatment layer and may deflate the treatment layer. In the treatment mode, the hose may connect the control unit to the treatment layer to inflate the treatment layer.

In some embodiments, the treatment layer may be inflated with alternating pressures.

Alternatively, the supporting layer may be arranged on the bed base. The control unit may be disposed on the frame. The control unit may comprise a pump. The control unit may include a user input to selectively vary the pressure in the treatment layer. When the control unit is disconnected from the treatment layer, the treatment layer can be deflated.

Alternatively or additionally, the protective layer may include at least one of a three-dimensional spacer, a non-woven layer, or foam.

Desirably, each of the plurality of bladders is inflatable to a different pressure.

In some embodiments, the covering surrounds the mattress assembly.

According to one aspect of the disclosed embodiments, a patient support device may include a first foam layer and a second foam layer disposed on the first foam layer. A manifold may be disposed on the second foam layer. The manifold may have a plurality of apertures. A patient three-dimensional spacer may be positioned on the manifold and configured to receive a patient. The blower may be configured to direct an air flow into the manifold. The gas flow may exit the manifold through a plurality of holes and enter the patient three-dimensional spacer.

Desirably, the manifold includes a bottom fabric layer and a top fabric layer. The manifold three-dimensional spacer may be disposed between the bottom fabric layer and the top fabric layer. A plurality of apertures may be formed in the top fabric layer. The plurality of holes may be positioned at high pressure points in the patient's three-dimensional spacer. A plurality of holes may be disposed in the seating area of the patient three-dimensional spacer. The air flow may enter a manifold in the manifold three-dimensional spacer. The patient three-dimensional spacer may have a smaller thickness than the manifold three-dimensional spacer.

Alternatively or additionally, the second foam layer may be an adhesive foam. The first foam layer may be disposed on the support foam layer.

Optionally, a plurality of holes may be formed in the seating area for airflow from the manifold to the seating area of the patient three-dimensional spacer. The patient three-dimensional spacer may have an exit aperture for the flow of air out of the patient three-dimensional spacer. The exit orifice may be positioned at the head end of the patient three-dimensional spacer. The airflow may enter the patient three-dimensional spacer at the seating area and flow to the head end of the patient three-dimensional spacer.

It is envisaged that the blower is located in the foot end of the patient support means. The blower may be located external to the patient support device and include a hose leading to a manifold.

In some embodiments, the blower housing may house a blower. The blower housing may be disposed in a foot end of the patient support device. The blower housing can include a base having a vacuum chamber and a top cover sealed to the base to create a pressurized chamber. The air inlet of the blower may be sealed to the vacuum chamber.

Desirably, the inlet is in flow communication with the vacuum chamber. A pair of inlets may be in flow communication with the vacuum chamber. The inlet may comprise an air inlet extending into the inlet cavity. A ridge may be formed at the bottom of the air inlet to prevent direct ingress of fluid into the cavity. The ridge may cover a portion of the air inlet.

Alternatively, the outlet of the blower may be in flow communication with the pressurization chamber. An outlet may be formed in the top cover. The outlet may release the air flow from the pressurization chamber to the manifold.

In some embodiments, the blower may increase in speed to maintain pressure when the inlet of the blower housing is blocked. When the outlet of the blower housing is blocked, the blower may be slowed to maintain pressure.

In accordance with another aspect of the disclosed embodiments, a blower assembly for a patient support device may include a blower housing having a base forming a vacuum chamber and a top cover sealed to the base to create a pressurized chamber. The blower may have an inlet and an outlet. The inlet may be sealed to the vacuum chamber. The outlet may be in flow communication with the pressurization chamber. A pair of inlets may be in flow communication with the vacuum chamber.

Optionally, the blower housing may be disposed in a foot end of the patient support device. The blower housing may be located external to the patient support device and may include a hose connecting the blower housing to a manifold of the patient support device.

It is contemplated that each of the pair of inlets includes an inlet port extending into the inlet cavity. A ridge may be formed at the bottom of the air inlet to prevent direct intrusion of fluid into the cavity. The ridge may cover a portion of the air inlet.

Alternatively or additionally, an outlet may be formed in the top cover. The outlet may release the flow of air from the pressurization chamber to a manifold of the patient support device.

It is desirable that the blower increase speed to maintain pressure when the inlet of the blower housing is blocked. When the outlet of the blower housing is blocked, the blower may be slowed to maintain pressure.

According to yet another aspect of the disclosed embodiment, a method of monitoring operation of a blower assembly may include setting a predetermined speed of a blower in the blower assembly. The method may also include monitoring a speed of a blower in the blower assembly. The method may further include comparing the monitored blower speed to a predetermined speed. The method may also include determining whether the blower assembly is jammed based on a comparison of the monitored speed and a predetermined speed.

Optionally, determining whether the blower assembly is jammed may include: when the monitored speed is substantially equal to the predetermined speed, it is determined that the blower assembly is not jammed. Determining whether the blower assembly is clogged may include: when the monitored speed is greater than the predetermined speed, it is determined that the air inlet of the blower assembly is blocked. Determining whether the blower assembly is clogged includes: when the monitored speed is less than the predetermined speed, it is determined that the outlet of the blower assembly is blocked.

In accordance with another aspect of the disclosed embodiments, a patient support device can include a first foam layer and a second foam layer disposed on the first foam layer. The manifold may be disposed on the second foam layer. The manifold may include a bottom fabric layer and a top fabric layer. The manifold may be disposed between the bottom fabric layer and the top fabric layer. A plurality of apertures may be formed in the top fabric layer. A patient three-dimensional spacer may be positioned on the manifold and configured to receive a patient. An exit orifice may be formed in the head end of the patient three-dimensional spacer. The blower may be configured to direct the air flow into the manifold three-dimensional spacer. The gas flow may exit the manifold three-dimensional spacer and enter the patient three-dimensional spacer through a plurality of apertures. The air flow may flow through the patient three-dimensional spacer to the exit aperture.

In some embodiments, a plurality of holes may be disposed at high pressure points in the patient three-dimensional spacer. A plurality of holes may be disposed in the seating area of the patient three-dimensional spacer.

Optionally, the patient three-dimensional spacer may have a smaller thickness than the manifold three-dimensional spacer. The second foam layer may be an adhesive foam. The first foam layer may be disposed on the support foam layer.

Desirably, the blower is disposed in the foot end of the patient support device. The blower may be located external to the patient support device and include a hose leading to a manifold.

It is contemplated that the blower housing houses a blower. The blower housing can include a base having a vacuum chamber. The top can be sealed to the base to create a pressurized chamber. The blower housing may be disposed in a foot end of the patient support device. The air inlet of the blower may be sealed to the vacuum chamber. The inlet may be in flow communication with the vacuum chamber. The inlet may comprise an air inlet extending into the inlet cavity. A ridge may be formed at the bottom of the air inlet to prevent direct intrusion of fluid into the cavity. The ridge may cover a portion of the air inlet. The outlet of the blower may be in flow communication with the pressurization chamber. An outlet may be formed in the top cover. The outlet may release the air flow from the pressurization chamber to the manifold.

Alternatively, the blower may increase in speed to maintain pressure when the inlet of the blower housing is blocked. When the outlet of the blower housing is blocked, the blower may be slowed to maintain pressure.

In accordance with another aspect of the disclosed embodiment, a patient support device can include a support surface with a top portion. The top may be configured to conduct air along the top surface of the support surface to carry heat and moisture from a patient lying on the support surface away from the top surface of the support surface. The support surface may comprise a lower enclosure connected to an upper enclosure by a first zipper. The pneumatic blower may have an outlet port connected to the inlet port of the support surface. The pneumatic blower may direct air through an inlet port to the top. The X-ray cassette enclosure may have an opening extending at least partially along both sides of the support surface. The opening may be sealed by a pair of second zippers. Each second zipper may be positioned between the first zipper and the top surface of the support surface.

In some embodiments, each second zipper may have a different appearance than the first zipper. The first zipper may have a first color different from a second color of each of the second zippers. The first zipper may have a first dimension different from a second dimension of each of the second zippers.

Alternatively, the opening may not extend along the head of the support surface.

Desirably, a fluid resistant material can be welded over the tear resistant material of the second zipper to fluidly seal the opening of the X-ray cassette enclosure. The fluid-proof material may be welded by ultrasonic welding. The fluid resistant material may be welded using radio frequency welding.

In accordance with yet another aspect of the disclosed embodiment, a patient support device can include a support surface with a top portion. The top may be configured to conduct air along the top surface of the support surface to carry heat and moisture from a patient lying on the support surface away from the top surface of the support surface. The support surface may comprise a lower enclosure connected to an upper enclosure. The pneumatic blower may have an outlet port connected to the inlet port of the support surface. The pneumatic blower may direct air through an inlet port to the top. The X-ray cassette enclosure may have an opening sealed by a pair of sleeves with zippers. Each of the pair of sleeve zippers may extend at least partially along a side of the support surface.

In some embodiments, the lower enclosure may be connected to the upper enclosure by an enclosure zipper. Each of the sleeve zippers may have a first color that is different from a second color of the enclosure zipper. Each of the sleeve zippers can have a first size that is different from a second size of the enclosure zipper.

Optionally, a fluid-resistant material may be welded over the tear-resistant material of each of the containment zippers to fluidly seal the opening of the X-ray cassette enclosure. The fluid-proof material may be welded by ultrasonic welding. The fluid resistant material may be welded using radio frequency welding.

Additional features, alone or in combination with any other features (such as those listed above and/or those listed in the claims), may be included with the patentable subject matter and will become apparent to those skilled in the art upon consideration of the following detailed description of various embodiments, which exemplify the best mode presently known of carrying out various embodiments.

In accordance with another aspect of the disclosed embodiment, a patient support device can include a support surface configured to conduct air along a top surface of the support surface to carry heat and moisture away from the top surface of the support surface from a patient lying on the support surface. An opening may be formed in a side of the support surface. The cavity may extend from the opening into the support surface. An inlet may be disposed within the cavity and fluidly connected to the top surface. The pneumatic blower may be configured to be disposed within the cavity. When the pneumatic blower is disposed within the cavity, the pneumatic blower may have an outlet port connected to the inlet port. The air blower may direct air through the inlet port to the top surface of the support surface.

In some embodiments, an end-of-life indicator may be coupled to the support surface to indicate when the support surface reaches the end of the service life of the support surface.

Alternatively, the support surface may comprise a lower enclosure connected to an upper enclosure by a first zipper. The patient support device may include an X-ray cassette enclosure having an opening sealed by a second zipper located between the first zipper and the top surface of the support surface.

Additionally or alternatively, the X-ray cassette enclosure may have an opening that is sealed by a zipper extending at least partially along three sides of the support surface.

Desirably, the heel support mechanism may be built into the foot end of the support surface. The heel support mechanism may be configured to vary a height of the top surface at the foot end of the support surface.

It is contemplated that the support surface may include at least one support member. The patient support device may also include a flexible substrate disposed over the at least one support member. The first conductive trace may be carried by the flexible substrate. The second conductive trace may be carried by the flexible substrate adjacent to the first conductive trace. When the flexible substrate is dry, an open circuit may be formed between the first conductive trace and the second conductive trace. A threshold amount of liquid present on the flexible substrate may form a closed circuit with the first and second conductive traces due to wetting of the flexible substrate.

In some embodiments, the support surface may include a treatment layer having a plurality of bladders configured to inflate. The protective layer may be disposed over the therapeutic layer. The control unit may be configured to inflate the treatment layer. In the normal mode, the control unit may be disconnected from the treatment layer and deflate the treatment layer. In the treatment mode, the control unit may be connected to the treatment layer to inflate the treatment layer.

Optionally, the support surface may comprise a foam support layer. The foam mattress layer may be disposed on the foam support layer. The treatment layer may be disposed on the foam mattress layer and have a plurality of pockets. The protective layer may be disposed over the therapeutic layer. The control unit may be configured to inflate the treatment layer. In the normal mode, the control unit may be disconnected from the treatment layer and deflate the treatment layer. In the treatment mode, the hose may connect the control unit to the treatment layer to inflate the treatment layer.

Additionally or alternatively, the patient support surface may comprise a first foam layer. The second foam layer may be disposed on the first foam layer. The manifold may be disposed on the second foam layer. The manifold may have a plurality of apertures. A patient three-dimensional spacer may be positioned on the manifold and configured to receive a patient. The blower may be configured to direct a flow of air into the manifold. The gas flow exits the manifold through a plurality of apertures and enters the patient three-dimensional spacer.

Desirably, the blower may include a blower housing having a base forming the vacuum chamber and a top sealed to the base to create the pressurized chamber. The fan may be disposed with the pressurization chamber. The fan inlet may be sealed to the vacuum chamber. The fan outlet may be in flow communication with the pressurization chamber. A pair of housing inlets may be in flow communication with the vacuum chamber.

It is contemplated that the blower may be controlled by setting a predetermined speed of the blower. The speed of the blower may be monitored. The monitored speed of the blower may be compared to a predetermined speed. Whether the blower is jammed may be determined based on a comparison of the monitored speed and a predetermined speed.

In some embodiments, the support surface may further comprise a first foam layer. The second foam layer may be disposed on the first foam layer. The manifold may be disposed on the second foam layer. The manifold may include a bottom fabric layer and a top fabric layer. The manifold three-dimensional spacer may be disposed between the bottom fabric layer and the top fabric layer. A plurality of apertures may be formed in the top fabric layer. A patient three-dimensional spacer may be positioned on the manifold and configured to receive a patient. An exit orifice may be formed in the head end of the patient three-dimensional spacer. The blower may be configured to direct the air flow into the manifold three-dimensional spacer. The gas flow may exit the manifold three-dimensional spacer and enter the patient three-dimensional spacer through a plurality of apertures. The air flow may flow through the patient three-dimensional spacer to the exit aperture.

Alternatively, the X-ray cassette enclosure may have openings extending at least partially along both sides of the support surface.

Additionally or alternatively, the X-ray cassette enclosure may have an opening that is sealed by a pair of enclosures zippers. Each of the pair of zippers may extend at least partially along one side of the support surface.

Desirably, the electronics enclosure can be positioned within a support surface. The wires may extend from the electronics housing and be grounded. An overmold may be formed over the wires. Terminals may extend from the wires, through the overmold, to provide ground test points.

In some embodiments, the support surface outlet port may extend through the support surface and may be in fluid communication with an outlet port of the blower. The support surface outlet port may have a lip to facilitate preventing fluid from entering the support surface outlet port.

In accordance with yet another aspect of the disclosed embodiment, a patient support device includes a support surface configured to conduct air along a top surface of the support surface to carry heat and moisture away from a patient lying on the support surface over the top surface of the support surface. An opening may be formed in a side of the support surface. The cavity may extend from the opening into the support surface. An inlet port may be disposed within the cavity and fluidly connected to the top surface. The blower assembly may be configured to be disposed within the cavity. The blower assembly may have an outlet port connected to the inlet port when the blower assembly is disposed within the cavity. The blower assembly may direct air through the inlet port to the top surface of the support surface.

According to one aspect of the disclosed embodiments, a patient support device may include a cover portion having a foot end and an opposing head end. A pair of sides may extend between the foot end and the head end. The cover inlet may extend through the cover. The cover outlet may extend through the cover. A blower assembly may be disposed in the cover, the blower assembly may have a blower inlet in flow communication with the cover inlet and the blower outlet. The microclimate management system may be in flow communication with the blower outlet. Air may flow through the cover inlet to the blower assembly, and the blower assembly may discharge the air to the microclimate management system. Air may be exhausted from the microclimate management system through the lid outlet.

In some embodiments, the cover inlet may be disposed at one of the cover sides. Some embodiments may include two cover inlets. Each cover inlet may be positioned at one of the cover sides. The blower assembly may include two blower inlets. Each blower inlet may be in fluid communication with one of the cover inlets. The cover outlet may be disposed at a head end of the cover. Some embodiments may include a plurality of cover outlets.

Optionally, the cover inlet may comprise an opening. The access cover may partially cover the opening. The plug may be disposed in the opening and may be configured to connect the cover inlet to the blower inlet. The plug may include an opening flange configured to be inserted into the opening. The blower flange can be configured to connect to a blower inlet. The passage may extend through the plug. The channel may have an axis that is coaxial with the axis of the opening when the opening flange is inserted into the opening. The cover outlet may comprise an opening. The outlet cover may partially cover the opening. The plug may be disposed in the opening and may be configured to connect the lid outlet to an outlet of the microclimate management system. The plug may include an opening flange configured to be inserted into the opening. The cover outlet may include a notch and the plug may include a tab. When the opening flange is inserted into the opening, the tabs may be received in the notches to prevent rotation of the plug relative to the cover outlet. When the opening flange is inserted into the opening, the plug may include a lip extending from the opening.

Additionally or alternatively, the ground plate may be disposed in the blower assembly. The ground line may extend from the ground plate. The ground wire may extend through the cover portion. The grounding lug may extend from the ground wire. The grounding lug can be configured to enable testing of the blower assembly. The grounding lugs may enable impedance testing of the blower assembly.

Desirably, the power line may extend through the cover portion. The power line may include an overmold. The cover may include an umbilical portion. The umbilical may be secured to the overmold to prevent fluid from entering the cover. The overmold may include a pair of ridges. The notch may be defined between two ridges. The umbilical portion may be secured to the overmold by at least one of a tie or a clamp being secured within the recess.

In accordance with another aspect of the disclosed embodiment, a patient support device can include a cover portion having a foot end and an opposing head end. A pair of sides may extend between the foot end and the head end. A pair of cover inlets may be provided. Each cover inlet may extend through one of the cover sides. A plurality of cover outlets may extend through the head end of the cover. The blower assembly may be disposed in the cover. The blower assembly may have a blower inlet in flow communication with the cover inlet and the blower outlet. The microclimate management system may be in flow communication with the blower outlet. Air may flow through the cover inlet to the blower assembly, and the blower assembly may discharge the air to the microclimate management system. Air may be exhausted from the microclimate management system through the lid outlet.

Desirably, the blower assembly may include two blower inlets. Each blower inlet may be in fluid communication with one of the cover inlets. The cover inlet may include an opening. The access cover may partially cover the opening. The plug may be disposed in the opening and may be configured to connect the cover inlet to the blower inlet. The plug may include an opening flange configured to be inserted into the opening. The blower flange can be configured to connect to a blower inlet. The passage may extend through the plug. The channel may have an axis that is coaxial with the axis of the opening when the opening flange is inserted into the opening.

In some embodiments, the cover outlet may comprise an opening. The outlet cover may partially cover the opening. The plug may be disposed in the opening and may be configured to connect the lid outlet to an outlet of the microclimate management system. The plug may include an opening flange configured to be inserted into the opening. The cover outlet may include a notch and the plug may include a tab. When the opening flange is inserted into the opening, the tab may be received in the notch to prevent rotation of the plug relative to the cover outlet. When the opening flange is inserted into the opening, the plug may include a lip extending from the opening.

Alternatively, the ground plate may be disposed in the blower assembly. The ground line may extend from the ground plate. The ground wire may extend through the cover portion. The grounding lug may extend from the ground wire. The grounding lug can be configured to enable testing of the blower assembly. The grounding lugs may enable impedance testing of the blower assembly.

Additionally or alternatively, the power line may extend through the cover. The power line may include an overmold. The cover may include an umbilical portion. The umbilical may be secured to the overmold to prevent fluid from entering the cover. The overmold may include a pair of ridges. The notch may be defined between two ridges. The umbilical portion may be secured to the overmold by at least one of a tie or a clamp secured within the recess.

In accordance with yet another aspect of the disclosed embodiment, a patient support device can include a cover portion having a foot end and an opposing head end. A pair of sides may extend between the foot end and the head end. The cover inlet may extend through the cover. The cover inlet may have an opening. The access cover may partially cover the opening. A plug may be disposed in the opening and configured to connect the cover inlet to a blower assembly located within the cover.

Desirably, the cover inlet may be disposed at one of the cover sides. Some embodiments may include two cover inlets. Each cover inlet may be positioned at one of the cover sides. The blower assembly may include two blower inlets. Each blower inlet may be in fluid communication with one of the cover inlets. The plug may include an opening flange configured to be inserted into the opening. The blower flange can be configured to be connected to a blower assembly. The passage may extend through the plug. The channel may have an axis that is coaxial with the axis of the opening when the opening flange is inserted into the opening.

In accordance with another aspect of the disclosed embodiment, a patient support device can include a cover portion having a foot end and an opposing head end. A pair of sides may extend between the foot end and the head end. The cover outlet may extend through the cover. The cover outlet may comprise an opening. The outlet cover may partially cover the opening. The plug may be disposed in the opening and may be configured to connect the lid outlet to a microclimate management system located within the lid.

It is contemplated that the cover outlet may be disposed in the head end of the cover. Some embodiments may include a plurality of cover outlets. The plug may include an opening flange configured to be inserted into the opening. The cover outlet may include a notch and the plug may include a tab. When the opening flange is inserted into the opening, the tab may be received in the notch to prevent rotation of the plug relative to the cover outlet. When the opening flange is inserted into the opening, the plug may include a lip extending from the opening.

In accordance with yet another aspect of the disclosed embodiment, a patient support device can include a cover portion having a foot end and an opposing head end. A pair of sides may extend between the foot end and the head end. The blower assembly may be disposed in the cover. The ground plate may be disposed in the blower assembly. The ground line may extend from the ground plate. The ground wire may extend through the cover portion.

In some embodiments, the grounding lug may extend from the ground wire. The grounding lug can be configured to enable testing of the blower assembly. The grounding lugs may enable impedance testing of the blower assembly.

Optionally, the blower assembly may include a blower inlet that may be in fluid communication with a cover inlet located in the cover. The cover inlet may include an opening. The access cover may partially cover the opening. The plug may have an opening flange configured to be inserted into the opening. The blower flange can be configured to connect to a blower inlet. The passage may extend through the plug. The channel may have an axis that is coaxial with the axis of the opening when the opening flange is inserted into the opening.

In some embodiments, the blower assembly may include a blower outlet in fluid communication with a cover outlet located in the cover. The cover outlet may comprise an opening. The outlet cover may partially cover the opening. The plug may have an opening flange configured to be inserted into the opening. The plug may be configured to connect to an outlet of a microclimate management system. The cover outlet may include a notch and the plug may include a tab. When the opening flange is inserted into the opening, the tab may be received in the notch to prevent rotation of the plug relative to the cover outlet. When the opening flange is inserted into the opening, the plug may include a lip extending from the opening.

It is contemplated that the power line may extend through the cover portion. The power line may include an overmold. The cover may include an umbilical portion. The umbilical may be secured to the overmold to prevent fluid from entering the cover. The overmold may include a pair of ridges. The notch may be defined between two ridges. The umbilical portion may be secured to the overmold by at least one of a tie or a clamp secured within the recess. The power and ground wires may be bundled together.

According to one aspect of the disclosed embodiments, a patient support device may include a cover portion having a foot end and an opposing head end. A pair of sides may extend between the foot end and the head end. The cover may have an umbilical portion. The blower assembly may be disposed in the cover. The power cord may extend from the blower assembly and through the cover portion. The power line may have an overmold. The umbilical may be secured to the overmold to prevent fluid from entering the cover.

In some embodiments, the overmold may include a pair of ridges. The notch may be defined between two ridges. The umbilical portion may be secured to the overmold by at least one of a tie or a clamp secured within the recess.

Alternatively, the ground plate may be disposed in the blower assembly. The ground line may extend from the ground plate. The ground wire may extend through the cover portion. The grounding lug may extend from the ground wire. The grounding lug can be configured to enable testing of the blower assembly. The grounding lugs may enable impedance testing of the blower assembly.

Optionally, the blower assembly may include a blower inlet that may be in fluid communication with a cover inlet located in the cover. The cover inlet may include an opening. The access cover may partially cover the opening. The plug may have an opening flange configured to be inserted into the opening. The blower flange can be configured to connect to a blower inlet. The passage may extend through the plug. The channel may have an axis that is coaxial with the axis of the opening when the opening flange is inserted into the opening.

In some embodiments, the blower assembly may include a blower outlet in fluid communication with a cover outlet located in the cover. The cover outlet may comprise an opening. The outlet cover may partially cover the opening. The plug may have an opening flange configured to be inserted into the opening. The plug may be configured to connect to an outlet of a microclimate management system. The cover outlet may include a notch and the plug may include a tab. When the opening flange is inserted into the opening, the tab may be received in the notch to prevent rotation of the plug relative to the cover outlet. When the opening flange is inserted into the opening, the plug may include a lip extending from the opening.

Drawings

The detailed description makes reference, in particular, to the accompanying drawings, in which:

FIG. 1 is a perspective view of an illustrative patient support apparatus including a microclimate system supported on a frame structure, wherein the microclimate system is shown including a support surface;

FIG. 2 is a perspective view of the microclimate system of FIG. 1, showing that the support surface includes a roof that cooperates with a lower enclosure to enclose other components of the support surface;

FIG. 3 is a perspective view of the patient support device of FIG. 1 having a support surface and a pneumatic blower connected to a foot end thereof in accordance with an embodiment;

FIG. 4 is an elevation view of the interface of the support surface of FIG. 3;

FIG. 5 is a perspective view of the patient support device of FIG. 1 having a support surface according to one embodiment and a pneumatic blower coupled to the patient support device;

FIG. 6 is a perspective view of the patient support device of FIG. 1 having a support surface according to one embodiment and a pneumatic blower located therein;

FIG. 7 is an elevation view of the interface of the support surface of FIG. 6;

FIG. 8 is a perspective view of a controller-equipped power cord of a pneumatic blower;

FIG. 9 is a perspective view of the patient support device of FIG. 1 having a support surface and a pneumatic blower coupled to the patient support device in accordance with one embodiment;

FIG. 10 is a front view of an interface of a pneumatic blower according to an embodiment;

figure 11 is a front perspective view of a patient hanger for a support surface formed in accordance with one embodiment;

figure 12 is a front perspective view of a patient hanger for a support surface formed in accordance with one embodiment;

FIG. 13 is a view of a patient support device having a pneumatic blower connected to its frame and a compression sleeve fluidly connected to the pneumatic blower;

FIG. 14 is a schematic view of a screen of a user interface configured to control air flow to the compression sleeve shown in FIG. 13;

FIG. 15 is a perspective view of a patient support device having a scale incorporated into a support surface thereof according to an embodiment;

FIG. 16 is a schematic illustration of a screen for monitoring the scale of FIG. 15;

FIG. 17 is a perspective view of a patient support device having an end-of-life monitor incorporated into a support surface thereof according to an embodiment;

FIG. 18 is a schematic diagram of a screen for monitoring the end-of-life monitor of FIG. 17;

FIG. 19 is a perspective view of a patient support device having a support surface with an end-of-life indicator incorporated into a top surface of the support surface;

FIG. 20 is a perspective view of a patient support device having a support surface with an end-of-life indicator incorporated into a side of the support surface;

FIG. 21 is a front view of the end-of-life indicator of FIG. 20;

FIG. 22 is a top perspective view of a patient support surface having an X-ray sleeve extending along a head end of the support surface from a first side to a second side;

FIG. 23 is a perspective view of a portion of the X-ray sheath shown in FIG. 22 and showing a zipper that fluidly seals the X-ray sheath to prevent body fluids from entering the X-ray sheath;

FIG. 24 is a perspective view of a portion of the X-ray sheath shown in FIG. 22 and showing a liner of the X-ray sheath;

FIG. 25 is a perspective view of a portion of the X-ray sheath shown in FIG. 22 and showing a cavity configured to receive an X-ray cassette therein, wherein the X-ray cassette can be placed under the chest, abdomen or buttocks of a patient on a support surface;

FIG. 26 is a perspective view of a patient support surface having a touch sensor disposed therein to detect bottoming of the support surface, wherein the touch sensor is electrically connected to an electronic controller located within the support surface and is configured to alert a caregiver when the support surface has bottoming;

FIG. 27 is a cross-sectional view of one embodiment of the support surface shown in FIG. 26, showing the support surface without a patient or load positioned thereon;

FIG. 28 is a cross-sectional view of the support surface similar to the view shown in FIG. 27, with the patient shown positioned on the support surface and the support surface having bottomed out;

FIG. 29 is a perspective view of a conductive fabric that can be used with the touch sensor shown in FIG. 26 to extend the sensing area of the touch sensor over the entire area of the support surface;

FIG. 30 is a cross-sectional view of another embodiment of the support surface shown in FIG. 26 incorporating touch sensors and conductive fabric to detect bottoming of the support surface;

FIG. 31 is a front view of a sensor for detecting bottoming out of a foam surface, showing no load on the foam surface and the sensor in a fully deployed state;

FIG. 32 is a front view of the sensor and foam surface shown in FIG. 31 with a load on the foam surface and the sensor partially collapsed;

FIG. 33 is a front view of the sensor and foam surface shown in FIG. 31 with a load on the foam surface and the sensor fully collapsed to indicate bottoming of the foam surface;

FIG. 34 is a side view of a support surface having a cam assembly at a foot end, wherein the cam assembly operates as a heel suspension mechanism;

FIG. 35 is a side view similar to FIG. 34 with the cam assembly activated to raise the foot end of the support surface;

FIG. 36 is a side view of a support surface having another cam assembly at a foot end, wherein the cam assembly operates as a heel suspension mechanism;

FIG. 37 is a side view similar to FIG. 36 with the cam assembly activated to raise the foot end of the support surface;

FIG. 38 is a side view of a support surface having yet another cam assembly at a foot end, wherein the cam assembly operates as a heel suspension mechanism;

FIG. 39 is a side view similar to FIG. 38 with the cam assembly activated to raise the foot end of the support surface;

FIG. 40 is a side view of a support surface having a plurality of bladders at a foot end, wherein the plurality of bladders operate as a heel suspension mechanism;

FIG. 41 is a side view similar to FIG. 40 with one of the bladders activated to raise the foot end of the support surface;

FIG. 42 is a side view of a support surface having an additional plurality of bladders located at a foot end, wherein the plurality of bladders operate as a heel suspension mechanism;

FIG. 43 is a side view similar to FIG. 42, with one of the bladders activated to raise the foot end of the support surface;

FIG. 44 is a side view of a support surface having an air bag at the foot end, where the air bag operates as a heel suspension mechanism;

FIG. 45 is a side view similar to FIG. 44 with the bladder activated to raise the foot end of the support surface;

FIG. 46 is a side view of a support surface having two air bags located at the foot end, where the two air bags operate as a heel suspension mechanism;

FIG. 47 is a side view similar to FIG. 46 with one of the bladders activated to raise the foot end of the support surface;

FIG. 48 is a side view similar to FIG. 46 with another bladder activated to raise the foot end of the support surface;

FIG. 49 is a side view of a support surface having a foam cleat located at a foot end, where the foam cleat operates as a heel suspension mechanism;

FIG. 50 is a side view similar to FIG. 49 with the foam wedges actuated to raise the foot end of the support surface;

FIG. 51 is a side view of a support surface having another foam cleat located at a foot end, where the foam cleat operates as a heel suspension mechanism;

FIG. 52 is a side view similar to FIG. 51 with the foam wedges actuated to raise the foot end of the support surface;

FIG. 53 is a side view of a support surface having a cut-out at the foot end, where the cut-out operates as a heel suspension mechanism;

FIG. 54 is a side view similar to FIG. 53 with the cut-out activated to raise the foot end of the support surface;

FIG. 55 is a side view of a support surface having another cut-out at the foot end, where the cut-out operates as a heel suspension mechanism;

FIG. 56 is a side view similar to FIG. 55 with the cut-out activated to raise the foot end of the support surface;

FIG. 57 is a side view of a support surface having a jack located at a foot end, wherein the jack operates as a heel suspension mechanism;

FIG. 58 is a side view similar to FIG. 57 with the jack activated to raise the foot end of the support surface;

FIG. 59 is a side view of a support surface having a lifting member at a foot end, wherein the lifting member operates as a heel suspension mechanism;

FIG. 60 is a side view similar to FIG. 59, with the lifting member actuated to raise the foot end of the support surface;

FIG. 61 is a top perspective view of a patient support device according to another embodiment;

FIG. 62 is a top view of the fluid entry detection system shown in FIG. 61;

FIG. 63 is a side sectional view of a mattress according to an embodiment;

FIG. 64 is a top perspective view of the treatment layer of the mattress of FIG. 63, with the mattress connected to a control unit via a hose;

FIG. 65 is a front view of the control unit shown in FIG. 64;

FIG. 66 is a top perspective view of another embodiment of a treatment layer having a blower connected to a control unit;

FIG. 67 is a side cross-sectional view of the mattress shown in FIG. 63 with the treatment layer and protective layer attached to the foam base by fasteners;

FIG. 68 is a side cross-sectional view of another embodiment of a patient support device;

FIG. 69 is a foot end cross-sectional view taken along line 69-69 of FIG. 68;

FIG. 70 is a top schematic view of the flow of gas through the patient support apparatus shown in FIG. 68;

FIG. 71 is a schematic view of the airflow through the patient three-dimensional spacer shown in FIG. 68;

FIG. 72 is a schematic illustration of the pressure in the patient three-dimensional spacer shown in FIG. 68;

FIG. 73 is a top perspective view of the base of the blower assembly housing;

FIG. 74 is a top perspective view of the blower connected to the base of the blower assembly housing shown in FIG. 73;

FIG. 75 is a top perspective view of the blower assembly housing with the cover connected to the base;

FIG. 76 is a side view of the blower assembly housing;

FIG. 77 is a schematic view of a blower assembly connected to a control system;

FIG. 78 is a flow chart of a method for detecting a blockage in a blower assembly;

FIG. 79 is a graph illustrating blower speed during various conditions;

FIG. 80 is a top perspective view of a patient support surface having an X-ray sleeve extending along first and second sides of the support surface;

FIG. 81 is a perspective view of a portion of the X-ray sheath shown in FIG. 80 and showing a zipper that fluidly seals the X-ray sheath to prevent bodily fluids from entering the X-ray sheath;

FIG. 82 is a perspective view of a portion of the X-ray sheath shown in FIG. 80 and showing a liner of the X-ray sheath;

FIG. 83 is a perspective view of a portion of the X-ray sheath shown in FIG. 80 and illustrating a cavity configured to receive an X-ray cassette therein, wherein the X-ray cassette can be placed under the chest, abdomen, or buttocks of a patient on a support surface;

FIG. 84 is a top perspective view of an X-ray sleeve configured for insertion into a mattress;

FIG. 85 is an exploded view of the X-ray sheath shown in FIG. 84;

FIG. 86 is a partial top view of the X-ray sheath of FIG. 84;

FIG. 87 is a cross-sectional view of the X-ray sheath taken along line A-A in FIG. 86;

FIG. 88 is a side view of the X-ray sheath shown in FIG. 84;

FIG. 89 is an enlarged view of area B shown in FIG. 87;

FIG. 90 is a top perspective view of the X-ray sheath shown in FIG. 84 welded into a bottom cover of a mattress;

FIG. 91 is an exploded view of a mattress according to an embodiment and having a blower assembly positioned therein;

FIG. 92 is a front perspective view of the outlet of the blower assembly with the cover disposed on the front face of the outlet;

FIG. 93 is a rear perspective view of the outlet with an opening;

FIG. 94 is a front perspective view of a plug configured to be inserted into an opening formed in an outlet;

FIG. 95 is a front perspective view of the plug disposed within an opening formed in the outlet;

FIG. 96 is a rear perspective view of the plug disposed within an opening formed in the outlet;

FIG. 97 is a front perspective view of an inlet of a blower assembly having a cover disposed on a front face of the inlet;

FIG. 98 is a rear perspective view of the inlet with an opening;

FIG. 99 is a front perspective view of a plug configured to be inserted into an opening formed in an inlet;

FIG. 100 is a front perspective view of a plug disposed within an opening formed in an inlet;

FIG. 101 is a rear perspective view of a plug disposed within an opening formed in an inlet;

FIG. 102 is a top perspective view of a blower assembly according to an embodiment;

FIG. 103 is a schematic diagram of a control circuit for use in a mattress with an air blower according to an embodiment;

FIG. 104 is a top perspective view of a portion of the control circuitry mounted in the housing of the blower;

FIG. 105 is a side perspective view of the power and ground wires extending from the housing of the blower;

fig. 106 is a side view of an overmold formed on a power line;

FIG. 107 is a perspective view of an electrical power cord extending through an umbilical formed in the bottom cover of the mattress; and

fig. 108 is a side, in and out view of an electrical power line extending through an umbilical formed in a bottom cover of a mattress.

Detailed Description

An exemplary patient support device embodied as a hospital bed 10 is shown in fig. 1. The patient bed 10 is shown as a hospital bed; however, it should be understood that the hospital bed 10 may be used in any healthcare facility or home. For example, the hospital bed 10 may be used in a nursing home or in the patient's own home in end-of-care. Additionally, although the description refers to a hospital bed 10, it should be understood that the support surfaces and support devices described herein may be equally applicable to other support devices, such as chairs, wheelchairs, stretchers, and the like. The patient bed 10 comprises a microclimate system 12 mounted on a frame structure 14, the frame structure 14 supporting the microclimate system 12 above the floor 11. The microclimate system 12 is arranged below a patient supported on a patient bed 10. The microclimate system 12 is configured to cool and dry an interface between a patient and the patient bed 10 to promote skin health by moving air along the interface when the patient is supported on the patient bed 10. The microclimate system 12 may include an environmental sensor unit configured to detect information about the environment surrounding the microclimate system 12 in order to adjust the operation of the microclimate system 12 in view of ambient temperature, humidity and/or pressure.

Referring now to fig. 2, a support surface 16 (sometimes referred to as a mattress) is configured to underlie a patient supported on the patient bed 10. An air tank (not shown) may be connected to the support surface 16 to provide conditioned air to the support surface 16 to cool and dry the interface between the patient and the support surface 16 when the patient is supported on the patient bed 10.

Support surface 16 includes a top portion 20 and a lower enclosure 22 that cooperate to enclose a foam shell 24, a foam head portion 26, a foam foot portion 28, a body bladder, and a turning bladder 32, such as shown in fig. 2. In fig. 2, bladder 30 may be a passive pressure redistribution bladder or an active pressure redistribution bladder. In some embodiments, bladder 30 may also include a heel-hanging bladder. The heel suspension feature may be used to replace foam wedges commonly used in healthcare facilities. Other embodiments of the heel suspension feature may include a foldable portion of the foot portion 28. In another embodiment, a cam may be provided to rotate a portion of the foot portion 28 upward to facilitate heel suspension. It is desirable that the turning bladders 32 also be configured as passive pressure redistribution bladders or active pressure redistribution bladders. Passive pressure redistribution systems may use a series of pressure relief valves and foam filled bladders. The top 20 forms a top surface 36 of the support surface 16 and is configured to direct conditioned air provided by the air tank 18 along an interface between the patient and the support surface 16 when the patient is supported on the patient bed 10. The foam members 24, 26, 28 and the bladders 30, 32 cooperate to support a patient when supported on the patient bed 10. In some embodiments, support surface 16 may further include a hood 40 enclosing top 20 and lower enclosure 22, as shown in FIG. 1.

The top 20 illustratively includes a bottom layer 41, a middle layer 42, and a top layer 43, as shown in FIG. 2. Intermediate layer 42 is illustratively a three-dimensional material that allows conditioned air to flow between bottom layer 41 and top layer 43 along top surface 36 of support surface 16 from foot end 21 to head end 31 of support surface 16. The top layer 43 is made of a perforated material that allows moisture from a patient supported on the top 20 to pass through the top layer 43 and be carried away by the conditioned air flowing through the middle layer 42 of the top 20 for evaporation. In other embodiments, other airflow-cooled roofs may be used with support surface 16. For example, an air-dissipative roof, an air-fluidized bead roof, or the like may be used in the support surface 16.

Referring to fig. 3, an air tank or air blower 50 is illustratively adapted to be mounted on the frame structure 14, but may be integrated into the frame structure 14 in other embodiments. If the microclimate system 12 is not required, the cost of the microclimate system 12 may be reduced by providing a separate blower 50. In addition, the external nature of blower 50 allows for packaging of additional features into support surface 16, such as heel suspension, temperature controls, and the like. An air box 50 is connected to the support surface 16 to provide air to the support surface 16. The air tank 18 includes a housing 52 (containing an air handling unit), a connector hose 54, a power cord 56, and a user interface 58. A user interface 58 is connected to the housing 52 and includes an LCD display 60 and has a plurality of buttons. The user interface is described in more detail below. The power cord 56 may be electrically connected to a power source, such as a wall outlet or a power source incorporated into the patient bed 10. The housing 52 houses an environmental sensor unit and an air handling unit. A connector hose 54 extends from the housing 52 to the support surface 16 to connect the air handling unit to the support surface 16. The connector hose 54 is shown as a single hose 54. The connector hose 54 is configured to provide air flow to the microclimate system 12 or the air bags 30, 32. The housing 52 may include a valve system to selectively provide a flow of air to the microclimate system 12 or one of the air bags 30, 32. Alternatively, the connector hose 54 may comprise a plurality of hoses, wherein each hose connects an air handling unit to one of the microclimate system 12, the air bag 30, and the air bag 32.

The interface 80 is provided on the side of the support surface 16 at a position not obstructed by the guard rails of the patient bed 10. Although the display is shown to the side of support surface 16, interface 80 may be positioned anywhere along support surface 16, such as at the foot end of support surface 16. An expanded view of the interface 80 is provided in fig. 4. The interface 80 includes a weight-based numerical control system having an adjustment dial 82 and a plurality of indicators 84 selectable by the adjustment dial. In the exemplary embodiment, indicator 84 includes three weight ranges; however, any number of weight ranges is contemplated. The weight range is related to the weight of the patient. By selecting a weight range corresponding to the weight of the patient, the body bladder 30 is inflated to an appropriate level to provide comfort to the patient. For example, the first indicator 84a provides a range of 32kg to 82 kg. For patients within this weight range, the body bladder may be inflated to a first firmness. The second indicator 84b provides a weight range of 83kg to 159 kg. A patient in this weight range may need to inflate the body bladder 30 to a higher level than the first weight range. That is, when the indicator 84b is selected, the body bladder 30 is inflated to a greater firmness than when the indicator 84a is selected. The third indicator 84c provides a weight range of 159kg to 226 kg. A patient in this weight range may need to inflate the body bladder 30 to a higher level than the second weight range. That is, when the indicator 84c is selected, the body bladder 30 is inflated to a greater firmness than when the indicator 84b is selected. The caregiver can select the appropriate weight range (i.e., indicator 84) before the patient is placed on the support surface 16 or while the patient is on the support surface 16.

The interface 80 also includes an end-of-life indicator 90. The end-of-life indicator 90 includes an "all new" button 92 that can be selected when the support surface 16 is installed in a healthcare facility. By selecting the "new" button 92, the end-of-life meter of the support surface 16 is activated. The end-of-life indicator 90 also includes a meter 94. In an exemplary embodiment, the meter 94 is a liquid crystal display (LED). The meter 94 includes an upper limit 96 and a lower limit 98. When the support surface 16 is first installed and the "all new" button 92 is selected, the meter 94 is activated at the lower limit 98. As the support surface 16 becomes worn, the gauge 94 rises toward the upper limit 96. In some embodiments, the meter 94 is displayed in a different color. For example, the meter 94 may be green when the meter 94 is near the lower limit 98. When the meter 94 is raised to a position between the upper limit 96 and the lower limit 98, for example, midway between the upper limit 96 and the lower limit 98, the meter 94 may yellow. As the meter 94 approaches the upper limit 96, the meter 94 may turn red. When the meter 94 approaches the upper limit 96, the caregiver is alerted that the support surface 16 may have worn.

Several embodiments of end-of-life detectors may be used to determine when the support surface 16 has reached the end of life and signal to the meter 94 what level of use should be displayed. Some of these embodiments are described in more detail below. In some embodiments, the end-of-life detector includes a timer that is activated when the support surface 16 is installed. The timer counts down the life of the support surface 16 for a predetermined time, for example, 3 years, 5 years, and 7 years. For example, an end-of-life detector for a support surface 16 having a 7 year life would indicate that the support surface 16 should be replaced 7 years after the date of installation. Some timers may be electronic, while other timers may include chemicals that erode or grow over time. The chemical may be configured to be completely eroded by the system within a predetermined time from the date of activation of the chemical.

In some embodiments, the timer may be turned on and off. For example, the timer may track the amount of time the couch is in use by tracking when the patient enters and leaves the support surface 16. When a patient is detected on the support surface 16, a timer is turned on to track the amount of usage. When the patient leaves the support surface 16, the timer is turned off. In another embodiment, a timer tracks when the support surface 16 is powered up. For example, when the support surface 16 is plugged into a power source and power is delivered to the support surface 16, the timer switches to an on state to track usage. When the support surface 16 is turned off and no power is received, the timer switches to an off state and ceases tracking the use of the support surface 16 until power is restored.

Fig. 5 shows another embodiment of the support surface 120. The support surface 120 is similar to the support surface 16 and includes several components that are identified by the same reference numerals. The support surface 120 includes a side 122 having an opening 124. The cavity 126 extends from the opening 124 and into the support surface 120. Cavity 126 illustrates thigh portion 130 located at support surface 120; however, in other embodiments, the cavity 126 may be formed in the head portion 132, the seat portion 134, or the foot portion 136 of the support surface 120. The cavity 126 is formed in a portion of the support surface 120 that is accessible to the caregiver to access the cavity 126. Alternatively, the cavity 126 may be formed in the foot end 140 or the head end 142 of the support surface 120. An inlet port 146 (shown in phantom) is received within the cavity 126. In the exemplary embodiment, inlet port 146 extends from a rear wall 148 of cavity 126. The inlet port 146 is in fluid communication with the microclimate system 12. The air flow entering the inlet port 146 is delivered to the microclimate system 12. The inlet port 146 is also in fluid communication with the air bags 30, 32 such that a flow of air entering the inlet port 146 may be delivered to the air bags 30, 32. A valve (not shown) may be disposed downstream of the inlet port 146 to direct the flow of air to one of the microclimate system 12, the air bag 30 or the air bag 32. Alternatively or additionally, the support surface 120 may include a plurality of inlet ports 146, wherein each inlet port 146 is in fluid communication with one of the microclimate system 12, the air bag 30 or the air bag 32.

An air tank or air blower 150 is configured to be disposed within the cavity 126. By locating the blower 150 in the cavity 126, space on the footboard of the patient bed 10 is not required. In addition, the blower 150 may be added only when needed to save money and resources within the healthcare facility. In addition, the blower 150 has a smaller, more compact size, which saves storage space within the healthcare facility. In some embodiments, the blower 150 may be stored in a patient room. Blower 150 may be disposed within cavity 126 when a patient is positioned on support surface 120. The blower 150 includes an outlet port 152. In some embodiments, the blower 150 may include a plurality of outlet ports 152. Blower 150 is configured to be inserted into cavity 126 such that outlet port 152 is fluidly connected to inlet port 146. Optionally, a plurality of outlet ports 152 are fluidly connected to a plurality of inlet ports 146. The blower 150 controls the flow of air from the outlet port 152 into the inlet port 146 and ultimately into the microclimate system 12, the air bags 30 and 32. In embodiments having multiple outlet ports 152, the blower 150 may have a valve to control the flow of air to one of the outlet ports 152, thereby controlling the flow of air to one of the microclimate system 12, the air bag 30, or the air bag 32.

When the patient requires additional treatment, a blower 150 may be inserted into the cavity 126 to provide a flow of air to the microclimate system 12, the air cells 30 and the air cells 32. Blower 150 is shown with power cord 156 plugged into a wall outlet. In some embodiments, the blower 150 may be battery powered. In other embodiments, the blower 150 may be electrically connected to the support surface 120 when the blower 150 is inserted into the cavity 126. This connection may be made by a plug on the blower 150 engaging an output port in the cavity 126 when the blower 150 is inserted into the cavity 126. If the patient does not require treatment, blower 150 may be removed from cavity 126. In one embodiment, the walls of the cavity 126 are formed of a rigid material that can maintain the shape of the cavity 126 even if the patient is on the support surface 120. That is, the cavity 126 remains open and does not collapse. In some embodiments, cavity 126 may be filled with, for example, a foam block when blower 150 is not in use.

The blower 150 includes an interface 160 that enables a caregiver to control the operation of the blower 150. Examples of interfaces for blowers are provided below. The support surface 120 also includes an end-of-life indicator 90 that operates as described above. In some embodiments, operating the blower 150 may affect the life of the support surface 120. Thus, the end-of-life detector of the end-of-life indicator 90 may track the usage of the blower 150. For example, the end-of-life detector may include a timer that is activated when the blower 150 is installed within the cavity 126. The timer may stop when the blower 150 is removed from the cavity 126.

Referring to fig. 6, a patient support surface 200 similar to patient support surface 16 is provided. Components of the patient support surface 200 are labeled with the same reference numerals as those described for the patient support surface 16. The patient support surface 200 includes an air box or air blower 202 disposed within the patient support surface 200. The blower 202 is fluidly connected to the microclimate system 12 and the air bags 30, 32. As described above, a valve may be provided within the blower 202 or within the microclimate system 12 to control the flow of air to one of the microclimate system 12, the air bag 30 or the air bag 32. In some embodiments, the blower 202 is permanently housed in the support surface 200 and is configured to be discarded or recycled when the support surface 200 is replaced. In some embodiments, the blower 202 is accessible through an opening in the support surface 200 to provide maintenance to the blower 202 and/or to replace the blower 202 when the blower fails before the end of the life of the support surface 200. In some embodiments, when the support surface 200 reaches the end of its life, the blower 202 may be removed from the support surface 200 and reused in a new support surface 200.

By integrating the air mover 202 into the support surface 200, the microclimate system 12 is made available in all support surfaces 200, thereby eliminating the need for a caregiver to find an inventory of air movers. Additionally, the blower 202 is not lost within the healthcare facility, thereby reducing inventory and increasing costs. With the blower 202 built into the support surface 200, the patient does not need to wait for the blower 202 to receive treatment. Further, an end-of-life indicator that operates according to usage (e.g., tracking usage when the system is powered on) will automatically begin tracking usage when the support surface 200 is powered on, rather than requiring a blower to be added to the support surface 200. The blower 202 also avoids contamination during use because the blower 202 is incorporated into the support surface 200 and not exposed to the healthcare facility. In addition, the blower 202 provides low noise operation because noise from the blower 202 is filtered by the foam and air pockets within the support surface 200.

In some embodiments, an interface 204 may be provided on a side 206 of the support surface 200 to enable a caregiver to control the blower 202. Another interface 210 is disposed on the side 206 of the support surface 200. Referring to FIG. 7, the interface 210 includes an adjustment dial 82 and a plurality of indicators 84 that are selectable by the adjustment dial 82, as described above. Interface 210 is shown without an end-of-life indicator; however, it should be understood that the interface 210 may include an end-of-life indicator as shown in the interface 80 described above.

Referring to fig. 8, a controller 220 is provided that may be used with any of the support surfaces described herein. The controller 220 is configured to control the microclimate system 12. Controller 220 is disposed on a power cord 222, such as the power cord of any blower described herein or the power cord of any support surface described herein. The controller 220 is configured to be operated by a caregiver or a patient. That is, the controller 220 may be configured to be within reach of the patient when the patient is supported on the support surface. The controller 220 may include a gauge 224 that indicates the remaining life of the support surface 200. The gauge 224 may include a plurality of LED color bars 226 that indicate the remaining life of the support surface. For example, the gauge 224 may include eight bars 226 that are all illuminated green when the support surface 200 has a first predetermined life remaining. As the lifetime decreases, fewer bars 226 may be illuminated. By way of example, the bar 226 may be illuminated yellow when only 4-5 bars 226 are illuminated corresponding to a second predetermined lifetime remaining less than the first predetermined lifetime. As another example, a bar 226 may be illuminated red when only 3 bars 226 or fewer bars 226 are illuminated corresponding to a third predetermined lifetime that is less than the second predetermined lifetime. When only one bar 226 is illuminated, the bar may blink red.

The controller 220 can include a power switch 228 to turn the microclimate system 12 on and off. The power switch may be a push button switch but may take the form of any switch. The intensity button may enable a user to control the intensity of the microclimate system 12. That is, the amount of airflow from the microclimate system 12 may be increased or decreased by a button. A meter may be provided to indicate the current intensity of the microclimate system 12. The meter may only be visible when the microclimate system 12 is on. Additionally, the meter may include various colors to display the intensity of the microclimate system 12. For example, when the microclimate system 12 is set at a low airflow, the meter may illuminate 1-5 green bars. When the airflow increases, the meter may illuminate another 1-4 yellow bars. When the airflow is further increased, the meter may illuminate another 1-3 red bars. Thus, the intensity of the microclimate system 12 may be indicated by the number of illuminated bars and the color of the bars. In some embodiments, the meter may include only a plurality of bars. In some embodiments, the meter may include only a plurality of colors. In further embodiments, the meter may have a digital indicator.

The support surface 250 is shown in fig. 9. The support surface 250 includes components identical to those of the support surface 16 and designated by the same reference numerals. The support surface 250 is disposed on a frame 252 having a foot end 254. An air box or air blower 260 is connected to the foot end 254. The blower 260 is removably connected to the foot end 254. In some embodiments, the blower 260 may be connected to the side rails 256 of the frame 252. The blower 260 is fluidly connected to the microclimate system 12 and the air bags 30, 32 by a hose 262. As described above, a plurality of hoses 262 may connect the blower 260 to the microclimate system 12 and the air bags 30, 32. Optionally, the blower 260 and/or the support surface 250 may include at least one valve to direct the flow of air from the blower 260 to the microclimate system 12, the air bag 30, or the air bag 32. The blower 260 also includes a power cord 264, which is shown to electrically connect the blower 260 to a power source on the frame 252. Alternatively, the power cord 264 may be electrically connected to a wall outlet.

The blower 260 includes a housing 270. Power cord 264 and hose 262 extend from housing 270. The housing 270 includes an interface 280 that may be used by a caregiver to control the blower 260. Through the interface 280, the caregiver can control the flow of air to the microclimate system 12, the air cells 30, and the air cells 32. Although shown for use with support surface 250, interface 280 may be used with any of the support surfaces described or illustrated herein. The interface 280 may be incorporated into any of the blowers and/or any of the support surfaces described or illustrated herein.

As shown in fig. 10, the interface 280 may include a screen 282, such as an LED screen. In the illustrated embodiment, the screen 282 is a touch screen that enables the caregiver to select from a variety of operating settings. Screen 282 includes buttons 284 to control the pressure of the body bladders. The buttons 284 enable alternating pressure changes within the body bladder 30. That is, the blower 260 alternately inflates and deflates the body bladder 30 to increase and decrease the air pressure within the body bladder 30, thereby increasing and decreasing the stiffness of the support surface 250. By alternating the pressure within the body bladder, the likelihood of a patient acquiring a pressure ulcer may be reduced. In some embodiments, blower 260 gradually increases the pressure of body bladder 30 and then gradually decreases the pressure of body bladder 30. In other embodiments, the increase and decrease in pressure may occur more quickly to provide pulsation to the patient. In some embodiments, all of the body bladders 30 are inflated and deflated simultaneously, while in other embodiments, some of the body bladders 30 are inflated and others are deflated to cause the patient to rotate. The button 284 may turn on a second screen that enables the caregiver to select a particular pressure level and/or control the pressure within the body bladder 30.

A button 286 is provided to control the microclimate system 12. For example, the button 286 may turn the microclimate system 12 on and off. Alternatively, the button 286 may turn on a microclimate screen that enables a caregiver to select the amount of airflow through the microclimate system 12. By selecting the button 286, the blower 260 is activated to discharge a flow of air to the microclimate system 12 to prevent drying of the skin of the patient in vulnerable areas (e.g., areas where pressure ulcers may grow).

The button 288 activates maximum inflation of the support surface 250. By selecting the maximum inflation operation, all of the body cells 30 are inflated to the maximum capacity. Additionally, the bladder 32 may also be inflated to a maximum capacity. When bladder 30 is at its maximum capacity, support surface 250 is at its maximum firmness, which aids the caregiver in repositioning the bed.

The button 290 enables comfort adjustment operation of the support surface 250. The activation button 290 may activate a comfort screen that enables the caregiver to selectively inflate and deflate the body bladder 30. The body bladder 30 can be adjusted according to the area of the support surface 250. That is, the head, torso, seat and foot portions of the support surface 250 may be individually controlled such that each portion is inflated or deflated to a different pressure. For example, the head portion of the support surface 250 may be inflated while the seat portion is deflated for patient comfort, thereby raising the patient's head. Likewise, the foot portion may be inflated to a greater volume than the seat portion to elevate the patient's feet. In some embodiments, the balloon 32 may be inflated or deflated to turn the patient to one side.

The CPR button 292 activates the CPR function of the support surface 250. As with button 288, CPR button 292 inflates all balloons 30 to maximum pressure. However, the CPR button 292 also serves to stop all other treatments currently being performed in the support surface 250 (e.g., microclimate system 12, heater) as well as any treatments that may vibrate or pulsate the support surface 250. By inflating the balloon 30 to maximum pressure, the support surface 250 is at maximum stiffness, which is ideal for performing CPR on a patient.

A portion of the screen 282 also includes an on button 300 and an off button 302 for the patient hanger (described in more detail below). When the on button 300 is selected, the patient hanger enables the patient to individually control various comfort features of the support surface. When the off button 302 is selected, the patient hanger is disabled and the patient cannot control any support surface functions.

The back button 304 returns the interface 280 to the screen 282 if the interface has changed to a different screen as described above. The alarm button 306 alerts other caregivers, such as at a nurse station, of an emergency. Such emergencies may include a patient who is calling, a patient who has a severe response to a drug or the like, a patient who is getting worse, a patient who becomes violent, and the like. The setup button 308 activates a setup screen that enables the caregiver to change various settings of the interface 280, the support surface 250, or any other device connected to the support surface 250.

An exemplary patient hanger 320 is shown in fig. 11 and includes a support surface firmness control 322. The firmness controller 322 controls the amount of pressure in the body bladder 30 by inflating or deflating the body bladder 30. Button 324 is provided to increase the pressure of body bladder 30 by providing additional air flow from blower 260 to body bladder 30. Another button 326 is provided to reduce the pressure of the body bladder 30 by releasing air from the body bladder 30. Button 324 includes a plus sign and button 326 includes a minus sign. The gauge 328 displays the current hardness of the support surface 250. The meter 328 includes a plurality of bars 330 that are illuminated, for example using LEDs, to display the current firmness. If none of the bars 330 are illuminated, the support surface 250 is at the lowest level of hardness. When the button 324 is activated, the number of illuminated bars 330 increases corresponding to the amount of pressure increase. If all of the bars 330 are illuminated, the support surface 250 is at its maximum stiffness. When the button 326 is activated, fewer bars 330 remain illuminated to correspond to the decrease in pressure.

The hanger 320 also includes an alternating pressure controller 340. The alternating pressure controller 340 controls the variation of pressure within the body bladder 30 in connection with the alternating pressure function described above. The alternating pressure controller 340 can control the rate at which the body bladder 30 pressure alternates. The alternating pressure controller 340 may also control the pressure change between maximum inflation and maximum deflation. By activating the alternating pressure control 340, a minimum setting, a normal setting, or a maximum setting may be selected. The selected setting is indicated by one of three Lights (LEDs) 342 provided alongside the alternating pressure controller 340. Lamp 342a represents the minimum setting, lamp 342b represents the normal setting, and lamp 342c represents the maximum setting. In some embodiments, the maximum setting alternates between inflation and deflation faster than the normal setting, and the normal setting alternates between inflation and deflation faster than the minimum setting. In some embodiments, the maximum setting uses a greater pressure range for inflation and deflation than the normal setting, and the normal setting uses a greater pressure range for inflation and deflation than the minimum setting.

The sleep mode button 350 positions the support surface 250 in a comfortable sleep position. For example, the sleep mode button 350 may inflate and deflate certain body bladders 30 to comfortably set the patient for sleep. In some embodiments, the sleep settings are patient specific and are tailored to the patient's requirements at the time allowed by the patient. In some embodiments, the sleep mode button 350 may also raise and lower portions of the bed, for example, the head portion or the foot portion.

Referring to fig. 12, another patient hanger 370 enables a patient to control various features of the support surface 250. The massage controller 372 includes an activation button 374. Selecting the activation button 374 cycles the massage controller 372 between vibration, pulsing, and off. For example, a first press of the button 374 activates a vibration mode in which the body bladder 30 vibrates by the rapid air flow. When the vibration mode is selected, the illuminated indicator 378 indicates the vibration mode. A second depression of the button 374 activates a pulsing mode in which the air flow pulses through the body bladder 30. When the pulsing mode is selected, the illuminated indicator 380 indicates the pulsing mode. Pressing the button 374 a third time deactivates the massage control and both the indicator 378 and the indicator 380 become unlit. The intensity of the massage controller can be varied by an increase button 382 and a decrease button 384, where the increase button 382 increases the rate of vibration or pulsing and the decrease button 384 decreases the rate of vibration or pulsing. The LED meter 386 indicates an intensity level between a maximum intensity 388 and a minimum intensity 390.

The microclimate controller 400 switches the microclimate system 12 between various intensities. In some embodiments, the microclimate control 400 is activated only when a caregiver activates the microclimate system 12, for example, from the slave interface 280 described above. In some embodiments, the patient may activate the microclimate system 12 with the microclimate control 400. That is, activating the microclimate control 400 may activate the microclimate system 12, and then, following the patient switching through each intensity level, activating the microclimate control 400 allows the patient to switch intensity levels before deactivating the microclimate system 12. For example, the first press of the microclimate controller 400 causes the microclimate system 12 to be at a minimum intensity, as indicated by light 402, wherein the microclimate system 12 provides a low level of airflow to the patient. A second depression of the microclimate controller 400 places the microclimate system 12 in normal operation as indicated by light 404. Pressing the microclimate controller 400 a third time places the microclimate system 12 at a maximum intensity, as indicated by light 406, and wherein a maximum amount of air flow is provided to the microclimate system 12. In embodiments where the caregiver must activate the microclimate system 12, pressing the microclimate controller a fourth time returns the microclimate system 12 to a minimum intensity. In another embodiment, pressing microclimate control 400 a fourth time may deactivate microclimate system 12.

Foot heating button 410 activates foot heater 412 within support surface 250. The foot heater 412 is shown in fig. 9 as being incorporated into the support surface 250. However, foot heater 412 may be an additional component that is positioned on support surface 250. In some embodiments, the support surface 250 includes other heaters, such as a seat heater and/or a back heater. Any heaters incorporated into the support surface 250 may be controlled by a patient hanger, such as hanger 370, for example, indicator 414 may be illuminated when the foot heater is activated. In some embodiments, the hanger 370 may be used to control the intensity of heat from the foot heater from low heat to high heat.

In fig. 13, compression sleeve 450 is connected to blower 260 via hose 452. A compression sleeve 450 is shown on the patient's leg to prevent blood clots and/or pressure ulcers in the patient's leg. The compression sleeve 450 includes a right sleeve 454 and a left sleeve 456. When the compression sleeve 450 is connected to the blower 260, an icon or button 460 appears on the interface 280, as shown in FIG. 14. Selecting icon 460 activates a compression screen 462 on interface 280. The compression screen 462 shows the right sleeve 454 and the left sleeve 456. Through screen 462, the caregiver can vary the pressure applied to cannula 450. In some embodiments, a selected pressure is applied to the right sleeve 454 and the left sleeve 456. In some embodiments, different pressures may be applied to the right sleeve 454 and the left sleeve 456. Each sleeve 454 and 456 includes a number of regions 470, such as a thigh region 472, a first calf region 474, a second calf region 476, and a calf region 478. In some embodiments, each zone 470 may be supplied with the same pressure. In other embodiments, the regions 470 may each be supplied with a different pressure depending on the needs of the patient.

Referring to fig. 15, a weight scale 500 is incorporated into a support surface 250. The weight scale 500 may be positioned within the support surface 250. Alternatively, the weight scale 500 may be positioned below the support surface 250. The weight scale 500 includes a load cell 502 that monitors the weight of the patient on the support surface 250. Load cell 502 is electrically connected to transmitter 504. The transmitter 504 is wirelessly connected to the interface 280. When the weight scale 500 is in operation, the transmitter 504 sends a signal to the interface 280 indicative of the weight measured by the load cell 502. The transmitter 504 may include a radio frequency identification tag to identify the support surface 250 at a remote location or at the interface 280. In some embodiments, the transmitter 504 may communicate with the cloud server through a wireless connection, bluetooth connection, or other wireless functionality. As shown in fig. 16, the interface 280 includes a screen 506, the screen 506 enabling an operator to control the weight scale 500. Icon 510 allows the caregiver to wirelessly connect interface 280 to weight scale 500 so that interface 280 can receive signals from weight scale 500. Icon 512 synchronizes the interface with the weight scale 500 to receive a signal from the transmitter 504 indicative of the patient's weight. When a signal is received from the transmitter 504, the screen 506 displays the weight of the patient. Screen 506 also displays the date and time the signal was received.

As described above, some end-of-life indicators may track the use of a support surface, such as support surface 250, based on the amount of time that support surface 250 is in use. In some embodiments, the weight scale 500 may detect that the patient is on the support surface 250. The weigh scale 500 then sends a signal to the end-of-life indicator instructing the end-of-life indicator to begin tracking time with a timer. When weight scale 500 detects that the patient is no longer on support surface 250, weight scale 500 sends a signal to the end-of-life indicator instructing the end-of-life indicator to stop the timer. In one example, the life of the support surface may be three years. Thus, if the weight scale 500 detects that the patient has been on the support surface for 2 hours, the end-of-life indicator reduces the remaining life of the support surface 250 by 2 hours. That is, by communicating with the weight scale 500, the end-of-life indicator tracks actual use of the support surface 250 and alerts the caregiver when use reaches a predetermined time. In some embodiments, the end-of-life indicator may also take into account the weight of the patient when determining the remaining useful life of the support surface 250. For example, the support surface 250 may have a service life of 7 years for patients under 200 pounds and only 5 years for patients over 200 pounds. By receiving a signal indicative of the patient's weight, the end-of-life indicator may more accurately determine the remaining life of the support surface 250.

The weight scale 500 provides an upper and lower bed feature that can be used in conjunction with caregiver input to track the use of the support surface 250. The bed signal from the weight scale triggers a continuous timer that is started and will operate as long as the patient is on the support surface 250. The timer times out when a bed exit signal is transmitted from the weigh scale 500. In some embodiments, the weight scale 500 also determines the weight of the patient. In other embodiments, the patient weight may be entered by a caregiver. The support surface area occupancy is recorded along with the patient's weight to provide a use case. The use case provides the healthcare facility with actual use data that can be used to determine surface performance trends of the support surface over time.

As shown in fig. 17, the emitter 520 is disposed with the support surface 250. Transmitter 520 may be a near field communication device or any other transmitter capable of wirelessly communicating with interface 280. In some embodiments, transmitter 520 may also communicate with a remote center, such as a nurse's station. The transmitter 520 is electrically connected to an end-of-life indicator associated with the support surface 250. As described herein, the end-of-life indicator may be a weigh scale 500, an electronic timer, and/or a chemical timer as described in fig. 15. In some embodiments, an electronic timer and/or a chemical timer may count down the useful life of the support surface 250. In other embodiments, the electronic timer may track the amount of time the patient is on the support surface 250. In yet another embodiment, the electronic timer may track the amount of time that the support surface 250 receives power from a power source or the amount of time that the support surface 250 is turned on.

The transmitter 520 is configured to communicate with the end-of-life indicator to receive a signal indicative of the remaining useful life of the support surface 250. The transmitter 520 is also configured to wirelessly communicate with the interface 280 to display a warning regarding the remaining useful life of the support surface 250. The transmitter 520 may include a radio frequency identification tag to identify the support surface 250 at a remote location or at the interface 280. In some embodiments, the transmitter 520 may communicate with the cloud server through a wireless connection, bluetooth connection, or other wireless functionality. For example, interface 280 may have a screen 522 as shown in FIG. 18. Screen 522 includes a wireless connection button 524 that can be activated to communicatively connect interface 280 to transmitter 520. That is, button 524 may be activated such that interface 280 begins to receive wireless signals from transmitter 520. In other embodiments, the interface 280 remains in continuous communication with the transmitter 520 when both the interface 280 and the transmitter 520 are powered. When the emitter 520 is in communication with the interface 280, the screen 522 displays an icon 526 indicating the remaining life of the support surface 250 as determined from the signal from the emitter 520.

Fig. 18 shows a warning that the support surface 250 is approaching the end of its useful life. The warning may be displayed when the support surface 250 has a predetermined remaining useful life, such as 1 year, 6 months, etc. In some embodiments, the icon 526 may display the estimated remaining life as a numerical value. For example, the icon 526 may display the words "7 years," "5 years," "6 months," and so on. Alternatively or additionally, the icon 526 may display a color that indicates the remaining life. For example, green may indicate that the support surface 250 has a remaining useful life of more than 5 years, yellow may indicate that the support surface 250 has a remaining useful life of 1 to 5 years, and red may indicate that the support surface 250 has a remaining useful life of less than 1 year. In some embodiments, numbers may be used in conjunction with color. In yet another embodiment, the icon 526 may display a gauge indicating the remaining useful life of the support surface 250. The meter may be used in combination with numbers and/or colors. In some embodiments, the screen 522 may display the predicted age of the support surface 250 based on usage, actual age of the support surface 250, date of manufacture, date of installation, fault code, error message, and/or usage data (e.g., number of uses, average patient weight, patient weight average, average usage time, and/or usage time average).

In some embodiments, the serial number of the support surface 250 is recorded at the time of manufacture. This number is then stored and made available to the healthcare facility so that the healthcare facility can track the use of the support surface 250. Once the support surface 250 receives power, for example, the support surface is plugged into a power source or turned on, a continuous timer tracks the time the support surface 250 is in use. Once the support surface 250 is powered down, e.g., unplugged or turned off, the timer is stopped and the total usage time is recorded. The total usage time is associated with the serial number and data relating to the total usage is transmitted to the healthcare facility's remote center, which enables the usage data for all support surfaces 250 to be associated with the support surface 250 serial number and recorded by the healthcare facility.

Referring to fig. 19, an end-of-life indicator 540 is incorporated into the top surface 542 of the support surface 250. The end-of-life indicator 540 is configured to change the color of the top surface 542 to indicate the remaining life of the support surface 250. For example, as a new support surface 250, the top surface 542 may be blue. As the support surface 250 ages, the top surface 542 may change to a light blue color, indicating a warning. When the support surface 250 has reached the end of its life, the top surface 542 may become gray. In some embodiments, other colors may be provided, such as green, yellow, and red. In some embodiments, the top surface 542 remains blue for longer than a first predetermined remaining useful life, such as longer than 5 years. The top surface 542 may turn bluish when the remaining useful life is between the first predetermined remaining useful life and the second predetermined remaining useful life, for example, between 1-5 years. The top surface 542 may be grayed out when the remaining useful life is less than a second predetermined remaining useful life, such as less than 1 year.

In some embodiments, the top surface 542 is filled with a base chemical that changes color when exposed to a catalyst. Upon installation of the support surface 250, the seal is broken to release the catalyst into the top surface 542, thereby mixing the catalyst with the base chemical. Due to the chemical nature, the base chemical changes color over time. For example, the base chemical may be configured to change color completely over a 7 year span. Thus, by monitoring the color of the top surface 542, the remaining life of the support surface over the course of 7 years can be determined. In other embodiments, the chemical may change color in a different time span, such as 5 years, thereby changing the time span that indicates the remaining life of the support surface 250. The chemicals may be selected based on the expected life of the support surface 205. For example, if the expected lifetime of the support surface 250 is 5 years, then a chemical may be selected that changes color within 5 years. In some embodiments, the chemical erodes over time. In some embodiments, the chemical grows over time.

In some embodiments, the top surface 542 includes a filament, such as a liquid crystal, that can be controlled to display various colors. In such embodiments, the support surface 250 may include a weight scale and/or an electronic timer, as described above. Based on signals from the weigh scale and/or the electronic timer, the color of the filament may be changed to indicate the remaining life of the support surface. As described above, such a display may include a color scheme of green, yellow, and red. It should be understood that any color scheme may be used.

It may be desirable for the support surface 250 to include an end-of-life indicator 270 on a side 272 of the support surface 250, as shown in fig. 20. The end-of-life indicator 270 is positioned on a side 272 of the support surface 250. The surface 250 leaves the end-of-life indicator 270 unobstructed by the guardrail 256. The end-of-life indicator 270 is positioned such that the end-of-life indicator 270 is visible to the caregiver. As shown in fig. 21, the end-of-life indicator 270 includes a meter 274. The meter 274 may be activated chemically, as described above. In some embodiments, the meter 274 may be electrically activated by an LED or the like and display input from a weight scale or electronic timer.

The meter 274 includes a series of markings 276, shown as 5 years, 4 years, 3 years, 2 years, and 1 year. It should be understood that the meter 274 may display other time spans. As the remaining life of the support surface 250 decreases, the color bar 278 of the meter 274 drops. That is, the color bar 278 starts at the 5 year mark 276 and after 1 year of use, the color bar drops to the 4 year mark 276, and so on. The color bar 278 continues to descend corresponding to the elapsed time during the entire life of the support surface 250 until the color bar 278 goes out at 0 years indicating that the support surface 250 should be replaced. In some embodiments, the color bar 278 may also change color. For example, at the 5 year marker 276, the color bar 278 may be green; at the 3 year marker 276, the color bar 278 may be yellow; and at the 1 year mark 276, the colored bar 278 may be red.

Referring to fig. 22, the support surface 600 includes a head end 602, an opposite foot end 604, a right side 606, and a left side 608. An X-ray cassette enclosure 620 is disposed within the support surface 600 and is configured to receive an X-ray cassette 622. Sleeve 620 is sealed with zipper 624. In some embodiments, a fastening mechanism other than zipper 624 may be used, such as hook and loop fasteners or the like. The zipper 624 extends along the entire length 626 of the head end 602. Zipper 624 also extends partially along a length 628 of right side 606 and partially along a length 628 of left side 608.

As shown in fig. 23, the support surface 600 includes an upper enclosure 640 sealed to a lower enclosure 642 by a zipper 644. The zipper 644 may be actuated to separate the upper enclosure 640 from the lower enclosure 640 to expose the interior of the support surface 600, such as the air bags and other components described above. Zipper 624 is positioned between upper enclosure 640 and zipper 644. In some embodiments, zipper 624 is a different color than zipper 644 to distinguish the attachment of sleeve 620 to the enclosure. In some embodiments, zipper 624 and zipper 644 may have different dimensions to distinguish zipper 624 from zipper 644.

Fig. 24 and 25 show sleeve 620 in an open configuration, which enables insertion and removal of cartridge 622. Sleeve 620 includes an opening 650 that is sealed by zipper 624. The cavity 652 extends from the opening 650 into the support surface 600. Cavity 652 is configured to receive cartridge 622. The opening 650 extends partially along both sides 606, 608 of the support surface 600 and completely along the head end 602 of the support surface 600 to provide access to the sleeve 620 by the caregiver. In some embodiments, a caregiver can insert cassette 622 and remove cassette 622 from holster 620 while a patient is positioned on support surface 600.

Sleeve 620 includes an inner liner 660, liner 660 bonded or welded to tear resistant material 662 of zipper 624 to seal sleeve 620. In some embodiments, the liner 660 is welded by ultrasonic welding or radio frequency welding. The liner 660 is formed of a water resistant material, such as a thermoplastic. When zipper 624 is closed, sleeve 620 is fluidly sealed to prevent fluids, such as bodily fluids, from entering sleeve 620. Thus, jacket 620 prevents cartridge 622 from being exposed to fluids that could damage the cartridge.

The sleeve 620 can be opened on three sides to allow the sleeve 620 to be wiped without having to remove the support surface 600 in use. The caregiver can access the sleeve 620 from the right side 606, the left side 608, or the head end 602. In addition, the sleeve 620 is larger than conventional sleeves, which allows full coverage from the patient's head to the patient's seat/buttocks and allows X-ray irradiation of the chest, abdomen and buttocks. In some embodiments, the sleeve 620 may extend all the way to the foot end 604 of the support surface 600. Since the sleeve 620 is placed over the core of the support surface 600, the sleeve 620 does not interfere with the microclimate system that may be bonded to the support surface 600. The two separate compartments (sleeve 620 and core) of the support surface 600 enable each compartment to receive a fully enclosed fire sock, thereby enabling the support surface 600 to pass a flame test. The sleeve 620 may be mounted in the support surface 600 with or without a top.

As shown in fig. 26 and 27, the support surface 700 includes a touch sensor 716 connected to an electronic controller 704. A base foam 710 is provided and a plurality of air bladders 712 are positioned above the base foam 710. The upper enclosure 714 of the support surface 700 extends throughout the air bag 712. The patient is configured to lie on the upper enclosure 714. Capacitive touch sensor 716 is positioned between matrix foam 710 and air bladder 712. The touch sensor 716 may be used to detect when the patient is within one inch of the touch sensor 716. The touch sensor 716 is a capacitive charge sensor that functions as a switch that signals when it is touched or a human body is within one inch of the touch sensor 716. Touch sensors can detect through plastic, glass, paper, or fabric. Thus, the touch sensor 716 is capable of detecting through air, air bags, and enclosure materials. Conductive material may also be attached to the sensor to increase the sensing area. The touch sensor 716 may be positioned only under the entire area of the support surface 700, or may be positioned in an area where the patient may bottom out.

When the patient is not within one inch of the touch sensor 716, the touch sensor communicates a first voltage to the electronic controller 704. As shown in fig. 28, the weight of the patient causes the air bladder 712 to deform and bottom out. The patient's sacrum 718 is shown within one inch of the touch sensor 716. Accordingly, touch sensor 716 sends a second voltage, e.g., 5V, to electronic controller 704. Upon receiving the second voltage, the electronic controller 704 sends an audible or visual alarm to the caregiver indicating that the patient has bottomed out.

The touch sensor 716 may monitor the patient to determine whether the patient has bottomed out, e.g., contacted or proximate to the base foam 710. The touch sensor 716 enables the caregiver to perform a "hand check" without having to actually place their hands under the patient. This provides greater comfort to the patient, who does not need unnecessary contact by the caregiver. In some embodiments, if the patient has bottomed out, an alarm may be audibly or visually alerted to the caregiver.

Fig. 29 shows a conductive fabric 720 configured for use with touch sensor 716. Referring to fig. 30, support surface 700 includes fabric 720 and touch sensors 716. The fabric 720 is positioned below the upper enclosure 730 of the support surface 700. A spacer 732 is positioned between the upper enclosure 730 and the fabric 720 to isolate the patient from the fabric 720. Air bladder 712 is positioned between touch sensor 716 and fabric 720. Touch sensor 716 is positioned above matrix foam 710. When a load 734 is applied to the support surface 700, the fabric 720 is moved proximate to the touch sensor 716. Fabric 720 is configured to activate touch sensor 716 when fabric 720 is within 0.5 inches of touch sensor 716. When fabric 720 is within 0.5 inches of touch sensor 716, touch sensor 716 sends a voltage to electronic controller 704 indicating that support surface 700 has bottomed out.

When bottoming is detected, the support surface 700 may be pressure regulated with bladder 712 to lift the patient from the base foam. Additionally, by knowing the weight of the body that the bearing support surface 700 can bear, the surface bladder pressure can be optimized to the ideal interface pressure without risking bottoming. If the bottoming out condition cannot be corrected by adjusting the pressure of bladder 712, an alarm may be sent to the caregiver or nurse station. Further, repeated bottoming may be an indication that the support surface 700 has worn away. In this way, touch sensor 716 helps determine the end of life of support surface 700.

Fig. 31-33 illustrate another sensor 750 for determining support surface bottoming. The sensor 750 is positioned within a gap 752 formed in a foam surface 754, such as a foam support surface. A gap 752 is formed at about the bottom inch of the foam surface 754. If the bottom inch of the foam surface 754 collapses, the patient may be determined to have bottomed.

The sensor 750 may include a pair of resilient metal conductors 756 and 758 that are disposed on a top 760 of the gap 752 and a bottom 762 of the gap 752, respectively. The conductors 756, 758 may be spaced apart from each other by an insulator. The conductors are adapted to contact each other when at least a portion of the patient is bottoming. Sensor 750 may also include a waterproof flexible enclosure that encloses conductors 756, 758. It will be readily appreciated that when the patient is lying in bed, the sensor 750 will be compressed. Compression of sensor 750 may result in contact at one or more locations between conductors 756, 758, thereby resulting in an electrical indication that the patient has bottomed out. Fig. 31 shows the gap 752 in an expanded configuration. In fig. 32, the gap 752 is shown as beginning to collapse. In fig. 33, the gap 752 is completely collapsed. As the gap collapses, the conductors 756, 758 approach each other, thereby generating an electrical signal. As the conductors 756, 758 approach each other, the signal increases. When the predetermined signal is reached, the foam surface 754 is considered to have bottomed out. At this stage, the caregiver receives an alert that the patient has bottomed. Bottoming may also indicate that the foam surface 754 has reached the end of its life.

The embodiment depicted in fig. 34-60 provides a support surface with a heel suspension mechanism built into the support surface. In such an embodiment, the caregiver does not have to position and place a separate heel wedge for the support surface. The heel-hanging mechanism described herein eliminates the need to create a temporary-to-go heel-hanging solution if the cleats cannot be positioned. The mechanism also eliminates the time it takes to search for missing parts and allows more attention to patient care. The heel suspension mechanism described herein may be optimized to properly mate with any support surface with which it is integrated. For example, the heel suspension mechanisms described herein may be used with any of the support surfaces described herein. The mechanism improves the cleaning of the support surface as it can be fully integrated within the support surface cover. In addition, this mechanism eliminates the cost of replacing a lost heel wedge.

Referring to fig. 34, a patient support surface 800 includes a body 802 having a body portion 804 and an opposing foot portion 806. The patient support surface 800 may be a foam mattress or an air mattress. In some embodiments, the patient support surface 800 may be any of the support surfaces described in fig. 1-33. Top surface 808 extends from body portion 804 to foot portion 806. Top surface 808 is positioned at a first height 810 from a bottom 812 of support surface 800. Patient 820 is configured to rest on top surface 808 with their feet 822 resting on foot portion 806 of support surface 800. Heel suspension mechanism 824 is positioned within foot portion 806 to vary the height of top surface 808. By varying the height of top surface 808, heel 826 of patient's foot 822 is separated from top surface 808 by gap 828 (as shown in FIG. 35).

Heel suspension mechanism 824 includes a plate 838, with a plurality of recesses 840 formed in plate 838. It should be noted that only one side of the support surface 800 is shown; however, it should be understood that the support surface 800 may include panels 838 on both sides thereof. Optionally, a plurality of panels 838 may be positioned between the sides of the support surface 800. In the illustrated embodiment, the plate 838 includes three recesses 840a-840 c; however, any number of grooves 840 are contemplated. Each of the recesses 840a-840c is positioned below one of three corresponding portions 842a-842c of foot portion 806. A flexible membrane 844 is connected to the body 802 and extends along each portion 842. The cam member 846 is configured to be positioned within one of the grooves 840a-840 c. The cam assembly 846 is further configured to be movable into and out of any of the recesses 840a-840c such that the cam assembly 846 may be disposed below the corresponding portions 842a-842c of the foot portion 806. The cam assembly 846 includes a stem 848 that is movable into any one of the recesses 840a-840c and seats within the corresponding recess 840a-840 c. A cam 850 having a fixed end 852 and a moving end 854 is coupled to the stem 848. It should be noted that although only a single cam 850 is shown, multiple cams 850 may be positioned along the rod 848 between the sides of the support surface 800. The handle 856 extends from a stem 848. The handle 856 is configured to be rotated such that the moving end 854 of the cam 850 rotates about the fixed end 852 from a first position 860 (shown in fig. 34) to a second position 862 (shown in fig. 35).

As shown in fig. 34, when the cam 850 is in the first position 860, the diaphragm 844 rests on a fixed end 852 of the cam 850 such that the top surface 808 of the foot portion 806 is maintained at the first height 810. As shown in FIG. 35, when the cam 850 is rotated to the second position 862, the moving end 854 of the cam 850 moves the diaphragm 844 upward such that the top surface 808 of the foot portion 806 is raised to a second height 870 from the bottom 812 of the support surface 800, wherein the second height 870 is greater than the first height 810. It is noted that in fig. 34-35, the cam member 846 is shown in the recess 840b, thereby raising the portion 842 b. It should be understood that the cam member 846 may also be moved into the recesses 840a and 840c to raise the height of the portions 842a or 842c, respectively.

Referring to fig. 36, patient support surface 900 includes a body 902 having a body portion 904 and an opposing foot portion 906. The patient support surface 900 may be a foam mattress or an air mattress. In some embodiments, the patient support surface 900 may be any of the support surfaces described in fig. 1-33. Top surface 908 extends from body portion 904 to foot portion 906. The top surface 908 is positioned at a first height 910 from the bottom 912 of the support surface 900. Patient 920 is configured to rest on top surface 908 with their feet 922 at foot portion 906 of support surface 900. Heel suspension mechanism 924 is positioned within foot portion 906 to vary the height of top surface 908. By varying the height of the top surface 908, the heel 926 of the patient's foot 922 is separated from the top surface 908 by a gap 928 (as shown in fig. 37).

Heel suspension mechanism 924 includes a plurality of cams 940. In the illustrated embodiment, heel suspension mechanism 924 includes three cams 940a-940 c; however, any number of cams 940 may be envisioned. Each cam 940a-940c is positioned under one of three corresponding portions 942a-942c of the foot portion 906. A flexible membrane 944 is coupled to the body 902 and extends along each of the portions 942a-942 c. Each cam 940a-940c has a fixed end 952 and a movable end 954. It should be noted that although only a single cam 940a-940c is shown, multiple cams 940a-940c may be positioned between the sides of the support surface 800 and connected by a rod. A knob 956 is disposed on each cam 940a-940c to rotate the respective cam 940a-940c such that the movable end 954 of the respective cam 940a-940c rotates about the fixed end 952 from a first position 962 (shown in FIG. 36) to a second position 964 (shown in FIG. 37).

As shown in FIG. 36, when each cam 940a-940c is in the first position 962, the diaphragm 944 rests on the fixed end 952 of each cam 940a-940c such that the top surface 908 of the foot portion 906 is maintained at the first height 910. As shown in fig. 37, when cam 940b is rotated to a second position 964, moving end 954 of cam 940b causes diaphragm 944 to move upward such that the top surface of foot portion 906 is raised to a second height 970 from bottom 912 of support surface 900, wherein second height 970 is greater than first height 910. Notably, in fig. 37, cam 940b is shown rotated, thereby lifting portion 942 b. It should be understood that cams 940a-940c are also rotatable to raise the height of portion 942a or portion 942c, respectively. In some embodiments, any number of cams 940a-940c may be rotated to change the height of top surface 908 of foot portion 906.

Referring to fig. 38, the patient support surface 1000 includes a body 1002 having a body portion 1004 and opposing foot portions 1006. The patient support surface 1000 may be a foam mattress or an air mattress. In some embodiments, the patient support surface 1000 may be any of the support surfaces described in fig. 1-33. The top surface 1008 extends from the body portion 1004 to the foot portion 1006. The top surface 1008 is positioned at a first height 1010 from a bottom 1012 of the support surface 1000. The patient 1020 is configured to rest on the top surface 1008 with their feet 1022 located at the foot portion 1006 of the support surface 1000. A heel suspension mechanism 1024 is positioned within the foot portion 1006 to vary the height of the top surface 1008. By varying the height of the top surface 1008, the heel 1026 of the patient's foot 1022 is separated from the top surface 1008 by a gap 1028 (as shown in fig. 39).

Heel suspension mechanism 1024 includes a plurality of cams 1040. In the illustrated embodiment, heel suspension mechanism 1024 includes three cams 1040a-1040 c; however, any number of cams 1040 are contemplated. Each cam 1040a-1040c is positioned under one of three corresponding portions 1042a-1042c of foot 1006. The flexible membranes 1044a-1044c are connected to the body 1002 by hinges 1046. Each diaphragm 1044a-1044c extends along a respective portion 1042a-1042 c. Each cam 1040a-1040c has a fixed end 1052 and a moving end 1054. It should be noted that although only a single cam 1040a-1040c is shown, multiple cams 1040a-1040c may be disposed between the sides of the support surface 1000 and connected by a rod. A knob 1056 is positioned on each cam 1040a-1040c to rotate the respective cam 1040a-1040c such that the moving end 1054 of the respective cam 1040a-1040c rotates about the fixed end 1052 from a first position 1060 (shown in FIG. 38) to a second position 1062 (shown in FIG. 39).

As shown in FIG. 38, when each cam 1040a-1040c is in the first position 1060, each diaphragm 1044 rests upon the fixed end 1052 of the respective cam 1040a-1040c such that the top surface 1008 of the foot portion 1006 remains at the first height 1010. As shown in fig. 39, when the cam 1040b is rotated to the second position 1062, the moving end 1054 of the cam 1040b rotates the diaphragm 1044b upward about its hinge 1046 such that the top surface 1008 of the foot portion 1006 is raised from the bottom 1012 of the support surface 1000 to a second height 1070, wherein the second height 1070 is greater than the first height 1010. Notably, in fig. 39, cam 1040b is shown rotated to raise portion 1042 b. It should be appreciated that cams 1040a and 1040c are also rotatable to raise the height of portions 1042a or 1042c, respectively. In some embodiments, any number of cams 1040a-1040c may be rotated to change the height of the top surface 1008 of the foot portion 1006.

Referring to fig. 40, a patient support surface 1100 includes a body 1102 having a body portion 1104 and opposing foot portions 1106. A plurality of foam segments 1108 are positioned within body 1102 from body portion 1104 to foot portion 1106. In some embodiments, the support surface 1100 may be any of the support surfaces described in fig. 1-33. The top surface 1110 extends from the body portion 1104 to the foot portion 1106. The top surface 1110 is disposed at a first height 1112 from the bottom 1114 of the support surface 1100. The patient 1120 is configured to rest on the top surface 1110 with their feet 1122 at the foot portion 1106 of the support surface 1100. Heel suspension mechanism 1124 is positioned within foot portion 1106 to vary the height of top surface 1110. By changing the height of the top surface 1110. The heel 1126 of the patient's foot 1122 is separated from the top surface 1110 by a gap 1128 (shown in FIG. 41).

The heel suspension mechanism 1124 includes a plurality of air bladders 1128, the plurality of air bladders 1128 being located in the foot portion 1106 of the support surface 1100 below the foam portion 1108. In the illustrated embodiment, heel suspension mechanism 1124 includes air bladders 1128a-1128 d; however, any number of air bladders 1128 may be incorporated into heel suspension mechanism 1124. Air bladder 1128, which is not incorporated into heel suspension mechanism 1124, may be a foam filled air bladder. Each air bladder 1128a-1128d is positioned below a respective portion 1130a-1130d of foot portion 1106. Each bladder 1128a-1128d is fluidly connected to a valve 1140 via a respective hose 1142a-1142 d. A manual pump 1144 is fluidly connected to the valve 1140 to supply a flow of air to the valve 1140. In some embodiments, an electric pump may be fluidly connected to the valve 1140. The valve 1140 includes a dial 1146 that is actuated to direct air flow to one of the air bladders 1128a-1128 d. The tuning disk 1146 includes indicators 1148a-1148d, each of which corresponds to one of the hoses 1142a-1142d, and thus to a respective bladder 1128a-1128 d. The manual pump 1144 may be operated to supply a flow of air to one of the air bags 1128a-1128d via the valve 1140 to inflate the respective air bag 1128a-1128d from a first position 1162 (shown in FIG. 40) to a second position 1164 (shown in FIG. 41).

As shown in fig. 40, the top surface 1110 of the foot portion 1106 remains at the first height 1112 when each bladder 1128a-1128d is in the first position 1162. As shown in fig. 41, when the air bladder 1128b is inflated to the second position 1164, the top surface 1110 of the foot portion 1106 is raised from the bottom 1114 of the support surface 1100 to a second height 1170, wherein the second height 1170 is greater than the first height 1112. Notably, in fig. 41, air bladder 1128b is shown inflated, thereby raising portion 1130 b. It should be understood that bladders 1128a, 1128c, and 1128d are also inflatable to raise the height of portions 1130a, 1130c, and 1130d, respectively. In some embodiments, valve 1140 may be configured such that various combinations of bladders 1128a-1128d may be inflated to change the height of top surface 1110 of foot portion 1106.

Referring to fig. 42, the patient support surface 1200 includes a body 1202 having a body portion 1204 and an opposing foot portion 1206. A plurality of balloons 1208 are disposed within the body 1202 from the body portion 1204 to the foot portion 1206. In some embodiments, the support surface 1200 may be any of the support surfaces described in fig. 1-33. The top surface 1210 extends from the body portion 1204 to the foot portion 1206. The top surface 1210 is disposed at a first height 1212 from a bottom 1214 of the support surface 1200. The patient 1220 is configured to rest on the top surface 1210 with their feet 1222 at the foot 1206 of the support surface 1200. A heel suspension mechanism 1224 is positioned within the foot portion 1206 to vary the height of the top surface 1210. By varying the height of the top surface 1210, the heel 1226 of the patient's foot 1222 is separated from the top surface 1210 by a gap 1228 (shown in fig. 43).

Heel suspension mechanism 1224 includes a plurality of air bladders 1208 positioned in foot portion 1206 of support surface 1200. In the illustrated embodiment, heel suspension mechanism 1224 includes air bladders 1208a-1208 c; however, any number of air bladders 1208 may be incorporated into heel suspension mechanism 1224. Bladder 1208 not incorporated into heel suspension mechanism 1224 may be a foam-filled air bladder. Each air bladder 1208a-1208c is positioned below a respective portion 1230a-1230d of foot portion 1206. Each bladder 1208a-1208c is fluidly connected to a release valve 1240 via a respective hose 1242a-1242 c. Release valve 1240 is configured to release air from any of air bladders 1208a-1208 c. The valve 1240 includes a dial 1246 that is actuated to release air flow from any of the air bladders 1208a-1208c to the pump 1250. The adjustment dial 1246 includes indicators 1248a-1248c, each of which corresponds to one of the hoses 1242a-1242c and, therefore, to a respective bladder 1208a-1208 c. The valve 1240 is operable to release air from any of the air bladders 1208a-1208c to deflate the respective air bladder 1208a-1208c from the first position 1260 (shown in fig. 42) to the second position 1262 (shown in fig. 43).

As shown in FIG. 42, when each bladder 1208a-1208c is in the first position 1260, the top surface 1210 of the foot portion 1206 is maintained at the first height 1212. As shown in fig. 43, when the air bladders 1208a and 1208b are deflated to the second position 1262, the top surface 1210 of the foot portion 1206 is lowered to a second height 1270 from the bottom 1214 of the support surface 1200, wherein the second height 1270 is less than the first height 1212-it is noted that in fig. 43, the air bladder 1208a is shown deflated by about 50%, and the air bladder 1208b is shown deflated by about 25%, thereby lowering the portions 1230a and 1230 b. It should be appreciated that any number of air bladders 1208a-1208c may be deflated to any pressure to lower the height of the portions 1230a-1230c, respectively, thereby lowering the top surface 1210 of the foot portion 1206.

Referring to fig. 44, the patient support surface 1300 includes a body 1302 having a body portion 1304 and opposing foot portions 1306. The patient support surface 1300 may be a foam mattress or an air mattress. In some embodiments, the patient support surface 1300 may be any of the support surfaces described in fig. 1-33. The top surface 1310 extends from the body portion 1304 to the foot portion 1306. The top surface 1310 is disposed at a first height 1312 from the bottom 1314 of the support surface 1300. The top surface 1310 is sloped at the foot portion 1306 forming a sloped surface 1318 from the first height 1312 to the second height 1316. The patient 1320 is configured to rest on the top surface 1310 with its feet 1322 on the inclined surface 1318. A heel suspension mechanism 1324 is positioned within the foot portion 1306 below the sloped surface 1318 to change the height of the sloped surface 1318. By varying the height of the inclined surface 1318, the heel 1326 of the patient's foot 1322 is separated from the top surface 1310 by a gap 1328 (shown in fig. 45).

The heel suspension mechanism 1324 includes an air bladder 1326 that is positioned below the sloped surface 1318 of the top surface 1310 of the support surface 1300. The air bladder 1326 is fluidly connected to the manual pump 1340 via a hose 1342. The manual pump 1340 is configured to inflate the air bladder 1326. The valve 1340 is operable to provide air to the air bladder 3126 to inflate the air bladder 1326 from a first position 1360 (shown in fig. 44) to a second position 1362 (shown in fig. 45). As shown in fig. 44, when air bladder 1326 is deflated to first position 1360, sloped surface 1318 is held in first position 1364. As shown in fig. 45, when air bladder 1326 is inflated to second position 1362, sloped surface 1318 is raised to second position 1366, wherein second position 1366 raises the height above top surface 1310.

Referring to fig. 46, the patient support surface 1400 includes a body 1402 having a body portion 1404 and opposing foot portions 1406. The patient support surface 1400 may be a foam mattress or an air mattress. In some embodiments, the patient support surface 1400 may be any of the support surfaces described in fig. 1-33. The top surface 1410 extends from the body portion 1404 to the foot portion 1406. Top surface 1410 is positioned at a first height 1412 from bottom 1414 of support surface 1400. Top surface 1410 is sloped at foot portion 1406 from a first height 1412 to a second height 1416 to form a sloped surface 1418. The patient 1420 is configured to rest on the top surface 1410 with its feet 1422 resting on the inclined surface 1418. Heel suspension mechanism 1424 is positioned within the foot portion, below sloped surface 1418, to change the height of sloped surface 1418. By varying the height of the inclined surface 1418, the heel 1426 of the patient's foot 1422 is separated from the top surface 1410 by a gap 1428 (as shown in fig. 47 and 48).

Microclimate system 1430 is positioned below top surface 1410 of body portion 1404. The microclimate system 1430 includes an air cell 1432, the air cell 1432 configured to force air over a top surface 1410 of the body portion 1404. In some embodiments, the bladder 1432 may extend to the foot portion 1406. Microclimate system 1430 is fluidly connected to valve 1436 by hose 1438. Valve 1436 is fluidly connected to pump 1440 by hose 1442. Pump 1440 is configured to provide air flow to microclimate system 1430.

The heel suspension mechanism 1424 includes air bladders 1450a-1450b, the air bladders 1450a-1450b being positioned below a sloped surface 1418 of the foot portion 1406 of the support surface 1400. The air bladders 1450a-1450b are fluidly connected to the pump 1440 via respective hoses 1452a-1452 b. Valve 1436 includes an adjustment dial 1454 having indicators 1456a-1456 c. The tuning disc 1454 is turned by one of the turn indicators 1456a-1456b to provide a flow of air to the air bladders 1450a-1450b, respectively, to inflate the respective air bladders 1450a-1450b from first positions 1460a-1460b to second positions 1462a-1462b (as shown in FIGS. 47 and 48). Adjustment dial 1454 may also be turned indicator 1456c to provide air flow to microclimate system 1430.

As shown in FIG. 46, when air bladders 1450a-1450b are deflated to first positions 1460a-1460b, inclined surfaces 1418 are maintained in first positions 1464. Fig. 46 also shows that adjustment dial 1454 is turned indicator 1456c to provide air flow to microclimate system 1430. As shown in fig. 47, when the adjustment dial 1454 is turned towards the indicator 1456a, the pump 1440 provides a flow of air to the air bladder 1450a to inflate the air bladder 1450a to the second position 1464a to raise the inclined surface 1418. As shown in fig. 48, when the adjustment dial 1454 is turned by the indicator 1456b, the pump 1440 provides a flow of air to the air bladder 1450b to inflate the air bladder 1450b to the second position 1464b to raise the inclined surface 1418. It is understood that the tuning disc 1454 can be configured to provide a flow of air to any combination of the air bladders 1450a-1450b and the microclimate system 1430.

Referring to fig. 49, a patient support surface 1500 includes a body 1502 having a body portion 1504 and an opposing foot portion 1506. The patient support surface 1500 may be a foam mattress or an air mattress. In some embodiments, the patient support surface 1500 may be any of the support surfaces described in fig. 1-33. Top surface 1508 extends from body portion 1504 to foot portion 1506. Top surface 1508 is disposed at a first height 1510 from a bottom 1512 of support surface 1500. Patient 1520 is configured to rest on top surface 1508 with their feet 1555 positioned on foot portion 1506 of support surface 1500. Heel suspension mechanism 1524 is positioned within foot portion 1506. The heel suspension mechanism 1524 is movable onto the top surface 1508 such that the heel 1526 of the patient's foot 1522 is separated from the top surface 1508 by a gap 1528 (as shown in fig. 50).

Heel suspension mechanism 1524 includes a wedge 1538, such as a foam wedge, that is positioned at end 1540 of foot portion 1506. The end 1540 of the foot portion 1506 includes a notch 1542 formed in the foot portion 1506. The wedge 1538 rests in the notch 1542 and is secured to the foot portion 1506 by a strap 1544. The strap 1544 holds the wedge 1538 in the first position 1560 in the recess 1542. The wedge 1538 is configured to be flipped over the top surface 1508 of the foot portion 1506 to a second position 1562 (shown in fig. 50). As shown in fig. 49, when wedge 1538 is in first position 1560, top 1570 of wedge 1538 is at first height 1510 and is flush with top surface 1508. As shown in fig. 50, when wedge 1538 is flipped to second position 1562, lateral side 1572 of wedge 1538 is seated on top surface 1508 such that medial side 1574 of wedge 1538 faces upward and is seated at a second height 1576 greater than first height 1510. When wedge 1538 is in the second position 1562, the patient's foot 1522 is configured to rest on medial side 1574 of wedge 1538 to raise the patient's heel 1526.

Referring to fig. 51, the patient support surface 1600 includes a body 1602 having a body portion 1604 and opposing foot portions 1606. The patient support surface 1600 may be a foam mattress or an air mattress. In some embodiments, the patient support surface 1600 may be any of the support surfaces described in fig. 1-33. The top surface 1608 extends from the body portion 1604 to the foot portion 1606. The top surface 1608 is disposed at a first height 1610 from a bottom 1612 of the support surface 1600. The patient 1620 is configured to rest on the top surface 1608 with their feet 1622 at the foot portion 1606 of the support surface 1600. Heel suspension mechanism 1624 is positioned within foot portion 1606. The heel suspension mechanism 1624 may be moved over the top surface 1608 such that a heel 1626 of a patient's foot 1622 is separated from the top surface 1608 by a gap 1628 (as shown in fig. 52).

The heel suspension mechanism 1624 includes a wedge 1638, such as a foam wedge, that is positioned at an end 1640 of the foot portion 1606. The end 1640 of the foot portion 1606 includes a notch 1642 formed in the foot portion 1606. The wedge 1638 rests in the notch 1642 in a first position 1660. The wedge 1638 is configured to be slid to a second location 1662 on the top surface 1608 of the foot portion 1606 (as shown in FIG. 52). As shown in FIG. 51, when the wedge 1638 is in the first position 1660, the top 1670 of the wedge 1638 is at the first height 1610 and flush with the top surface 1608. As shown in FIG. 52, when the wedge 1638 is slid to the second position 1662, the top 1670 of the wedge 1638 is positioned at a second height 1674 that is greater than the first height 1610. The patient's foot 1622 is configured to rest on the top portion 1670 of the wedge 1638 to raise the patient's heel 1626 when the wedge 1638 is in the second position 1662.

Referring to fig. 53, patient support surface 1700 includes a body 1702 having a body portion 1704 and an opposing foot portion 1706. The patient support surface 1700 may be a foam mattress or an air mattress. In some embodiments, the patient support surface 1700 may be any of the support surfaces described in fig. 1-33. The top surface 1708 extends from the body portion 1704 to the foot portion 1706. The top surface 1708 is positioned at a first height 1710 from the bottom 1712 of the support surface 1700. Patient 1720 is configured to rest on top surface 1708 with their feet 1722 at foot portion 1706 of support surface 1700. A heel suspension mechanism 1724 is disposed within the foot portion 1706. The heel suspension mechanism 1724 is movable under the patient's foot 1722 such that the heel 1726 of the patient's foot 1722 is separated from the top surface 1708 by a gap 1728 (as shown in fig. 54).

The heel suspension mechanism 1724 includes a cut-out 1738 in the foot portion 1706. The cut-out 1738 includes an undercut 1740, the undercut 1740 beginning at a location 1742 spaced apart from the end 1744 of the foot portion 1706 and extending toward the body portion 1704 to a location 1746. Position 1742 is spaced a first distance 1748 from end 1744 and position 1746 is spaced a second distance 1750 from end 1744. Second distance 1750 is greater than first distance 1748. A cut-out 1752 extends from the undercut 1740 through the top surface 1708 at a location 1746. In some embodiments, undercut 1740 and cut 1752 may be sealed with zippers. The cut-out 1738 is configured to be rolled from location 1746 toward end 1744 to form a rolled cut-out 1754 (as shown in fig. 54). As shown in FIG. 53, when the cut-out portion 1738 is in the first deployed position 1760, the top 1762 of the cut-out portion 1738 is at the first height 1710 and is flush with the top surface 1708. As shown in fig. 54, when the cut portion 1738 is rolled to a second position 1762 to form a rolled cut portion 1754, a portion 1764 of a bottom 1766 of the cut portion 1738 is disposed at a second height 1774 that is greater than the first height 1710. The patient's foot 1722 is configured to rest on the rolled up cut portion 1754 to raise the patient's heel 1726 when the cut portion 1738 is in the second position 1762.

Referring to fig. 55, a patient support surface 1800 includes a body 1802 having a body portion 1804 and opposing foot portions 1806. The patient support surface 1800 may be a foam mattress or an air mattress. In some embodiments, patient support surface 1800 may be any of the support surfaces described in fig. 1-33. The top surface 1808 extends from the body portion 1804 to the foot portion 1806. The top surface 1808 is positioned at a first height 1810 from the bottom 1812 of the support surface 1800. The patient 1820 is configured to rest on the top surface 1808 with their feet 1822 in the foot portion 1806 of the support surface 1800. A heel suspension mechanism 1824 is disposed within the foot portion 1806. The heel suspension mechanism 1824 may be moved onto the top surface 1808 such that the heel 1826 of the patient's foot 1822 is separated from the top surface 1808 by a gap 1828 (as shown in fig. 56).

The heel suspension mechanism 1824 includes a cutout 1838 in the foot portion 1806. Cutout 1838 includes an undercut 1840, which 1840 begins at end 1844 of foot portion 1806 and extends toward body portion 1804 to a location 1846 spaced apart from end 1844 by a distance 1848. When the heel suspension mechanism 1824 is not in use, the zipper 1836 extends along the bottom cutout 1840 to secure the cutout 1838 to the foot portion 1806. The cutback 1838 is configured to be folded from a first position 1860 to a second position 1862 (shown in fig. 56). As shown in fig. 55, when cutback 1838 is in first position 1860, top 1862 of cutback 1838 is at first height 1810 and flush with top surface 1808. As shown in fig. 56, when the cutback 1838 is folded to the second position 1862, the bottom 1866 of the cutback 1838 is disposed at a second elevation 1874 that is greater than the first elevation 1810. The patient's foot 1822 is configured to rest on the bottom portion 1866 of the cutback 1838 to raise the patient's heel 1826 when the cutback 1838 is in the second position 1862. Additional foam padding 1880 may be placed on the bottom 1866 of the cutout 1838 to further elevate the patient's heel 1826 and protect the patient's foot 1822 from the zipper 1836.

Referring to fig. 57, the patient support surface 1900 includes a body 1902 having a body portion 1904 and opposing foot portions 1906. The patient support surface 1900 may be a foam mattress or an air mattress. In some embodiments, the patient support surface 1900 may be any one of the support surfaces described in fig. 1-33. The top surface 1908 extends from the body portion 1904 to the foot portion 1906. The top surface 1908 is positioned at a first height 1910 from a bottom 1912 of the support surface 1900. The patient 1920 is configured to rest on the top surface 1908 with their feet 1922 in the foot portion 1906 of the support surface 1900. A heel suspension mechanism 1924 is disposed within foot portion 1906. The heel suspension mechanism 1924 can be moved to raise the foot 1906 such that the heel 1926 of the patient's foot 1922 is separated from the top surface 1908 by a gap 1928 (as shown in fig. 58).

The heel suspension mechanism 1924 includes a jack 1940 positioned below the foot portion 1906. Jack 1940 includes a base 1942 and an expandable arm 1944 extending from base 1942 to a top post 1946. The top post 1946 is connected to a flexible diaphragm 1948, the flexible diaphragm 1948 extending along the bottom 1912 of the support surface 1900 at the foot portion 1906. Handle 1950 is connected to screw 1952 and screw 1952 is threaded to expandable arm 1944. When handle 1950 is rotated in a first direction, screw 1952 is actuated to lower expandable arm 1944 to a folded position 1954 (as shown in fig. 57). When handle 1950 is rotated in a second, opposite direction, screw 1952 is actuated to raise expandable arm 1944 to a raised position 1956 (as shown in fig. 58). In some embodiments, expandable arms 1944 may be hydraulically actuated.

As shown in fig. 57, when expandable arms 1944 are in folded position 1954, top surface 1908 of foot portion 1906 is positioned at first height 1910. As shown in fig. 58, when expandable arm 1944 is in raised position 1956, top post 1946 of jack 1940 pushes diaphragm 1948 upward to push bottom 1912 of support surface 1900 at foot portion 1906, thereby raising top surface 1908 at foot portion 1906 to a second height 1960 greater than first height 1910.

Referring to fig. 59, patient support surface 2000 includes a body 2002 having a body portion 2004 and an opposing foot portion 2006. The patient support surface 2000 may be a foam mattress or an air mattress. In some embodiments, the patient support surface 2000 may be any one of the support surfaces described in fig. 1-33. The top surface 2008 extends from the body portion 2004 to the foot portion 2006. The top surface 2008 is positioned at a first height 2010 from a bottom 2012 of the support surface 2000. Patient 2020 is configured to rest on top surface 2008 with their feet 2022 in foot portion 2006 of support surface 2000. Heel suspension mechanism 2024 is disposed within foot portion 2006. Heel suspension mechanism 2024 may be moved to raise foot portion 2006 such that the heel of patient's foot 2022 is separated from top surface 2008 by gap 2028 (as shown in fig. 60).

Heel suspension mechanism 2024 includes a riser assembly 2040 disposed below body 2002. The riser assembly 2040 includes a base 2042 that extends along the bottom 2012 of the support surface 2000. The arms 2044 extend from the base 2042 to the top plate 2046. The top plate 2046 is connected to a flexible membrane 2048, the flexible membrane 2048 extending along the bottom 2012 of the support surface 2000 at the foot portion 2006. The arm 2044 may extend from the base 2042. In some embodiments, the arms 2044 are hydraulically lifted from the base 2042. In some embodiments, the arm 2044 is telescopically extended from the base 2042. The arms 2044 can be actuated to lower the top plate 2046 to the collapsed position 2054 (as shown in fig. 59). The arms 2044 can also be actuated to raise the top plate 2046 to a raised position 2056 (as shown in fig. 60). As shown in fig. 59, the top surface 2008 of the foot portion 2006 is disposed at a first height 2010 when the top panel 2046 is in the folded position 2054. As shown in fig. 60, when the top plate 2046 is in the raised position 2056, the top surface 2008 at the foot portion 2006 is raised to a second height 2060 that is greater than the first height 2010.

Referring to fig. 61, the patient support device 2100 is embodied as a mattress 2100, the mattress 2100 having a top cover 2104, one or more support members 2102, and a bottom cover 2106. The mattress 2100 may be any mattress described herein. The top cover 2104 and the bottom cover 2106 are joined together, such as with a zipper, to form a cover or housing having an interior region into which the support member 2102 is received. In the illustrated example, the support member 2102 is shown as a single foam block, but in other embodiments, the support member 2102 comprises a plurality of foam members or inflatable bladders. The top cover 2104 can be an impermeable cover, e.g., a liquid impermeable plastic cover. In other embodiments, the top cap 2104 is a liquid permeable fabric cover. In other embodiments, the cap 2104 is made of a moisture permeable material that is permeable to air and moisture, but impermeable to liquid.

The fluid entry detection system 2110 is positioned between the top 2104 and other support components of the mattress 2100. The fluid entry detection system 2110 generally includes a flexible substrate 2112. The flexible substrate 2112 comprises a hydrophobic material, such as plastic. In some embodiments, the flexible substrate 2112 may include a synthetic resin. In some embodiments, the flexible substrate 2112 may comprise a thermoplastic polymer material. The flexible substrate 2112 is substantially rectangular and extends from a head end 2114 of the mattress 2100 to a foot end 2116 of the mattress 2100 and laterally across the width of the mattress 2100. Thus, the flexible substrate 2112 extends completely between the support component 2102 and the top cover 2104 of the mattress 2100.

As shown in fig. 62, the flexible substrate 2112 includes conductive traces 2120 extending along a first side 2122 of the flexible substrate 2112. The conductive traces 2124 extend along a second side 2126 of the flexible substrate 2112. Conductive traces 2120 and conductive traces 2124 may include conductive wires woven onto flexible substrate 2112. In some embodiments, the conductive traces 2120 and the conductive traces 2124 comprise conductive ink printed on the flexible substrate 2112. The conductive traces 2120 and the conductive traces 2124 can be electrically connected to the controller 2130. In some embodiments, the controller 2130 includes an alarm 2132, and the alarm 2132 can be an audible or visual alarm. In some embodiments, the controller 2130 is electrically or wirelessly connected to a remote alarm 2134, for example, an alarm at the nurse station 2170.

A plurality of conductive segments 2140 extend from conductive trace 2120. Segment 2140 may include conductive wires woven over flexible substrate 2112. In some embodiments, the segment 2140 comprises conductive ink printed on the flexible substrate 2112. Segment 2140 extends from conductive trace 2120 toward conductive trace 2124. Segment 2140 does not contact conductive trace 2124. Another plurality of conductive segments 2142 extend from conductive trace 2124. Segment 2142 may include conductive wires woven over flexible substrate 2112. In some embodiments, the section 2142 comprises conductive ink printed on the flexible substrate 2112. Segment 2142 extends from conductive trace 2124 toward conductive trace 2120. Segment 2142 does not contact conductive trace 2120. A wicking material can overlie conductive trace 2120, second conductive trace 2124, and segments 2140 and 2142.

The segments 2140 and 2142 alternate along the length 2150 of the flexible substrate 2112 from the head end 2114 to the foot end 2116. Thus, segments 2140 and 2142 are interleaved or interdigitated. Each path 2140 is disposed adjacent to a path 2142, and each path 2142 is disposed adjacent to a path 2140. When the flexible substrate dries, an open circuit is formed between conductive trace 2120 and conductive trace 2124. Controller 2130 measures the impedance between adjacent segments 2140 and 2142. In some embodiments, controller 2130 is calibrated to measure a baseline impedance between segment 2140 and segment 2142. That is, when the flexible substrate 2112 is kept dry, the impedance between the section 2140 and the section 2142 is constant over a range. A threshold amount of liquid (e.g., cleaning solution or incontinence) is present on the flexible substrate 2112, forming a closed circuit with the conductive traces 2120 and the conductive traces 2124 as the flexible substrate 2112 is wetted. When the flexible substrate is wet, the impedance between the conductive traces 2120 and the conductive traces 2124 changes.

If fluid penetrates through the top cover 2104, the liquid is collected on the flexible substrate 2112. In some embodiments, the liquid penetrates through the top cap 2104 because of a tear in the top cap 2104. In some embodiments, the liquid penetrates through the top cover 2104 because the top cover 2104 has worn away. As the liquid permeates through the top cover 2104, the liquid stagnates on the flexible substrate 2112. Since the liquid bridges the gap between adjacent sections 2140 and 2142, the liquid changes the impedance between sections 2140 and 2142. The impedance is detected by the controller 2130. In particular, the liquid bridging between the sections 2140, 2142 results in the impedance being significantly reduced, changing the open (i.e., dry) state to a closed (i.e., wet) state. In response, the controller 2130 sends an alert that the top cap 2104 has been damaged and liquid has entered the mattress 2100.

In some embodiments, a passive RFID tag 2150 may be located on the flexible substrate 2112 and in electrical communication with the conductive traces 2120 and the conductive traces 2124. The antenna 2152 receives wireless energy transmitted by the RFID tag 2150 indicating whether the flexible substrate is dry or wet. In some embodiments, the reader 2154 of the controller 2130 powers an antenna that generates an electromagnetic field that powers the passive RFID tag 2150. The reader 2154 receives signals from the antenna containing backscattered data from the passive RFID tag 2150 and sends a notification message in response to at least one signal from the antenna indicating that the flexible substrate 2112 is wet. The reader may be communicatively connected to a network 2160 of the healthcare facility and configured to wirelessly communicate with the network 2160.

In some embodiments, the alarm 2132 can be activated when the impedance between the conductive trace 2120 and the conductive trace 2124 changes. The alarm 2132 may be a visual alarm or an audible alarm. An alarm 2132 may be mounted on the patient support device 2100. In other embodiments, the alarm 2134 is remote from the patient support device 2100, for example, at a nurse station 2170.

The liquid detection by the system 2110 prevents a caregiver from having to perform a hand check to determine if the interior of the mattress has been soiled due to a damaged cover 2104. Once fluid penetrates through the cap 2104, the caregiver is alerted in real time. Thus, instead of waiting for the liquid to sink into the mattress 2100 before disposal, the caregiver may dispose of the liquid within the mattress 2100 more quickly. By disposing of liquid into the mattress 2012 in a more timely manner, only the cover 2104 need be replaced and the life of the mattress 2100 may be extended. Additionally, the mattress 2100 may be properly cleaned in recognition of liquid ingress, thereby preventing infection when using the mattress 2012.

Referring now to fig. 63, mattress 2200 includes a foam base 2202 having a bottom portion 2204, a head portion 2206, and a foot portion 2208. Base portion 2204 extends between head portion 2206 and foot portion 2208. Bottom portion 2204 has a height 2220, and head portion 2206 and foot portion 2208 have a height 2222 greater than height 2220. Cavity 2224 is formed in foam base 2202 between head portion 2206 and foot portion 2208 above bottom portion 2204. In some embodiments, foam base 2202 can also include side portions (not shown) that extend to height 2222 such that cavity 2224 is enclosed in all sides.

Foam layer 2230 is positioned within cavity 2224 and extends from head portion 2206 to foot portion 2208. In the illustrated embodiment, foam layer 2230 is a separate layer from foam base 2202. In other embodiments, the foam layer 2230 may be integrally formed with the foam base 2202. Foam layer 2230 extends to a height 2232, and height 2232 is less than a height 2222 of head portion 2206 and foot portion 2208. A cavity 2234 is defined between the head portion 2206 and the foot portion 2208 and above the foam layer 2230. Cavity 2234 is sized so that a patient may lie on mattress 2200 without creating pressure points due to the difference in height between foam layer 2230 and head portion 2206 and foot portion 2208.

A treatment layer 2240 is disposed within cavity 2234. Treatment layer 2240 may be inflated from a deflated state to an inflated state. When the patient does not require therapeutic treatment, the treatment layer 2240 is deflated. If the patient requires a therapeutic treatment, such as to treat an ulcer or bedsore, the treatment layer 2240 is inflated.

Protective layer 2250 is disposed on therapeutic layer 2240. Protective layer 2250 extends across head portion 2206 and foot portion 2208 of foam base 2202. The protective layer 2250 is formed of a three-dimensional spacer. In some embodiments, protective layer 2250 is formed from a layer of nonwoven fabric. In other embodiments, protective layer 2250 is formed from a foam layer. It should be understood that protective layer 2250 may be made from a combination of materials. The treatment layer 2240 is positioned adjacent to the protective layer 2250 such that when the treatment layer 2240 is deflated, the protective layer 2240 continues to provide a level surface for the patient. That is, protective layer 2250 is formed such that the patient does not sink into cavity 2234 when treatment layer 2240 is deflated.

A covering 2260 is positioned around the mattress 2200. Cover 2260 surrounds foam base 2202, foam layer 2230, treatment layer 2240, and protective layer 2250. The cover 2260 may include a zipper or other fastening mechanism to seal the cover 2260 around the mattress 2200. In some embodiments, cover 2260 is formed of a water-impermeable material to prevent liquids, such as patient perspiration, from soaking through the layers of mattress 2200.

Referring now to fig. 64, the therapeutic layer 2240 is formed from a plastic material that can be welded by laser or radio frequency welding. Treatment layer 2240 includes a plurality of balloons 2270. Balloon 2270 may be formed by welding top layer 2272 of treatment layer 2240 to bottom layer 2274 of treatment layer 2240. Balloon 2270 is shown extending along a width 2280 of treatment layer 2240; however, balloon 2270 may be formed to extend along length 2282 of treatment layer 2240. In some embodiments, the capsules 2270 may have other configurations, e.g., an array.

The control unit 2290 is configured to be connected to the treatment layer 2240. The control unit 2290 includes a blower 2292, the blower 2292 being fluidly connected to the treatment layer 2240 via a hose 2294. A hose 2294 is connected to an inlet 2296 of the treatment layer 2240. In one embodiment, a healthcare facility may have multiple mattresses 2200 and a smaller number of control units 2290. That is, the control unit 2290 is only needed when a particular patient requires therapeutic treatment. Thus, the healthcare facility may save costs by having a control unit 2290 that is only targeted to patients requiring treatment. A patient not requiring treatment may use mattress 2200 with treatment layer 2240 in a deflated state. When a patient requires treatment, a control unit 2290 is attached to the treatment layer 2240 to inflate the treatment layer 2240.

In the illustrated embodiment, the treatment layer 2240 includes a valve 2300. Valve 2300 is configured to direct air flow to a particular bladder 2270 via a series of hoses (not shown). In this manner, not all of the air cells 2270 need be inflated at the same time. Specifically, 2270 of the individual balloons may be inflated based on the patient's therapeutic needs. For example, the balloon 2302 in the seat portion 2304 of the treatment layer 2240 can be inflated to provide pressure relief to the sacrum of the patient. In other embodiments, treatment layer 2240 does not include valve 2300 and all of balloons 2270 are inflated simultaneously.

Fig. 65 shows an example of the display 2310 of the control unit 2290. It should be understood that the display 2310 may include user input buttons (e.g., membrane switches) or a touch screen display. The display 2310 includes user input buttons for turning the control unit 2290 on and off. In the illustrated embodiment, the display 2310 includes an "on" input button 2312 and an "off" input button 2314. It should be understood that the input buttons 2312 and 2314 may be replaced with a single power input button.

In embodiments where the treatment layer 2240 includes a valve 2300, a plurality of input buttons 2316 may be provided to select a particular balloon to inflate. For example, the inputs 2316 may include a button 2318 for inflating the head portion, a button 2320 for inflating the torso portion, a button 2322 for inflating the seat portion, and a button 2324 for inflating the foot portion. Other input buttons 2316 may be provided for specific treatments, such as leg or back sores. Another input button 2316 may be provided for inflating all of the air cells 2270.

In some embodiments, the control unit 2290 may provide impact therapy by sending pulses or vibrations to the balloon 2270. In such embodiments, the display 2310 includes input buttons 2340 for controlling impact therapy. The display 2310 includes an input button 2342 for increasing impact therapy and an input button 2344 for decreasing impact therapy. The display 2310 may also include a meter 2346, the meter 2346 having a plurality of icons 2348 that indicate the level of impact therapy.

The display 2310 may also include additional input buttons 2350 for controlling other aspects of the treatment layer 2240. For example, the treatment layer 2240 may implement microclimate control.

Referring now to fig. 66, another embodiment of a therapeutic layer 2360 may be used with mattress 2200. Therapeutic layer 2360 includes a plurality of balloons 2362 that may be formed by laser welding or radio frequency welding as described above. Treatment layer 2360 includes a blower 2364 that is connected to one end or side of treatment layer 2360. A blower 2364 extends through the cover 2260 and includes a power input 2366. A blower 2364 is in fluid communication with each air bag 2362. In some embodiments, a valve selectively fluidly connects air bladder 2362 to blower 2364, as described above.

Another embodiment of control unit 2380 is configured to plug into power input 2366 to provide power to blower 2364. The control unit 2380 may be configured with a display 2382, such as the display 2310 described above. As described above, when a patient requires a therapeutic treatment, control unit 2380 is attached to therapeutic layer 2360.

Referring to fig. 67, to prevent bunching of treatment layer 2240 and protective layer 2250, each of these layers may be coupled to foam substrate 2202 and/or foam layer 2230. In the illustrated embodiment, treatment layer 2240 is coupled to foam layer 2230 by fasteners 2390, such as buttons, zippers, buckles, and the like. Treatment layer 2240 may also be coupled to any of bottom portion 2204, head portion 2206, and/or foot portion 2208 of foam base 2202. In the illustrated embodiment, the protective layer 2250 is connected to the head portion 2206 and the foot portion 2208 by fasteners 2392, such as buttons, zippers, buckles, and the like. Protective layer 2250 may also be attached to bottom layer 2204 of foam layer 2230 or foam base 2202. In some embodiments, protective layer 2250 and therapeutic layer 2240 may be connected.

Mattress 2200 provides a surface to the patient that can be used with or without treatment. In examples where a patient enters a healthcare facility and requires treatment, the patient may be placed on mattress 2200 with treatment layer 2240 already inflated. If the patient does not require treatment later, the treatment layer 2240 can be deflated without having to move the patient. In examples where a patient enters a healthcare facility and treatment is not required, the patient may be placed on mattress 2200 with treatment layer 2240 deflated. If the patient later requires treatment, the treatment layer 2240 can be inflated without moving the patient. Thus, mattress 2200 facilitates the elimination of the need to move the patient once the patient enters the healthcare facility.

Referring now to fig. 68, patient support device 2400 includes a microclimate management (MCM) feature 2402 in a surface 2404 of device 2400 to remove heat and moisture from the skin surface interface. It has been demonstrated that removing heat and moisture can reduce the risk of pressure damage (PI) occurring. Laboratory studies have shown that more heat removal may better prevent ischemia and avascular necrosis. In the sacrum and pelvis, typically approximately 60% of PI occurs over less than 10% of the body surface area. In view of the severity and prevalence of PIs in this area, the MCM 2402 is configured to direct air to the seat portion 2406 of the patient support device 2400.

Patient support device 2400 includes a base 2420 that can be formed from a foam material. In other embodiments, base 2420 is formed from an air bladder or other suitable cushioning material. A base 2420 is shown as a plurality of blocks 2428; however, the base 2420 may be one continuous piece. Base 2420 extends from head end 2422 of device 2400 to seat portion 2406. Blower assembly 2424 is positioned adjacent base 2420 between base 2420 and foot end member 2426 of device 2400. Foot end member 2426 may also be formed of a foam material. In other embodiments, foot end member 2426 is formed from an air bladder or other suitable cushioning material. Another foam layer or foam pad 2430 is positioned above blower assembly 2424 adjacent foot end member 2426. Another foam layer 2440 is positioned over base 2420. In some embodiments, layer 2440 may be formed from a bladder or other suitable cushioning material. A viscous foam layer 2442 is disposed over layer 2440.

The manifold 2450 extends over the adhesive foam layer 2442. The outlet of the blower assembly 2424 is configured to direct the flow of air from the blower assembly 2424, through the passages in the cushion 2430, and into the manifold 2450. Manifold 2450 directs the flow of air into a patient three-dimensional spacer 2452, which is positioned between manifold 2450 and a top surface 2454 of device 2400. Top surface 2456 of patient three-dimensional spacer 2452 forms top surface 2454 of device 2400. The air flow is directed into the seat portion 2406 of the patient support device 2400.

As shown in fig. 69, manifold 2450 includes a manifold three-dimensional spacer 2470 positioned between a top fabric layer 2472 and a bottom fabric layer 2474. Manifold three-dimensional spacer 2470 has a thickness 2476. Holes 2478 are formed in the top surface 2490 of the manifold three-dimensional spacer 2470. An aperture 2478 is formed in the seat portion 2406 of the device 2400 and is configured to direct air flow from the blower assembly 2424 through a top surface 2490 of the manifold three-dimensional spacer 2470 at the seat portion 2406. As shown in fig. 70, air enters blower assembly 2424 through side 2482 of device 2400 and is expelled in manifold three-dimensional spacer 2470. Air exits manifold 2450 through holes 2478.

Referring back to fig. 69, the patient three-dimensional spacer 2452 is positioned over the manifold 2450 and has a thickness 2480 that is less than the thickness 2476 of the manifold three-dimensional spacer 2452. Air flows through the top fabric layer 2472 into the patient three-dimensional spacer 2452 through holes 2492 formed in the bottom surface 2494 of the patient three-dimensional spacer 2452. As shown in fig. 70, air flows around the sacrum and pelvis 2484 of the patient and travels to the head end 2496 of the patient three-dimensional spacer 2452. Air exits patient support device 2400 through holes 2498 (shown in fig. 69) formed in head end 2496 of patient three-dimensional spacer 2452.

The apparatus provides a system for directing a gas flow to a region of interest (ROI). The manifold 2450 is constructed by introducing a layer 2452 of three-dimensional spacer material between two layers 2472, 2474 of fabric material. The manifold three-dimensional spacer 2452 is selected to provide a medium that allows for sufficient airflow. The manifold three-dimensional spacer 2452 is configured to prevent severe blockage of the air flow path through the fabrics 2472, 2474 when a patient load is applied. The top fabric layer 2472 has a pattern of holes punched in the appropriate locations where the most treatment is needed (i.e., the seat portion 2406). The remaining unmodified top fabric layer 2472 and bottom fabric layer 2474 serve as walls to facilitate preventing air from leaking from the manifold 2450.

Device 2400 is configured to provide a low pressure system that can be used to provide airflow for MCM therapy. The location of treatment can be controlled by design so that treatment is provided by the MCM where treatment is most needed. Fig. 71 shows a computational fluid dynamics simulation of velocity particle trajectories. The simulation shows the air flow converging at the seat portion 2406. The pressure spectrum shown in fig. 72 shows a substantially uniform pressure, which helps to easily control the air flow. Patient support device 2400 may utilize a low pressure air source to provide sufficient air flow to the target area.

Referring to fig. 73, the blower assembly 2424 includes a base 2500 having a bottom 2502 and a sidewall 2504 extending from the bottom 2502 to form a cavity 2506. The central platform 2510 extends upwardly from the bottom 2502 to a height greater than the height of the side walls 2504. An opening 2520 is formed in a top surface 2522 of platform 2510 and extends into vacuum chamber 2524.

The vacuum chamber 2524 is fluidly connected to an inlet assembly 2526. The inlet assembly 2526 extends along a side 2528 of the base 2500. The inlet assembly 2526 includes a pair of opposing inlets 2528. In some embodiments, inlet assembly 2526 includes only one inlet 2528. In other embodiments, inlet assembly 2526 may include any number of inlets 2528. Each inlet 2528 includes an opening 2550 extending into a passage 2560. Passageway 2560 in the illustrated embodiment extends between openings 2550 of inlet 2528. Passageway 2560 is in fluid communication with vacuum chamber 2524.

Referring now to fig. 74, blower 2570 is positioned over opening 2520 and sealed to platform 2510. Blower 2570 includes an inlet in fluid communication with vacuum chamber 2524. Thus, blower 2570 is sealed to vacuum chamber 2524. The blower 2570 also includes an outlet 2572 that opens above the base 2500. Although not shown, it should be understood that the blower 2570 includes a fan that draws air into the inlet of the blower 2570. That is, air enters blower assembly 2424 through inlet 2528, passes through passageway 2560 to vacuum chamber 2524, and enters blower 2570 through the inlet. The blower 2570 then exhausts the air through an outlet 2572 above the base 2500.

As shown in fig. 75, the top cover 2590 is sealed to the side wall 2504 of the base 2500 to form the pressurization chamber 2592. The blower 2570 is disposed within the pressurized chamber 2592. Thus, the inlet of the blower 2570 is in fluid communication with the vacuum chamber 2524, and the outlet 2572 of the blower 2570 is in fluid communication with the pressurization chamber 2592. The blower 2570 receives air from the vacuum chamber 2524 and discharges the air into the pressurization chamber 2592. The top cap 2590 includes an opening 2594, the opening 2594 defining an exhaust opening 2596 of the blower assembly 2424.

As shown in fig. 76, each inlet 2528 includes an opening 2550 extending into a passage 2560. Ridge 2600 is formed on bottom 2602 of inlet 2528. The ridges 2600 extend through a portion of the opening 2550 such that the ridges 2600 cover the portion of the opening 2550. Ridges 2600 are configured to facilitate preventing fluid from entering passageway 2560. That is, as air can pass over the ridges 2600 and into the channels 2560, liquid is blocked from entering the channels 2560 by the ridges 2600. The height 2604 of the ridge 2600 is selected based on air flow criteria of the blower assembly 2424.

In operation, blower assembly 2424 draws air from the side of patient support device 2400, as shown in fig. 70. Air enters inlet 2528 and enters vacuum chamber 2524. The blower 2570 is operated to draw air from the vacuum chamber 2524 and discharge the air at a predetermined pressure into the pressurization chamber 2592. The pressurized air exits the pressurization chamber 2592 through an exhaust port 2596. From the exhaust 2596, air passes through an air feed tube or hose into the manifold three dimensional spacer 2452. Pressurized air in manifold three-dimensional spacer 2452 passes through apertures 2478 and 2492 into patient three-dimensional spacer 2452 at the sacrum and pelvis 2484 of the patient. The pressurized air then flows through the patient three-dimensional spacer 2452 to the hole 2498 formed in the head end 2496. The pressurized air exits patient support device 2400 through apertures 2498.

As shown in fig. 77, the blower 2570 of the blower assembly 2424 includes a fan 2620, the fan 2620 being driven by a motor 2622 to draw air into the inlet 2624 and expel the pressurized air through the outlet 2572. The controller 2630 includes a processor 2632 and a memory 2634 electrically connected to the processor 2632. The memory includes instructions that are executed by the processor 2632 to control the motor 2622. For example, blower 2570 may be configured to operate such that the discharged air has a predetermined pressure. The processor 2632 executes instructions to rotate the fan 2620 at an optimal speed to maintain the predetermined pressure. In some embodiments, the predetermined pressure may be a predetermined pressure range. The display 2636 may be configured to display the operating speed and discharge pressure of the blower 2570. The display 2636 may be a touch screen display or include other user input buttons. Accordingly, a display or other user input button may be operated for setting the predetermined discharge pressure and other parameters of the blower assembly 2424.

A pressure sensor 2650 is provided to monitor the discharge pressure at outlet 2572. In some embodiments, the pressure sensor 2650 may be configured to detect a discharge pressure at the exhaust port 2596 of the blower assembly 2424. If the pressure sensor 2650 detects that the discharge pressure is outside of the predetermined pressure range or does not maintain the predetermined pressure, the controller 2630 may vary the speed of the motor 2622 to help maintain the predetermined pressure or the predetermined pressure range.

A speed sensor 2660 may also be provided to monitor the speed of the motor 2622. By monitoring the motor speed, the controller 2630 may be operated to detect a blockage in the blower assembly 2424. Referring to fig. 78, a method 2670 is shown for determining a blockage in blower assembly 2424. At block 2672, a predetermined operating range is set for the blower assembly 2424. The predetermined operating range may include a predetermined discharge pressure and/or a predetermined speed of the motor 2622. In block 2674, the speed of the motor 2622 is monitored via a speed sensor 2660. The speed of the motor 2622 is then compared to a predetermined speed range at step 2676.

At block 2678, the controller 2630 determines whether the motor 2622 is operating within a predetermined range. In block 2690, if the motor 2622 is operating within a predetermined operating range, the motor 2622 continues to operate within predetermined parameters. At block 2692, if the motor 2622 is not operating within the predetermined range, the controller 2630 determines whether the motor 2622 is operating at a speed greater than the predetermined operating range. At block 2694, if the motor 2622 is operating at a speed greater than the predetermined operating speed, the controller determines that the inlet 2624 of the blower 2570 is blocked. In some embodiments, a greater operating speed may indicate that the inlet 2528 of the blower assembly 2424 is blocked. In some embodiments, both inlet 2528 and inlet 2624 may be blocked. If the controller 2630 determines that the motor 2622 is not operating at a speed greater than the predetermined operating range, the motor 2622 must operate at a speed less than the predetermined operating range. At block 2696, the controller 2630 determines that the outlet 2572 of the blower 2570 is blocked. In some embodiments, a lower operating speed may indicate that the exhaust 2596 of the blower assembly 2424 is blocked. In some embodiments, both outlet 2572 and vent 2596 may be blocked.

Referring now to fig. 79, a graph 2700 illustrates fan operating speed 2702 in Revolutions Per Minute (RPM) in view of various operating conditions 2704. In the illustrated embodiment, the operating range 2706 of the blower assembly 2424 is between approximately 3100RPM and approximately 5100 RPM. Operating speeds greater than about 5100RPM indicate an air intake system blockage condition 2710. An operating speed of less than about 3100RPM indicates an exhaust system blockage condition 2712.

At condition 2720, where all inlets and outlets are open, the fan is operating within operating range 2706 at a speed 2722 of approximately 3500 RPM. At condition 2724, where all inlets and outlets are open and the fan is operating at a speed of about 10,000 feet, the fan is operating at 2726 at a speed of about 4100RPM within the operating range 2706. In condition 2730, where one of the inlets is closed, the fan is operating at a speed 2732 of about 5100RPM with the air inlet system blocked 2710. In condition 2740, where the outlet is fully closed, the fan is running at a speed 2742 of about 2800RPM with an exhaust system blockage condition 2712. In condition 2750, where the outlet is partially closed, the fan is operating at a speed 2752 of approximately 3100RPM in an exhaust system blockage situation 2712. Accordingly, by monitoring the speed of the blower assembly 2424, the operating condition of the blower assembly 2424 can be determined.

Referring to fig. 80, support surface 2800 includes a head end 2802, an opposing foot end 2804, a right side 2806, and a left side 2808. An X-ray cassette enclosure 2820 is disposed within the support surface 2800 and is configured to house an X-ray cassette 2822. The sleeve 2820 is sealed with a pair of zippers 2824. In some embodiments, a fastening mechanism other than the zipper 2824 may be used, such as hook and loop fasteners, and the like. Each zipper 2824 extends partially along the length 2828 of the right side 2806 and partially along the length 2828 of the left side 2808, respectively. In an exemplary embodiment, the zipper 2824 does not extend along the head end 2802 or the foot end 2804 of the support surface 2800.

As shown in fig. 81, the support surface 2800 includes an upper enclosure 2840 that is sealed to a lower enclosure 2842 by a zipper 2844. The zipper 2844 may be actuated to separate the upper enclosure 2840 from the lower enclosure 2842 to expose the interior of the support surface 2800, e.g., the air bag and other components described herein. Each zipper 2824 is positioned between the upper enclosure 2840 and the zipper 2844. In some embodiments, the two zippers 2824 are a different color than the zippers 2844 to distinguish the attachment of the sleeve 2820 to the enclosure. In some embodiments, each zipper 2824 and 2844 may have a different size to distinguish the zippers 2824, 2844.

Fig. 82 and 83 show sleeve 2820 in an open configuration, which enables insertion and removal of cartridge 2822. The sleeve 2820 includes openings 2850 on the right and left sides 2806 and 2808 that are sealed by respective zippers 2824. The cavity 2852 extends into the support surface 2800 between the openings 2850. Cavity 2852 is configured to receive cartridge 2822. Each opening 2850 extends partially along one of sides 2806 and 2808 of support surface 2800 to provide access to sleeve 2820 by a caregiver. In some embodiments, a caregiver can insert cartridge 2822 and remove cartridge 2822 from holster 2820 while a patient is positioned on support surface 2800.

Sleeve 2820 includes inner liner 2860, inner liner 2860 bonded or welded to tear resistant material 2862 of each zipper 2824 to seal sleeve 2820. In some embodiments, inner liner 2860 is welded by ultrasonic welding or radio frequency welding. Inner liner 2860 is formed from a waterproof material, such as a thermoplastic. When the zipper 2824 is closed, the sleeve 2820 is fluid-tight to prevent fluids, such as bodily fluids, from entering the sleeve 2820. Thus, jacket 2820 prevents cartridge 2822 from being exposed to fluids that may damage the cartridge.

The sleeve 2820 can be opened on both sides 2806 and 2808 to allow the sleeve 2820 to be wiped without having to remove the support surface 2800 in use. The sheath 2820 is accessible to the caregiver from either the right side 2806 or the left side 2808. In addition, the sleeve 2820 is larger than conventional sleeves, which allows full coverage from the patient's head to the patient's seat/buttocks, and allows X-ray radiation to be applied to the chest, abdomen, and buttocks. In some embodiments, sleeve 2820 may extend all the way to foot end 2804 of support surface 2800. Because the sleeve 2820 is placed over the core of the support surface 2800, the sleeve 2820 does not interfere with a microclimate system that may be bonded to the support surface 2800. The two separate compartments (sleeve 2820 and core) of support surface 2800 enable each compartment to receive a fully enclosed fire sock, thereby enabling support surface 2800 to pass a flame test. The sleeve 2820 may be mounted in the support surface 2800 with or without a top.

Referring to fig. 84, X-ray cassette 2900 includes a pouch 2902 formed of fabric. The fabric may be coated with a plastic coating, such as polyurethane. The bag 2902 includes an open end 2904, as shown in fig. 85. The cavity extends between open ends 2904. Each of a pair of endplates 2906 is connected to an end 2904 of the bag 2902. In some embodiments, the plate 2906 is welded to the bag 2902, such as by radio frequency welding. The plate 2906 includes an opening 2908 that extends through the plate 2906. When the plate 2906 is welded to the bag 2902, as shown in fig. 86, an opening 2908 in the plate 2906 is aligned with an open end 2904 of the bag 2902. As shown in FIG. 85, the upper and lower attachment members 2920 and 2922 include bag flanges 2924 and plate flanges 2926. The bag flange 2924 is welded to the bag 2902 at end 2904. The plate flange 2926 is welded to the end plate 2906 such that the open end 2904 of the bag 2902 is aligned with the opening 2908 of the plate 2906, as shown in fig. 87. A zipper 2928 is welded to each of the upper and lower attachment members 2920 and 2922. The weld seals the connecting member 2920 and the connecting member 2922 to the zipper 2928 so that fluid cannot flow into the bag 2902. FIG. 89 shows the tabs 2930 of each connecting member 2920, 2922 welded together on the ends 2932 of the zipper 2928. The welded tabs 2930 seal the ends 2930 of the zipper 2928. As shown in fig. 88, a zipper 2928 is welded to the panel 2906 and closes the opening 2908. When in the zipped state, unzipping zippers 2928 open respective openings 2908 to allow placement of X-ray cassettes into bags 2902.

Referring to fig. 90, the sleeve 2900 is welded to the bottom cover 2950 of the mattress. The bottom cover 2950 includes a bottom plate 2952, a pair of side plates 2954, a head end plate 2956, and a foot end plate 2958. The bottom plate 2952 extends between the side plates 2954 and between the head end plate 2956 and the foot end plate 2958. The sleeve 2900 is welded to the side plate 2954 adjacent the head end plate 2956. Each end plate 2906 of the sleeve 2900 is welded to a side plate 2954 of the bottom cover 2950. The sleeve 2900 is welded to the bottom cover 2950 such that the opening 2908 of the sleeve 2900 is accessible from the side plate 2954 of the bottom cover 2950. The weld and zipper 2928 are substantially fluid-proof to prevent fluid on the mattress from entering the bag 2902.

The bottom plate 2952 includes a pocket 2970, the pocket 2970 being configured to receive a component of a mattress. For example, the bag 2970 may be configured to contain a foam block (not shown). The bag 2970 is formed from a fabric material that is welded to the bottom plate 2952. The fabric material is welded on three sides, forming an opening on the fourth side. The opening provides access to the pocket 2970 for insertion of a component of a mattress. The bottom plate 2952 also includes an opening 2974, the opening 2974 being sized to receive a power line (described in detail below). As described below, the power cord extends from the air mover in the mattress to the exterior of the mattress so that the air mover can receive power from the receptacle.

Side plate 2954 includes an inlet 2980. The inlet 2980 is configured to allow air to be drawn into the mattress by the blower assembly. As shown in fig. 97, each inlet 2980 includes a body 3000 having a side wall 3002, the side wall 3002 defining a cavity 3004. The side wall 3002 includes an outer flange 3006, the outer flange 3006 being welded to the side panel 2954 of the bottom cover 2950 to prevent fluid from entering the mattress. The cover 3008 extends over a portion of the opening 3010 of the cavity 3004. Opening 3010 has an axis 3012. Fig. 98 shows a rear side 3020 of a body 3000 having an opening 3022. The opening 3022 extends from the rear side 3020 to the cavity 3004. The cover 3008 partially blocks the opening 3022 to prevent fluid from flowing into the opening 3022. During operation of the blower assembly, air flows around the cover 3008 and into the opening 3022.

The plug 3030 shown in fig. 99 is configured to be inserted into the opening 3022. The plug 3030 includes a central flange 3032 and an inlet connector 3034 extending from the central flange 3032. Plug 3030 has a passage 3044, and passage 3044 has a shaft 3046 that is coaxial with axis 3012 of opening 3010. The inlet connector 3034 is inserted into the opening 3022 such that the lip 3036 of the inlet connector 3034 engages and locks to an opening flange 3038 formed around the opening, as shown in fig. 100. The open flange 3038 extends into the cavity 3004 such that the central flange 3032 of the plug 3030 rests against the rear side 3020 of the main body 3000, as shown in fig. 101. A blower connector 3040 extends from the intermediate flange 3032 in a direction opposite the inlet connector 3034. Blower connector 3040 is configured to connect to an inlet of a blower via a tube or other suitable conduit, as described below. The blower connector 3040 includes a lip 3042 to secure the blower connector 3040 to a tube that leads to the inlet of the blower assembly. During operation, air flows around the cover 3008 and through the plug 3030 and the opening 3022 to the inlet of the blower. The cover 3008 and the opening flange 3038 cooperate to prevent fluid from entering the blower.

The head end plate 2956 includes an outlet 3050, as shown in fig. 90. The vent 3050 is configured to vent air from the mattress. As shown in fig. 92, each outlet 3050 includes a body 3052 having a sidewall 3054, the sidewall 3054 defining a cavity 3056. The side wall 3054 includes an outer flange 3058, the outer flange 3058 being welded to the head end plate 2956 of the bottom cover 2950 to prevent fluid from entering the mattress. The lid 3060 extends over a portion of the opening 3062 of the cavity 3056. Opening 3062 has a shaft 3068. Fig. 93 shows a rear side 3058 of the body 3052 with an opening 3062. The opening 3062 extends from the rear side 3058 to the cavity 3056. The lid 3060 partially blocks the opening 3062 to prevent fluid flow into the opening 3062. The side wall 3064 defining the opening 3062 includes a recess 3066.

The plug 3080 shown in fig. 94 is configured to be inserted into the opening 3062. The plug 3080 includes a flange 3082 and an outlet connector 3084 extending from the flange 3082. The plug 3080 has a channel 3092, the channel 3092 having an axis 3094, the axis 3094 being coaxial with the axis 3068 of the opening 3062. The outlet connector 3084 is inserted into the opening 3062 such that the flange 3086 of the outlet connector 3084 engages and locks to an opening flange 3090 formed around the opening 3062, as shown in FIG. 95. The open flange 3090 extends into the cavity 3056 such that the flange 3082 of the plug 3080 rests on the rear side 3058 of the body 3052, as shown in fig. 96. Referring back to fig. 94, lip 3100 extends from bottom end 3102 of outlet connector 3084 and into cavity 3056, as shown in fig. 95. A tab 3104 is provided on the outlet connector 3084 and is configured to engage the notch 3066 to prevent rotation of the lip 3100.

During operation, air is expelled from the mattress through openings 3062. The lid 3060, opening flange 3090 and lip 3100 prevent fluid from entering the outlet 3050. When the head end of the mattress is substantially horizontal, fluid is prevented from entering the exit 3050 by the cover 3060 and the opening flange 3090. However, when the head end of the mattress is raised at a head tilt angle between 0 and 65 degrees, fluid from the mattress may begin to accumulate in the exit 3050 cavity 3056. The lip 3100 prevents these fluids from flowing into the opening 3062. That is, the lip 3100 is sized such that fluid collected in the cavity 3056 will flow out of the cavity along the head end of the mattress before flowing back into the mattress through the opening 3062.

Referring to fig. 91, the mattress 3200 includes a bottom cover 2950 and a sleeve 2900 welded to the bottom cover 2950. Blower assembly 3202 is within mattress 3200. The blower assembly 3202 is shown in fig. 102 and includes a housing 3204, the housing 3204 housing a fan (or blower) 3206 in a chamber 3208. A Universal Serial Bus (USB) port 3214 is disposed within the housing 3204 to provide diagnostic access to the blower assembly 3202. The housing 3204 includes an outlet 3210, the outlet 3210 being in fluid communication with an outlet 3050 disposed in the head end plate 2956 of the bottom cover 2950. A pair of tubes 3212 extend from the housing 3204 and are in fluid communication with an inlet 2980 formed in the side plate 2954 of the bottom cap 2950. Power receptacle 3220 of housing 3204 is configured to connect to power line 3222, as shown in fig. 91. Fig. 91 shows power lines 3222 extending toward head end 3230 of mattress 3200; however, it should be understood that the power lines 3222 extend through openings 2974 in the bottom plate 2952 of the bottom cover 2950, as described below. The opening 2974 is sealed around the power line 3222, as described below, to prevent fluid from entering through the opening 2974.

Still referring to fig. 91, a foam-filled bladder 3240 is positioned adjacent blower assembly 3202 and extends between blower assembly 3202 and head end plate 2956 of bottom cover 2950. The bladder 3240 includes an inlet valve (not shown) that allows ambient air to flow into the bladder 3240. Ambient air passes through the bladder 3240 and exits through the outlet valve 3242. The air bags 3240 are arranged in rows and extend laterally between the side panels 2954 of the bottom cover 2950. Foam sheet 3250 surrounds air bag 3240 and blower assembly 3202. The foot end 3252 of the foam slab 3250 includes a hole 3254, the hole 3254 enabling the foot end 3252 of the foam slab 3250 to extend and retract, as indicated by the extension and retraction of the foot portion of the bed frame (not shown). Opening 3256 extends through foam plate 3250 and aligns with outlet 3210 of blower assembly 3202.

A Micro Climate Management (MCM) layer 3260 is disposed above the foam sheet 3250 and is connected to the bottom cover 2950 by a zipper. The MCM layer 3260 is enclosed in a fire sock. The inlet 3262 of layer 3260 extends from a foot end 3264 of layer 3260. The inlet 3262 is configured to fold down and extend through an opening 3256 in the foam panel 3250. Inlet 3262 is connected to outlet 3210 of blower assembly 3202. In some embodiments, inlet 3262 is secured around outlet 3210 of blower assembly 3202 with hook and loop fasteners, snaps, or the like.

A fire sock 3270 surrounds the foam sheet 3250 and the air bladder 3240. A fire sock 3270 is positioned over the sleeve 2900. The blower assembly 3202 is positioned outside of the fire sock 3270. A hole is cut in the fire sock to connect the microclimate management layer 3260 to the blower assembly 3202. The fire hose 3270 is secured to the foam panel 3250 by a retaining flange 3251 attached to the foam panel 3250. A hole is cut in the stocking 3270 to receive the end of the flange 3251. The top cover 3272 is connected to the bottom cover 2950 by a zipper to seal the mattress 3200.

Referring now to fig. 103, the control circuit 3300 is housed within a housing 3204 of the blower assembly 3202. Control circuit 3300 includes a control board 3001 having a USB port 3214, USB port 3214 is connected to a USB diagnostic device 3216, and USB diagnostic device 3216 receives diagnostic information about blower assembly 3202 to power blower 3206. Another port 3302 provides power to blower assembly 3202 and controls signals to blower assembly 3202. There are two options available for powering the control circuit 3300. First, the control circuit 3300 may be powered by the frame 3304 of the patient support device (not shown). In such embodiments, power cables from the frame 3304 are plugged into the receptacles 3221 of the housing 3204. Frame 3304 includes a power source 3306, e.g., a 28 volt power source, from which power may be supplied to control board 3301 and blower 3206.

In another embodiment, the control circuit 3300 is powered by an external power source, such as a wall outlet. In such embodiments, the power line 3222 is connected to a wall outlet. The power line 3222 is connected to an ac/dc power source 3312, and the ac/dc power source 3312 is connected to a receptacle 3220 of the housing 3204. Ground lugs 3314 extend from receptacle 3220. To provide a graphical user interface, the user interface device 3320 is connected to an interface port 3322 of the control unit 3300. In some embodiments, the device 3320 may be connected to a frame of the patient support device.

As shown in fig. 104, positive terminal 3350 and negative terminal 3352 extend from receptacle 3220 to power supply 3212 to power control board 3301. Ground wire 3354 extends from receptacle 3220 to ground plate 3356. Another ground wire 3358 extends from ground plate 3356 to bolt 3357 that extends through housing 3204. A cable 3360 extends from the power source 3312 to the control board 3301. Cable 3360 provides power to operate blower 3206 of blower assembly 3202 and other components of control board 3301.

Referring now to fig. 105, the ground wire 3380 is connected to a bolt 3357 extending through the housing 3204 and routed along the power line 3222. The ground wire 3380 and the power wire 3222 are sheathed together with a covering 3384 and extend to the overmold 3382. Power lines 3222 pass through overmold 3382 and extend to respective plugs. As shown in fig. 106, the ground wire 3380 is inserted into the overmold 3382 and connected to the grounding lug 3314, the grounding lug 3314 extending from the other side of the overmold 3382. Grounding lugs 3314 enable ground continuity tests (which drive high currents through ground) and monitor maximum impedance. In some embodiments, the alligator clip is attached to grounding lug 3380 on overmold 3382, and power line 3222 is plugged into a machine that measures impedance.

The overmold 3382 includes a pair of ridges 3390 that form a recess 3392. That is, a recess 3392 is formed between the ridges 3390 and is configured to receive a clip or lace. As shown in fig. 107, a slightly frustoconical umbilical 3400 extends from an opening 2974 in the bottom cover 2950 of the mattress 3200. Power line 3222 extends through umbilical 3400. As shown in fig. 108, the umbilical 3400 is pulled over the overmold 3382 and a clamp or tie 3402 is secured around the end of the umbilical and the overmold 3382. The strap 3402 is secured within the recess 3392 such that the ridge 3390 prevents movement of the strap 3402. By connecting umbilical 3400 to overmold 3382, power lines 3222 are allowed to exit mattress 3200 while maintaining a substantially fluid-tight seal that prevents fluid from entering mattress 3200.

While the present disclosure is directed to multiple embodiments, it is to be understood that aspects of each embodiment can be used with other embodiments described herein.

Although the present disclosure is directed to particular embodiments, workers skilled in the art will recognize that changes may be made in form and detail without departing from the subject matter set forth in the following claims.