阅读说明：本技术 一种静脉通路监测仪 (Vein access monitor ) 是由 迟骋 于 2021-06-16 设计创作，主要内容包括：本发明公开了一种静脉通路监测仪,其特征在于,包括：机壳、转接管、卡套接头、显示器、圆孔、按键、超声波检测模块、硅压传感器、蜂鸣器、电池、集成电路板、中控芯片、存储器、数模转换器；本发明可在进行静脉通路治疗时监测管腔内压力,同时在监测过程中可检测出静脉通路内液体流速、注入流量和静脉通路的管径,且可在静脉通路发生堵塞时第一时间发出报警信号提示医护人员。(The invention discloses a vein access monitor, which is characterized by comprising: the device comprises a shell, a switching tube, a clamping sleeve joint, a display, a round hole, a key, an ultrasonic detection module, a silicon pressure sensor, a buzzer, a battery, an integrated circuit board, a central control chip, a memory and a digital-to-analog converter; the invention can monitor the pressure in the lumen when vein access treatment is carried out, can detect the flow velocity, the injection flow and the pipe diameter of the vein access in the monitoring process, and can send out an alarm signal to prompt medical care personnel at the first time when the vein access is blocked.)

1. A venous access monitor, comprising: the device comprises a shell, a switching tube, a clamping sleeve joint, a display, a round hole, a key, an ultrasonic detection module, a silicon pressure sensor, a buzzer, a battery, an integrated circuit board, a central control chip, a memory and a digital-to-analog converter;

the two ends of the shell are respectively connected with a switching tube and are communicated with the pipeline in the shell, the two switching tubes are both in threaded connection with a clamping sleeve joint, and the two switching tubes are connected with the venous access conduit or the extracorporeal conduit through the clamping sleeve joints; the upper end face of the shell is connected with a display and a key, the upper end face of the shell is provided with a round hole, and the lower end of the round hole is internally provided with a buzzer inside the shell; the ultrasonic detection modules are connected to two sides of the pipeline in the shell, and a silicon pressure sensor is arranged on the inner wall of the pipeline of the shell; the interlayer of the shell is internally provided with a battery, an integrated circuit board, a central control chip, a memory and a digital-analog converter.

2. The venous access monitor of claim 1, wherein a conduit extends through the housing from left to right, and an interlayer is disposed on the outside of the conduit within the housing.

3. The venous access monitor according to claim 1, wherein the button, the buzzer, the ultrasonic detection module, the silicon pressure sensor, the buzzer and the battery are electrically connected to an integrated circuit board, the central control chip, the memory and the digital-to-analog converter are connected to the integrated circuit board, the memory and the digital-to-analog converter are connected to the central control chip through a line on the integrated circuit board, and the display is electrically connected to the digital-to-analog converter; the integrated circuit board is provided with a signal amplifying circuit, an A/D conversion circuit, a control circuit and the like.

4. A venous access monitor according to claim 1 or claim 3 wherein the ultrasound detection module comprises an ultrasound transmitter and receiver, two pairs of ultrasound transmitters and two pairs of receivers being mounted at a distance L upstream and downstream of the conduit respectively, the ultrasound transmitters and receivers being electrically connected to the integrated circuit board.

5. The principle and method of use of a venous access monitor according to any of claims 1-4, wherein:

firstly, the exposed outer end of the venous access is connected with a switching tube of a monitor, and a ferrule connector is screwed to fix the venous access and the ferrule connector together, and the other switching tube of the monitor is connected with an external catheter and is screwed with the ferrule connector to fix the venous access and the ferrule connector in the same way; secondly, the monitor is started by controlling the key to monitor the pressure in the venous access catheter, and the flow velocity and flow of liquid in the venous access catheter and the diameter of the venous access can be detected; finally, the data information monitored in real time can be seen on the display, and meanwhile, when the venous access is blocked, a sound is sent to prompt medical care personnel;

a. measurement of intravenous access pressure principle:

the silicon pressure sensor monitors the pressure in the pipeline in real time, transmits signals to the integrated circuit board, converts electric signals into digital signals through the signal amplifying circuit and the A/D conversion circuit and then transmits the digital signals to the central control chip, and the operating program of the central control chip processes the signals, transmits the processed signals to the digital-to-analog converter, converts the processed signals into analog signals and sends the analog signals to the display to be displayed;

b. the principle of measuring the flow velocity, flow and pipe diameter in the vein passage pipe cavity is as follows:

as shown in FIG. 3, two pairs of ultrasonic transmitters (T) are installed upstream and downstream of the pipe 101 at a distance L, respectively₁、T₂)701 and receiver (R)₁、R₂) And 702, assuming that the propagation speed of the ultrasonic wave in the stationary fluid is c and the velocity of the fluid is u, the relationship between the time t1 and t2 required for the ultrasonic wave to reach the receivers R1 and R2 and the flow rate isSince the flow velocity of the fluid is small relative to the speed of sound, i.e. c ≧ u, negligible, a time difference is obtained So that the fluid velocity can be obtained

The flow velocity u obtained as described above is the average flow velocity over the ultrasonic propagation path, which is the average flow velocity of the cross sectionAre not identical and therefore require knowledge of the cross-sectional average flow velocity in determining the flow equationAnd the measured value u, this relationship depending on the flow velocity distribution over the cross section; in laminar flow regime (Re)<2300) Can deduceWhen the flow state is turbulent, the relationship between the measured value and the cross-sectional average flow velocity can be expressed asIs a function of Reynolds number corridor at Re<10⁵When k is 1.119-0. OllgRe;

at Re ≥ 10⁵When the temperature of the water is higher than the set temperature,after the relation between the measured value and the cross-section average flow velocity exists, the flow equation of the fluid can be obtained as

When the monitoring function is started, the central control chip operates a program in the memory and sends out a signal, the ultrasonic transmitter sends out an ultrasonic wave signal, the receiver receives the signal and transmits the signal to the integrated circuit board, the signal is processed by the signal amplification circuit and the A/D conversion circuit and then transmitted to the central control chip, the program operated by the central control chip calculates the flow velocity and the flow rate in the pipeline according to the principle, and simultaneously calculates the pipe diameter of the venous access according to the detected data; the program operated by the central control chip simultaneously transmits the signal to the digital-to-analog converter to be converted into an analog signal and transmits the analog signal to the display to be displayed;

c. principle of abnormal alarm

After the program operated by the central control chip receives and processes the signal, if the flow rate in the measured venous access catheter is 0, the alarm program is started to send a signal to the control circuit, the power supply of the buzzer is communicated, and the buzzer sends out sound to prompt medical staff.

6. A venous access monitor according to any one of claims 1 to 7, for use in venous access therapy.

Technical Field

The invention belongs to the technical field of biology, and particularly relates to a venous access monitor.

Background

The venous access is that a blood vessel venous access is established for treatment such as infusion, blood transfusion, medication and the like, the venous access generally comprises a peripheral blood vessel venous access and a deep venous access, the peripheral blood vessel venous access is generally used for hospitalized patients, particularly critical patients all need to establish related access for rescue treatment of the patients and other measures, the peripheral blood vessel venous access is generally located in blood vessels such as a forearm cephalic vein, an external jugular vein and the like, and patients with extremely poor blood vessels can be treated by the deep venous access; the deep vein blood vessel access mainly refers to femoral vein, internal jugular vein and subclavian vein, and the blood vessel access can be used for blood purification treatment of patients besides conventional treatment; in clinic, no method is available for monitoring intraluminal conditions, such as intraluminal pressure, fluid flow rate, input flow and intraluminal diameter, and the conditions cannot be known in the first time when blockage occurs, and are often detected after the blockage occurs, so that the body of a patient is damaged and the treatment process is influenced; therefore, the invention provides a venous access monitor which can monitor the pressure in a lumen when venous access treatment is carried out, can detect the flow velocity, the injection flow and the pipe diameter of a venous access in the monitoring process, and can send an alarm signal to prompt medical staff at the first time when the venous access is blocked.

Disclosure of Invention

The invention provides a venous access monitor, which can monitor the pressure in a lumen when venous access treatment is carried out, can detect the flow velocity, the injection flow and the pipe diameter of a venous access in the monitoring process, and can send an alarm signal to prompt medical staff at the first time when the venous access is blocked.

In order to achieve the above technical object, the present invention adopts a technical solution in which a venous access monitor includes: the device comprises a shell, a switching tube, a clamping sleeve joint, a display, a round hole, a key, an ultrasonic detection module, a silicon pressure sensor, a buzzer, a battery, an integrated circuit board, a central control chip, a memory and a digital-to-analog converter;

the two ends of the shell are respectively connected with a switching tube and are communicated with the pipeline in the shell, the two switching tubes are both in threaded connection with a clamping sleeve joint, and the two switching tubes are connected with the venous access conduit or the extracorporeal conduit through the clamping sleeve joints; the upper end face of the shell is connected with a display and a key, the upper end face of the shell is provided with a round hole, and the lower end of the round hole is internally provided with a buzzer inside the shell; the ultrasonic detection modules are connected to two sides of the pipeline in the shell, and a silicon pressure sensor is arranged on the inner wall of the pipeline of the shell; a battery, an integrated circuit board, a central control chip, a memory and a digital-to-analog converter are arranged in the interlayer of the shell;

furthermore, a pipeline penetrates through the interior of the shell from left to right, and an interlayer is arranged on the outer side of the pipeline in the shell;

furthermore, the key, the buzzer, the ultrasonic detection module, the silicon pressure sensor, the buzzer and the battery are electrically connected to the integrated circuit board, the central control chip, the memory and the digital-to-analog converter are connected to the integrated circuit board, the memory and the digital-to-analog converter are connected to the central control chip through a circuit on the integrated circuit board, and the display is electrically connected with the digital-to-analog converter; the integrated circuit board is provided with a signal amplifying circuit, an A/D conversion circuit, a control circuit and the like;

furthermore, the ultrasonic detection module comprises an ultrasonic transmitter and a receiver, two pairs of ultrasonic transmitters and two pairs of receivers are respectively installed at the positions of the upstream and downstream of the pipeline at a distance L, and the ultrasonic transmitters and the receivers are electrically connected to the integrated circuit board;

another object of the present invention is to provide a principle method of using a venous access monitor, comprising:

firstly, the exposed outer end of the venous access is connected with a switching tube of a monitor, and a ferrule connector is screwed to fix the venous access and the ferrule connector together, and the other switching tube of the monitor is connected with an external catheter and is screwed with the ferrule connector to fix the venous access and the ferrule connector in the same way; secondly, the monitor is started by controlling the key to monitor the pressure in the venous access catheter, and the flow velocity and flow of liquid in the venous access catheter and the diameter of the venous access can be detected; finally, the data information monitored in real time can be seen on the display, and meanwhile, when the venous access is blocked, a sound is sent to prompt medical care personnel;

a. measurement of intravenous access pressure principle:

the silicon pressure sensor monitors the pressure in the pipeline in real time, transmits signals to the integrated circuit board, converts electric signals into digital signals through the signal amplifying circuit and the A/D conversion circuit and then transmits the digital signals to the central control chip, and the operating program of the central control chip processes the signals, transmits the processed signals to the digital-to-analog converter, converts the processed signals into analog signals and sends the analog signals to the display to be displayed;

b. the principle of measuring the flow velocity, flow and pipe diameter in the vein passage pipe cavity is as follows:

as shown in FIG. 3, two pairs of ultrasonic transmitters (T) are installed upstream and downstream of the pipe 101 at a distance L, respectively₁、T₂)701 and receiver (R)₁、R₂) And 702, assuming that the propagation speed of the ultrasonic wave in the stationary fluid is c and the velocity of the fluid is u, the relationship between the time t1 and t2 required for the ultrasonic wave to reach the receivers R1 and R2 and the flow rate isSince the flow velocity of the fluid is small relative to the speed of sound, i.e., c ≧ u, can be ignored, it can be obtainedDifference (D) So that the fluid velocity can be obtained

The flow velocity u obtained as described above is the average flow velocity over the ultrasonic propagation path, which is the average flow velocity of the cross sectionAre not identical and therefore require knowledge of the cross-sectional average flow velocity in determining the flow equationAnd the measured value u, this relationship depending on the flow velocity distribution over the cross section; in laminar flow regime (Re)<2300) Can deduceWhen the flow state is turbulent, the relationship between the measured value and the cross-sectional average flow velocity can be expressed asIs a function of Reynolds number corridor at Re<10⁵When k is 1.119-0. OllgRe;

at Re ≥ 10⁵When the temperature of the water is higher than the set temperature,after the relation between the measured value and the cross-section average flow velocity exists, the flow equation of the fluid can be obtained as

When the monitoring function is started, the central control chip operates a program in the memory and sends out a signal, the ultrasonic transmitter sends out an ultrasonic wave signal, the receiver receives the signal and transmits the signal to the integrated circuit board, the signal is processed by the signal amplification circuit and the A/D conversion circuit and then transmitted to the central control chip, the program operated by the central control chip calculates the flow velocity and the flow rate in the pipeline according to the principle, and simultaneously calculates the pipe diameter of the venous access according to the detected data; the program operated by the central control chip simultaneously transmits the signal to the digital-to-analog converter to be converted into an analog signal and transmits the analog signal to the display to be displayed;

c. principle of abnormal alarm

After the program operated by the central control chip receives and processes the signal, if the flow rate in the measured venous access catheter is 0, the alarm program is started to send a signal to the control circuit, the power supply of the buzzer is communicated, and the buzzer sends out sound to prompt medical staff.

The invention has the beneficial effects that:

1. the venous access monitor can monitor the pressure in the lumen when venous access treatment is carried out, and the pressure is delivered to the display for display, so that medical staff can conveniently control the conditions in the treatment process;

2. the venous access monitor can detect the flow velocity, the injection flow and the pipe diameter of a venous access in the monitoring process, and is convenient to adjust the speed of the input liquid and control the amount of the input liquid;

3. this vein access monitor can send alarm signal to indicate medical personnel the very first time when vein access takes place to block up, avoids vein access to block up the influence treatment progress.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a block diagram of a venous access monitor;

FIG. 2 is a cross-sectional view of a venous access monitor;

FIG. 3 is a schematic diagram of an ultrasonic testing of a venous access monitor;

in the drawings, the components represented by the respective reference numerals are listed below:

the device comprises a shell, a pipeline, an interlayer, a 2-adapter tube, a 3-ferrule connector, a 4-display, a 5-round hole, a 6-key, a 7-ultrasonic detection module, a 701-ultrasonic transmitter, a 702-ultrasonic receiver, an 8-silicon pressure sensor, a 9-buzzer, a 10-battery, an 11-integrated circuit board, a 12-central control chip, a 13-memory and a 14-digital-to-analog converter.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1 to 3, a structure of a venous access monitor includes: the device comprises a shell 1, a switching tube 2, a ferrule connector 3, a display 4, a round hole 5, a key 6, an ultrasonic detection module 7, a silicon pressure sensor 8, a buzzer 9, a battery 10, an integrated circuit board 11, a central control chip 12, a memory 13 and a digital-to-analog converter 14;

the two ends of the shell 1 are respectively connected with one adapter tube 2 and are communicated with the pipeline 101 in the shell 1, the two adapter tubes 2 are both in threaded connection with one clamping sleeve joint 3, and the two adapter tubes 2 are connected with a venous access conduit or an extracorporeal conduit through the clamping sleeve joints 3; the upper end face of the shell 1 is connected with a display 4 and a key 6, the upper end face of the shell 1 is provided with a round hole 5, and the lower end of the round hole 5 is provided with a buzzer 9 inside the shell 1; two sides of a pipeline 101 in the machine shell 1 are connected with ultrasonic detection modules 7, and the inner wall of the pipeline 101 of the machine shell 1 is provided with a silicon pressure sensor 8; a battery 10, an integrated circuit board 11, a central control chip 12, a memory 13 and a digital-to-analog converter 14 are arranged in the interlayer 102 of the shell 1; the monitor is used for displaying monitored data, the key is used for selecting functions, the buzzer is used for making a sound to prompt medical staff, the battery is used for providing an operating power supply for the detector, the central control chip maintains the operation of the device, the memory is used for storing data and programs, and the digital-to-analog converter is used for converting digital signals into analog signals;

a pipeline 101 penetrates through the interior of the machine shell 1 from left to right, and an interlayer 102 is arranged on the outer side of the pipeline 101 in the machine shell 1;

the key 6, the buzzer 9, the ultrasonic detection module 7, the silicon pressure sensor 8, the buzzer 9 and the battery 10 are electrically connected to the integrated circuit board 11, the central control chip 12, the memory 13 and the digital-to-analog converter 14 are connected to the integrated circuit board 11, the memory 13 and the digital-to-analog converter 14 are connected to the central control chip 12 through a circuit on the integrated circuit board 11, and the display 4 is electrically connected to the digital-to-analog converter 14; the integrated circuit board 11 is provided with a signal amplifying circuit, an A/D conversion circuit, a control circuit and the like, so that analog signals can be converted into digital signals conveniently;

the ultrasonic detection module 7 comprises an ultrasonic transmitter 701 and a receiver 702, two pairs of ultrasonic transmitters 701 and two pairs of receivers 702 are respectively installed at a distance L between the upstream and downstream of the pipeline 101, and both the ultrasonic transmitters 701 and the receivers 702 are electrically connected to the integrated circuit board 11.

The operation principle and the specific use method are as follows:

firstly, the exposed outer end of the venous access is connected with one adapter tube 2 of the monitor, and the ferrule connector 3 is screwed to fix the two together, the other adapter tube 2 of the monitor is connected with an external catheter, and the ferrule connector 3 is screwed to fix in the same way; secondly, the control button 6 starts the monitor to monitor the pressure in the venous access catheter, and can detect the flow velocity and flow of the liquid in the venous access catheter and the diameter of the venous access catheter; finally, the data information monitored in real time can be seen on the display 4, and meanwhile, when the venous access is blocked, a sound is sent to prompt medical care personnel;

a. measurement of intravenous access pressure principle:

the silicon pressure sensor 8 monitors the pressure in the pipeline 101 in real time, transmits signals to the integrated circuit board 11, converts electric signals into digital signals through the signal amplifying circuit and the A/D conversion circuit and then transmits the digital signals to the central control chip 12, and a program operated by the central control chip 12 processes the signals and transmits the digital signals to the digital-to-analog converter 14 to convert the digital signals into analog signals which are transmitted to the display 4 to be displayed;

b. the principle of measuring the flow velocity, flow and pipe diameter in the vein passage pipe cavity is as follows:

as shown in FIG. 3, two pairs of ultrasonic transmitters (T) are installed upstream and downstream of the pipe 101 at a distance L, respectively₁、T₂)701 and receiver (R)₁、R₂) And 702, assuming that the propagation speed of the ultrasonic wave in the stationary fluid is c and the velocity of the fluid is u, the relationship between the time t1 and t2 required for the ultrasonic wave to reach the receivers R1 and R2 and the flow rate isSince the flow velocity of the fluid is small relative to the speed of sound, i.e. c ≧ u, negligible, a time difference is obtained So that the fluid velocity can be obtained

The flow velocity u obtained as described above is the average flow velocity over the ultrasonic propagation path, which is the average flow velocity of the cross sectionAre not identical and therefore require knowledge of the cross-sectional average flow velocity in determining the flow equationAnd the measured value u, this relationship depending on the flow velocity distribution over the cross section; in laminar flow regime (Re)<2300) Can deduceWhen the flow state is turbulent, the relationship between the measured value and the cross-sectional average flow velocity can be expressed asIs a function of Reynolds number corridor at Re<10⁵When k is 1.119-0. OllgRe;

at Re ≥ 10⁵When the temperature of the water is higher than the set temperature,after the relation between the measured value and the cross-section average flow velocity exists, the flow equation of the fluid can be obtained as

When the monitoring function is started, the central control chip 12 runs the program in the memory 13 and sends out a signal, the ultrasonic transmitter 701 sends out an ultrasonic wave signal, the receiver 702 receives the signal and transmits the signal to the integrated circuit board 11, the signal is processed by the signal amplification circuit and the A/D conversion circuit and then transmitted to the central control chip 12, the program run by the central control chip 12 calculates the flow velocity and the flow rate in the pipeline 101 according to the principle, and simultaneously calculates the pipe diameter of the venous access according to the detected data; the program operated by the central control chip 11 simultaneously transmits the signal to the digital-to-analog converter 14 to be converted into an analog signal and transmits the analog signal to the display 4 for display;

c. principle of abnormal alarm

After the program operated by the central control chip 11 receives and processes the signal, if the flow rate in the measured venous access catheter is 0, the alarm program is started to send a signal to the control circuit, the power supply of the buzzer 9 is connected, and the buzzer 9 sends out sound to prompt medical staff.

In conclusion, the vein access monitor can monitor the pressure in the lumen when vein access treatment is carried out, and send the pressure to the display for display, so that medical staff can conveniently control the conditions in the treatment process;

2. the venous access monitor can detect the flow velocity, the injection flow and the pipe diameter of a venous access in the monitoring process, and is convenient to adjust the speed of the input liquid and control the amount of the input liquid;

3. this vein access monitor can send alarm signal to indicate medical personnel the very first time when vein access takes place to block up, avoids vein access to block up the influence treatment progress.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.