阅读说明：本技术 一种心血管治疗用血液循环装置 (Blood circulation device for cardiovascular treatment ) 是由 张瑞娟 石燕芳 任胜洪 于 2019-12-23 设计创作，主要内容包括：本发明涉及医疗器械领域,具体公开了一种心血管治疗用血液循环装置,包括套筒、设在套筒内的转子及设在套筒外用于驱动转子旋转的驱动装置,套筒的轴向两端分别设有进液口及出液口,转子包括与套筒同轴设置的转子圆筒及固定在转子圆筒内壁的转子叶片,转子的中部形成中空血液流道；套筒的进液口以可拆卸方式连接进液管道,套筒的出液口以可拆卸方式连接出液管道；进液管道的内壁粘贴有第一光纤光栅,出液管道的内壁粘贴有第二光纤光栅,第一光纤光栅、第二光纤光栅分别通过第一光纤、第二光纤从进液管道、出液管道引出后连接于解调仪。本发明能够实时检测血液在泵送前后的温度。(The invention relates to the field of medical instruments, and particularly discloses a blood circulation device for cardiovascular treatment, which comprises a sleeve, a rotor arranged in the sleeve and a driving device arranged outside the sleeve and used for driving the rotor to rotate, wherein the two axial ends of the sleeve are respectively provided with a liquid inlet and a liquid outlet; the liquid inlet of the sleeve is detachably connected with a liquid inlet pipeline, and the liquid outlet of the sleeve is detachably connected with a liquid outlet pipeline; the inner wall of the liquid inlet pipeline is pasted with a first fiber bragg grating, the inner wall of the liquid outlet pipeline is pasted with a second fiber bragg grating, and the first fiber bragg grating and the second fiber bragg grating are respectively connected to the demodulator after being led out from the liquid inlet pipeline and the liquid outlet pipeline through a first optical fiber and a second optical fiber. The invention can detect the temperature of the blood before and after pumping in real time.)

1. A blood circulation device for cardiovascular treatment comprises a sleeve, a rotor arranged in the sleeve and a driving device arranged outside the sleeve and used for driving the rotor to rotate, wherein a liquid inlet and a liquid outlet are respectively arranged at two axial ends of the sleeve, the rotor comprises a rotor cylinder coaxially arranged with the sleeve and rotor blades fixed on the inner wall of the rotor cylinder, and a hollow blood flow channel is formed in the middle of the rotor; the method is characterized in that:

the liquid inlet of the sleeve is detachably connected with a liquid inlet pipeline, and the liquid outlet of the sleeve is detachably connected with a liquid outlet pipeline; the liquid inlet pipeline is characterized in that a first fiber grating is pasted on the inner wall of the liquid outlet pipeline, a second fiber grating is pasted on the inner wall of the liquid outlet pipeline, and the first fiber grating and the second fiber grating are respectively connected to the demodulator after being led out from the liquid inlet pipeline and the liquid outlet pipeline through a first optical fiber and a second optical fiber.

2. A cardiovascular therapeutic blood circulation device according to claim 1, wherein: the axial both ends of telescopic homogeneous is equipped with first ring flange, the one end of being connected with the muffjoint on inlet pipe and the drain pipe also is equipped with the second ring flange of being connected with first ring flange correspondence.

3. A cardiovascular therapeutic blood circulation device according to claim 1, wherein: a drainage channel is arranged in the liquid outlet pipeline, and the drainage channel is gradually narrowed along the blood flow direction and is used for draining peripheral blood flow to middle blood flow.

4. A cardiovascular therapeutic blood circulation device according to claim 3, wherein: the drainage channel is in a round table shape and is arranged coaxially with the sleeve.

5. A cardiovascular therapeutic blood circulation device according to claim 4, wherein: a truncated cone-shaped drainage cylinder is coaxially fixed in the liquid outlet pipeline, two ends of the drainage cylinder are opened, the drainage cylinder is hollow, and the hollow part of the drainage cylinder forms the drainage channel.

6. A cardiovascular therapeutic blood circulation device according to claim 5, wherein: the drainage tube is fixed in the liquid outlet pipeline through a support, and a gap is formed between the side wall of the drainage tube and the inner wall of the liquid outlet pipeline.

7. A cardiovascular therapeutic blood circulation device according to claim 6, wherein: the support comprises at least three support rods, one end of each support rod is fixed on the side wall of the drainage cylinder, the other end of each support rod is fixed on the inner wall of the liquid outlet pipeline, and the support rods are uniformly distributed along the circumferential direction.

8. A cardiovascular therapeutic blood circulation device according to claim 7, wherein: the ratio of the diameter of the small-diameter end opening of the drainage tube to the diameter of the large-diameter end opening of the drainage tube is 1 (3-6).

9. A cardiovascular therapeutic blood circulation device according to claim 8, wherein: and the side wall parts for forming the mouth parts at the two ends of the drainage tube are all arc transition structures.

10. A cardiovascular therapeutic blood circulation device according to any of claims 1 to 9, wherein: the rotor blade is of a spiral blade type structure arranged on the inner wall of the rotor cylinder, and a spiral blood flow channel is formed between the side wall of the rotor blade and the inner wall of the rotor cylinder;

the driving device comprises an electromagnetic driving coil and a controller, a permanent magnet is embedded on the outer surface of the rotor cylinder, and the controller controls the size and the direction of current in the electromagnetic driving coil to generate an alternating magnetic field matched with the permanent magnet so as to drive the rotor cylinder to rotate;

the telescopic inner wall is equipped with rotor mounting groove and is located rotor mounting groove both ends and with the bearing mounting groove of rotor mounting groove intercommunication, the rotor drum is installed in the rotor mounting groove through the ceramic bearing who locates the bearing mounting groove, and the installation back the inner wall of rotor drum is level with telescopic inner wall mutually.

Technical Field

The invention relates to the field of medical instruments, in particular to a blood circulation device for cardiovascular treatment.

Background

The statistics of the world health organization show that cardiovascular diseases are the first killers threatening the health of human beings and account for about 30 percent of the total death population in the world, and the effective way for treating the end-stage heart failure is heart transplantation or the adoption of an implanted auxiliary artificial heart. Although heart transplantation has been achieved with great success, the problem of heart donors is difficult to solve, and the development of long-term implantable micro-blood pumps (i.e., blood circulation devices) is extremely important and urgent. The blood circulation device for clinical application mainly takes an axial flow pump structure as a main part, and the axial flow pump structure has better flow performance than a centrifugal pump structure and can provide larger blood flow.

The conventional blood circulation device is shown in patent CN 201894758U, and comprises a sleeve, a rotor arranged in the sleeve, and a driving device arranged outside the sleeve and used for driving the rotor to rotate, wherein the rotor comprises a rotor cylinder coaxially arranged with the sleeve and rotor blades fixed on the inner wall of the rotor cylinder, and a hollow blood flow channel is formed in the middle of the rotor. However, the blood pump has an influence on the blood temperature during the operation process, and the temperature change has a large influence on the constant-temperature animals, because the temperature is an important allosteric factor of hemoglobin and red blood cells, and the small change of the temperature can cause the obvious change of the molecular structure, concentration and function of the hemoglobin and the shape, structure and function of the red blood cells; blood temperature sensing of blood pumps is therefore of increasing importance, and the aforementioned blood circulation devices are clearly lacking in this function.

Therefore, in order to solve the above problems, there is a need for a cardiovascular treatment blood circulation device capable of detecting the temperature of blood before and after pumping in real time.

Disclosure of Invention

The invention aims to provide a blood circulation device for cardiovascular treatment, which can detect the temperature of blood before and after pumping in real time.

The purpose of the invention is realized by the following technical scheme:

a blood circulation device for cardiovascular treatment comprises a sleeve, a rotor arranged in the sleeve and a driving device arranged outside the sleeve and used for driving the rotor to rotate, wherein a liquid inlet and a liquid outlet are respectively arranged at two axial ends of the sleeve, the rotor comprises a rotor cylinder coaxially arranged with the sleeve and rotor blades fixed on the inner wall of the rotor cylinder, and a hollow blood flow channel is formed in the middle of the rotor;

the liquid inlet of the sleeve is detachably connected with a liquid inlet pipeline, and the liquid outlet of the sleeve is detachably connected with a liquid outlet pipeline; the liquid inlet pipeline is characterized in that a first fiber grating is pasted on the inner wall of the liquid outlet pipeline, a second fiber grating is pasted on the inner wall of the liquid outlet pipeline, and the first fiber grating and the second fiber grating are respectively connected to the demodulator after being led out from the liquid inlet pipeline and the liquid outlet pipeline through a first optical fiber and a second optical fiber.

Preferably, the two axial ends of the sleeve are provided with a first flange in a unified manner, and one ends of the liquid inlet pipeline and the liquid outlet pipeline, which are connected with the sleeve, are also provided with a second flange correspondingly connected with the first flange.

Preferably, a drainage channel is arranged in the liquid outlet pipeline, and the drainage channel is gradually narrowed along the blood flow direction and is used for draining the peripheral blood flow to the middle blood flow.

Preferably, the drainage channel is in a circular truncated cone shape and is arranged coaxially with the sleeve.

Preferably, a truncated cone-shaped drainage cylinder is coaxially fixed in the liquid outlet pipeline, two ends of the drainage cylinder are opened, the drainage cylinder is hollow, and the hollow part of the drainage cylinder forms the drainage channel.

Preferably, the drainage tube is fixed in the liquid outlet pipeline through a bracket, and a gap is formed between the side wall of the drainage tube and the inner wall of the liquid outlet pipeline.

Preferably, the support comprises at least three support rods, one end of each support rod is fixed on the side wall of the drainage cylinder, the other end of each support rod is fixed on the inner wall of the liquid outlet pipeline, and the support rods are uniformly distributed along the circumferential direction.

Preferably, the ratio of the diameter of the small-diameter end opening of the drainage tube to the diameter of the large-diameter end opening of the drainage tube is 1 (3-6).

Preferably, the side wall parts for forming the mouth parts at the two ends of the drainage tube are both arc transition structures.

Preferably, the rotor blade is a spiral blade type structure arranged on the inner wall of the rotor cylinder, and a spiral blood flow channel is formed between the side wall of the rotor blade and the inner wall of the rotor cylinder;

the driving device comprises an electromagnetic driving coil and a controller, a permanent magnet is embedded on the outer surface of the rotor cylinder, and the controller controls the size and the direction of current in the electromagnetic driving coil to generate an alternating magnetic field matched with the permanent magnet so as to drive the rotor cylinder to rotate;

the telescopic inner wall is equipped with rotor mounting groove and is located rotor mounting groove both ends and with the bearing mounting groove of rotor mounting groove intercommunication, the rotor drum is installed in the rotor mounting groove through the ceramic bearing who locates the bearing mounting groove, and the installation back the inner wall of rotor drum is level with telescopic inner wall mutually.

Compared with the prior art, the invention has the following beneficial technical effects:

when the device works, the rotor rotates under the action of the driving device and generates negative pressure, so that a driving force for blood flowing is formed, the blood flows from the liquid inlet pipeline to the liquid outlet pipeline through the sleeve, and the inner walls of the liquid inlet pipeline and the liquid outlet pipeline are provided with the first fiber bragg grating and the second fiber bragg grating, so that the fiber bragg gratings are sensitive to temperature, and the temperature data of the blood at the corresponding position can be transmitted to the demodulator through the corresponding optical fiber, so that the temperature of the blood before and after pumping can be detected in real time.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a left side view of the drainage cartridge of the present invention;

fig. 3 is a right side view of the drainage cartridge of the present invention.

Detailed Description

The above and further features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.

Please refer to fig. 1 to 3: the embodiment provides a blood circulation device for cardiovascular treatment, which comprises a sleeve 1, a rotor arranged in the sleeve 1 and a driving device arranged outside the sleeve 1 and used for driving the rotor to rotate, wherein a liquid inlet 11 and a liquid outlet 12 are respectively arranged at two axial ends of the sleeve 1, the rotor comprises a rotor cylinder 21 coaxially arranged with the sleeve 1 and rotor blades 22 fixed on the inner wall of the rotor cylinder 21, and a hollow blood flow channel 23 is formed in the middle of the rotor; the blood pump of this embodiment can be improved on the basis of the miniature axial flow blood pump disclosed in patent CN 201894758U, so that the two pumps can share part of the structure, such as the structure of the rotor and the structure of the driving device.

The key improvement of the blood circulation device for cardiovascular treatment in this embodiment is that the liquid inlet 11 of the sleeve 1 is detachably connected to the liquid inlet pipeline 3, and the liquid outlet 12 of the sleeve 1 is detachably connected to the liquid outlet pipeline 4; the inner wall of the liquid inlet pipeline 3 is pasted with a first fiber bragg grating 31, the inner wall of the liquid outlet pipeline is pasted with a second fiber bragg grating 41, and the first fiber bragg grating 31 and the second fiber bragg grating 41 are respectively connected to the demodulator 5 after being led out from the liquid inlet pipeline 3 and the liquid outlet pipeline 4 through a first optical fiber 32 and a second optical fiber 42. The first optical fiber 32 and the second optical fiber 42 are led out from the liquid inlet pipeline 3 and the liquid outlet pipeline 4, and meanwhile, the sealing of the leading-out holes is kept. The axial both ends of sleeve 1 homogeneous is equipped with first ring flange 13, the one end of being connected with sleeve 1 on inlet channel 3 and the liquid outlet pipe way 4 also is equipped with the second ring flange 14 of corresponding the being connected with first ring flange 13 to be convenient for be connected between sleeve 1 and inlet channel 3, the liquid outlet pipe way 4. The fiber grating is quartz fiber at normal temperature. When in specific use, the demodulator 5 is connected with a computer provided with special software.

When the device works, the rotor rotates under the action of the driving device and generates negative pressure, so that a driving force for blood flowing is formed, the blood flows from the liquid inlet pipeline 3 to the liquid outlet pipeline 4 through the sleeve 1, and the first fiber bragg grating 31 and the second fiber bragg grating 41 are arranged on the inner walls of the liquid inlet pipeline 3 and the liquid outlet pipeline 4 and are sensitive to temperature, and the temperature data of the blood at the corresponding positions can be transmitted to the demodulator 5 through corresponding optical fibers, so that the temperature of the blood before and after pumping can be detected in real time.

The liquid outlet pipeline 4 is provided with a drainage channel 7, and the drainage channel 7 is gradually narrowed along the blood flow direction and is used for draining peripheral blood flow to middle blood flow; the blood circulation device with the structure is beneficial to forming physiological laminar flow; specifically, the rotor rotates under the action of the driving device and conveys blood from front to back, in the process, peripheral blood flow drives middle blood flow, the flow rate of the peripheral blood flow is greater than that of the middle blood flow, a laminar state opposite to the normal blood flow is presented, due to the fact that the drainage channel 7 is additionally arranged, the drainage channel 7 is gradually narrowed along the blood flow direction, after the blood flows out of the rotor, the peripheral blood flow with the higher flow rate enters the drainage channel 7, flows towards the middle blood flow direction along the drainage channel 7 and finally is collected in the middle blood flow, the pressure of the peripheral blood flow can be converted into the kinetic energy of the middle blood flow, the flow rate of the middle blood flow is greater than that of the peripheral blood flow, the blood flowing out of the drainage channel 7 can recover the normal laminar state, and the possibility of blood component damage and thrombus generation in the subsequent flowing process is effectively reduced.

In this embodiment, the drainage channel 7 is in a truncated cone shape and is coaxially arranged with the liquid outlet pipeline 4; the circular truncated cone shape is the shape formed by cutting a circular cone from a plane parallel to the bottom surface of the circular cone; blood enters from the bottom surface of the circular truncated cone-shaped drainage channel 7 and flows out from the top surface, and the blood is pushed by the pressure of peripheral blood flow and the flow of middle blood flow is accelerated in the process; the drainage channel 7, the liquid outlet pipeline 4, the sleeve 1 and the hollow blood flow channel 23 are coaxially arranged, so that uniform drainage of peripheral blood flow is realized, turbulence is reduced, and blood damage is avoided.

In this embodiment, a truncated cone-shaped drainage tube 8 is coaxially fixed in the liquid outlet pipe 4, two ends (left and right ends in fig. 1) of the drainage tube 8 are open, the interior of the drainage tube 8 is hollow, and the hollow part of the drainage tube 8 forms the drainage channel 7; the drainage channel 7 is formed by the independently arranged drainage cylinder 8, so that the improvement cost is reduced, and the blood pump can be obtained by improving the structure of the existing blood pump; the inner wall and the outer wall of the drainage cylinder 8 are parallel to form a rotary body structure with uniform shape; the ratio of the opening diameter of the small-diameter end (right end) of the drainage tube 8 to the opening diameter of the large-diameter end (left end) thereof can be 1 (3-6), for example; meanwhile, in order to reduce the disturbance and shearing action on blood, the side wall parts for forming the two port parts of the drainage tube 8 are all arc transition structures.

In terms of connection mode, the drainage tube 8 can be directly and fixedly connected (for example, welded) to the inner wall of the sleeve 1 through the side wall of the large-diameter port part, and at this time, the inner wall of the sleeve 1 can be provided with a fixing groove matched with the drainage tube 8; however, the structure also causes a blood stagnation area to be formed between the side wall of the drainage tube 8 and the inner wall of the sleeve 1, and thrombus is easy to generate; therefore, in the present embodiment, preferably, the drainage tube 8 is fixed in the sleeve 1 by a bracket, and a gap is formed between the side wall of the drainage tube 8 and the inner wall of the sleeve 1; the drainage tube 8 can be arranged in the drainage tube 8 in a floating way through the bracket, so that a blood stagnation area is prevented from being formed between the side wall of the drainage tube 8 and the inner wall of the sleeve 1; as shown in fig. 1, the gap is gradually increased, and the size of the gap can be determined according to the needs, but it should be ensured that the flow rate of the central blood flow is greater than that of the peripheral blood flow after the blood passes through the drainage tube 8, that is, only a small gap is provided to drive the blood flow between the side wall of the drainage tube 8 and the inner wall of the sleeve 1.

In this embodiment, the support includes at least three support rods 9, one end of each support rod 9 is fixed to the side wall of the drainage tube 8, the other end of each support rod 9 is fixed to the inner wall of the sleeve 1, and each support rod 9 is uniformly distributed along the circumferential direction; the structure and the quantity of branch 9 should consider that drainage tube 8's firm location and reduction cause vortex and shear to blood, and this embodiment sets up branch 9 into the round bar structure, and three branches 9 constitute triangle location structure and support drainage tube 8 jointly.

In this embodiment, the rotor blade 22 is a spiral blade structure disposed on the inner wall of the rotor cylinder 21, and a spiral blood flow channel is formed between the side wall of the rotor blade 22 and the inner wall of the rotor cylinder 21; when the rotor blades 22 rotate, the peripheral blood flow part of the blood firstly enters the spiral blood flow channel and is accelerated and conveyed in the flow channel, and the middle blood flow part of the blood is conveyed along the hollow blood flow channel 23 under the action of the residual pressure of the rotor blades 22 and the peripheral blood flow; the rotor blades 22 of this configuration facilitate reducing blood damage.

In this embodiment, the driving device includes an electromagnetic driving coil 61 and a controller 62, the permanent magnet 24 is embedded in the outer surface of the rotor cylinder 21, and the controller 62 controls the magnitude and direction of the current in the electromagnetic driving coil 61 to generate an alternating magnetic field matched with the permanent magnet 24 so as to drive the rotor cylinder 21 to rotate; the electromagnetic drive coil 61 and the permanent magnet 24 form a magnetic coupling drive structure, which is the prior art and is not described herein again; the rotation speed and rotation direction of the rotor cylinder 21 can be adjusted as necessary under the control of the controller 62.

In this embodiment, the inner wall of the sleeve 1 is provided with a rotor mounting groove and bearing mounting grooves which are located at two ends of the rotor mounting groove and communicated with the rotor mounting groove, the rotor cylinder 21 is mounted in the rotor mounting groove through a ceramic bearing 25 which is arranged in the bearing mounting groove, and the inner wall of the rotor cylinder 21 is flush with the inner wall of the sleeve 1 after mounting; this configuration is beneficial to avoid blood contact with the ports of the rotor cylinder 21, reducing shear damage to the blood.

The foregoing is merely a preferred embodiment of the invention, which is intended to be illustrative and not limiting. It will be understood by those skilled in the art that various changes, modifications and equivalents may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.