CN216206599U - Blood pump lift flow characteristic testing device - Google Patents
Blood pump lift flow characteristic testing device Download PDFInfo
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- CN216206599U CN216206599U CN202122515431.XU CN202122515431U CN216206599U CN 216206599 U CN216206599 U CN 216206599U CN 202122515431 U CN202122515431 U CN 202122515431U CN 216206599 U CN216206599 U CN 216206599U
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Abstract
The utility model belongs to the technical field of medical instruments, and particularly discloses a blood pump lift flow characteristic testing device which comprises a first pressure sensor, a flowmeter, a flow regulating valve and a water receiving tank, wherein the first pressure sensor, the flowmeter, the flow regulating valve and the water receiving tank are sequentially connected with an outlet of a blood pump; the second pressure sensor and the liquid storage tank are sequentially connected with the inlet of the blood pump, a water injection pipe is connected onto the liquid storage tank, and a heating element is arranged in the liquid storage tank; and a controller electrically connected to the blood pump assembly for controlling the blood pump. This scheme utilizes equipment such as pressure sensor, flowmeter to form the test that the return circuit realized blood pump lift and flow, and device simple structure, convenient operation is with low costs, and the practicality is strong.
Description
Technical Field
The utility model belongs to the technical field of medical instruments, and particularly relates to a device for testing lift flow characteristics of a blood pump.
Background
Blood pumps, i.e. artificial heart blood pumps, are variable-speed, variable-volume miniature pumps used to completely replace the heart in operation. The artificial heart, as an auxiliary and replacement device for the blood pumping function of the heart, especially an implantable ventricular assist pump, needs to assist the circulation in vivo for a long time, maintain the normal blood pressure of the body and effectively perfuse the brain tissues and other important organs, and has extremely high requirements on the effectiveness, safety and stability.
Wherein, blood pump's differential pressure flow characteristic is different, and the patient object that is suitable for is also different, so differential pressure flow characteristic is very important, usually need test its lift flow characteristic before the product is qualified for the next round of competitions, at present still uses traditional simple equipment, and the device operation is unstable, and the performance is unreliable, and the operation is complicated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a blood pump lift flow characteristic testing device which is simple in structure, convenient to operate, low in cost and high in practicability.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
the blood pump head flow characteristic testing device comprises a first pressure sensor, a flowmeter, a flow regulating valve and a water receiving tank which are sequentially connected with an outlet of a blood pump; the second pressure sensor and the liquid storage tank are sequentially connected with the inlet of the blood pump, a water injection pipe is connected onto the liquid storage tank, and a heating element is arranged in the liquid storage tank; and a controller electrically connected to the blood pump assembly for controlling the blood pump.
Based on the scheme, the utility model is used according to the following steps,
(1) pure water is injected into the liquid storage tank through the water injection pipe, so that the whole testing device is ensured to be watertight;
(2) starting a blood pump through a controller, starting liquid circulation for about 5 minutes, then replacing the pure water in the liquid storage tank, circulating for 5 minutes again, cleaning the whole testing device, and then re-injecting new pure water into the liquid storage tank;
(3) adjusting the revolution of the blood pump assembly to the maximum rotation speed through a controller, closing a flow regulating valve (the liquid flow in a pipeline is 0L/min), recording the pressure at an inlet and the pressure at an outlet of the blood pump assembly at the moment through a first pressure sensor and a second pressure sensor, and taking the difference value of the inlet pressure and the outlet pressure as the maximum closed lift;
(4) adjusting the front load of the blood pump assembly to 40mmHg +/-5 mmHg, simulating the blood pressure of a human body, and calculating the difference value (initial pressure difference) between the outlet pressure and the inlet pressure;
(5) the revolution of the blood pump assembly is set to be the maximum revolution speed through the controller, and when the difference value of the outlet pressure and the inlet pressure is consistent with the initial pressure difference, the display value of the flowmeter is recorded, namely the maximum flow rate.
Preferably, a first temperature sensor is arranged in the liquid storage tank. The temperature of the liquid in the liquid storage tank is monitored in real time through the first temperature sensor, the temperature of the liquid is kept at 37 +/-1 ℃, the temperature of the liquid is basically consistent with the temperature of blood of a human body, the difference between a testing environment and the environment in the human body is reduced as much as possible, and the testing accuracy is improved.
Preferably, be connected with the insulating tube between blood pump entry and the reservoir, the insulating tube keeps warm for the liquid that flows into blood pump entry from the reservoir, avoids the liquid to flow the in-process and produces a large amount of heat and run off, guarantees that the liquid temperature who gets into the blood pump maintains in certain extent, promotes the accuracy nature of test.
Preferably, the heat preservation pipe is provided with a second temperature sensor close to the inlet of the blood pump. The second temperature sensor can further ensure the temperature of the fluid entering the blood pump.
Preferably, a connecting pipe is communicated between the liquid storage tank and the water receiving tank, and a circulating pump is arranged on the connecting pipe.
Preferably, be equipped with circulation chamber and heating chamber in the reservoir, be equipped with the baffle between circulation chamber and the heating chamber, the circulation chamber links to each other with the water receiving tank, and the heating chamber links to each other with blood pump inlet, and a plurality of overflow holes have been seted up on baffle upper portion, heating element is located the heating intracavity. Utilize the baffle to separate circulating liquid and heating liquid, be convenient for directly in leading-in blood pump with the heating liquid to compare in the liquid of the whole reservoir of heating, this scheme heating range is littleer, can the energy saving.
Preferably, the heating element is a thermocouple.
Preferably, the second pressure sensor is located 72mm above the blood pump inlet and the first pressure sensor is horizontally located 250mm from the blood pump outlet.
Has the advantages that: this scheme utilizes equipment such as pressure sensor, flowmeter to form the test that the return circuit realized blood pump lift and flow, and device simple structure, convenient operation is with low costs, and the practicality is strong. This scheme still utilizes a plurality of heating, insulation construction to maintain blood pump circulating fluid temperature's stability, and the precision nature of test is promoted to the discrepancy of minimize test environment and human internal environment.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of the present invention.
Reference numerals in the drawings of the specification include: blood pump 1, first pressure sensor 2, flowmeter 3, water receiving tank 4, flow control valve 5, second pressure sensor 6, water injection pipe 7, reservoir 8, heating element 9, baffle 10, first temperature sensor 11, second temperature sensor 12, inlet tube 13, circulating pump 14, outlet pipe 15.
Detailed Description
Various embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Here, it is to be noted that, in the drawings, the same reference numerals are given to constituent parts having substantially the same or similar structures and functions, and repeated description thereof will be omitted. The term "sequentially comprising A, B, C, etc" merely indicates the order of the included elements A, B, C, etc. and does not exclude the possibility of including other elements between a and B and/or between B and C. The description of "first" and its variants is merely for distinguishing the components and does not limit the scope of the utility model, and "first" may be written as "second" and the like without departing from the scope of the utility model.
The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships.
Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to fig. 1 to 2.
The embodiment provides a blood pump lift flow characteristic testing arrangement, including first pressure sensor 2, flowmeter 3, flow control valve 5, water receiving tank 4, second pressure sensor 6, reservoir 8 and controller.
Referring to fig. 1, a water outlet pipe 15 is communicated between the water receiving tank 4 and the outlet of the blood pump 1, and the first pressure sensor 2, the flow meter 3 and the flow regulating valve 5 are sequentially arranged on the water outlet pipe 15 along the direction from the blood pump 1 to the water receiving tank 4; a water inlet pipe 13 is communicated between the liquid storage tank 8 and the inlet of the blood pump 1, the second pressure sensor 6 is arranged on the water inlet pipe 13, a heating element 9 is also arranged in the liquid storage tank 8, and a water injection pipe 7 is externally connected to the liquid storage tank 8; the controller is electrically connected with the blood pump 1, is used for controlling the opening and closing, the power and the like of the blood pump 1, is also electrically connected with elements such as a temperature sensor, a heating element, a pressure sensor, a flowmeter and the like, and is convenient for controlling the opening and closing or observing a detection value and the like.
Wherein, the heating element 9 is a thermocouple, which has the advantages of low cost and convenient operation; the water injection pipe 7 is externally connected with a pure water source, and in other examples, the water source can also be a mixture of water and glycerin simulating human blood.
Based on the scheme, the utility model is used according to the following steps,
(1) pure water is injected into the liquid storage tank 8 through the water injection pipe 7, so that the whole testing device is ensured to be watertight;
(2) starting the blood pump 1 through the controller, starting liquid circulation for about 5 minutes, then replacing the pure water in the liquid storage tank 8, circulating for 5 minutes again, cleaning the whole testing device, then re-injecting new pure water into the liquid storage tank 8, and heating the pure water to 37 +/-1 ℃ through the heating element 9;
(3) the revolution of the blood pump 1 component is adjusted to the maximum rotating speed through the controller, the flow regulating valve 5 is closed (the liquid flow in the pipeline is 0L/min), the pressure at the inlet and the pressure at the outlet of the blood pump 1 component at the moment are recorded through the first pressure sensor 2 and the second pressure sensor 6, and the difference value of the inlet pressure and the outlet pressure is the maximum closed lift;
(4) adjusting the front load of the blood pump 1 assembly to 40mmHg +/-5 mmHg, and calculating the difference value (initial pressure difference) between the outlet pressure and the inlet pressure;
(5) the revolution of the blood pump 1 assembly is set to be the maximum rotation speed through the controller, and when the difference value of the outlet pressure and the inlet pressure is consistent with the initial pressure difference, the display value of the flowmeter 3 is recorded, namely the maximum flow rate.
The testing device is operated according to the method, so that the maximum closed lift and the maximum flow of the blood pump 1 can be measured, and the whole device is simple in structure, convenient to operate, low in cost and high in practicability.
Referring to fig. 2, in some embodiments, a first temperature sensor 11 is further disposed in the reservoir 8, the first temperature sensor 11 is configured to monitor a temperature of the liquid in the reservoir 8 in real time, and the first temperature sensor 11 is matched with the heating element 9 to ensure that the temperature of the liquid in the reservoir 8 is maintained at 37 ℃ ± 1 ℃, and is substantially consistent with a temperature of blood of a human body, so that a difference between a test environment and a blood environment in the human body is reduced as much as possible, and accuracy of the test is improved.
In some embodiments, the inlet tube 13 that is connected between blood pump 1 entry and the reservoir 8 is the insulating tube, and the insulating tube can select to use the tubulation such as rubber and plastic sponge insulation material or the cotton insulation material of glass that present commonly used, and the insulating tube keeps warm for the liquid that flows into blood pump 1 entry from reservoir 8, avoids the liquid flow in-process to produce a large amount of heat and runs off, guarantees that the liquid temperature who gets into blood pump 1 maintains in certain extent, promotes the accuracy nature of test.
Furthermore, a second temperature sensor 12 is arranged at the position, close to the inlet of the blood pump 1, of the heat preservation pipe (lower end), the second temperature sensor 12 is used for detecting the temperature of liquid at the inlet of the blood pump 1, the temperature of the liquid entering the blood pump 1 is further ensured to be basically consistent with the temperature of blood of a human body through the matching of the first temperature sensor 11, the second temperature sensor 12 and the heating element 9, and the accuracy of the device in testing is further ensured.
In some embodiments, a connecting pipe is communicated between the liquid storage tank 8 and the water receiving tank 4, a circulating pump 14 is arranged on the connecting pipe, the components are connected to form a loop, and when the water receiving tank is used, the circulating pump 14 pumps circulating water in the water receiving tank 4 into the liquid storage tank 8 to realize water circulation.
In some embodiments, a partition 10 is provided in the reservoir 8, the partition 10 divides the interior of the reservoir 8 into a circulation chamber and a heating chamber, the heating chamber is located on the left side, the circulation chamber is located on the right side, the heating chamber is connected with the inlet of the blood pump 1 through a water inlet pipe 13, the circulation chamber is connected with the water receiving tank 4 through a connecting pipe, the heating element 9 and the first temperature sensor 11 are both located in the heating chamber, and the water injection pipe 7 is connected with the circulation chamber. A plurality of overflow holes are arranged on the upper part of the clapboard 10, and the liquid in the circulating cavity can overflow to the heating cavity through the overflow holes. The partition plate 10 is used for separating the circulating liquid from the heating liquid, so that the heating liquid can be directly led into the blood pump 1 conveniently, and compared with the method for heating the liquid in the whole liquid storage tank 8, the method has the advantages that the heating range is smaller, and the energy can be saved.
In some embodiments, second pressure sensor 6 is located 72mm above the inlet of blood pump 1 and first pressure sensor 2 is horizontally located 250mm from the outlet of blood pump 1.
The foregoing detailed description of the preferred embodiments of the utility model has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (8)
1. Blood pump lift flow characteristic testing arrangement, its characterized in that: comprises a first pressure sensor (2), a flowmeter (3), a flow regulating valve (5) and a water receiving tank (4) which are sequentially connected with the outlet of a blood pump (1); the second pressure sensor (6) and the liquid storage tank (8) are sequentially connected with the inlet of the blood pump (1), the liquid storage tank (8) is connected with a water injection pipe (7), and a heating element (9) is arranged in the liquid storage tank (8); and the controller is electrically connected with the blood pump (1) component and is used for controlling the blood pump (1).
2. The blood pump head flow characteristic test device according to claim 1, wherein: a first temperature sensor (11) is arranged in the liquid storage tank (8).
3. The blood pump head flow characteristic test device according to claim 1 or 2, characterized in that: an insulating tube is connected between the inlet of the blood pump (1) and the liquid storage tank (8).
4. The blood pump head flow characteristic test device according to claim 3, wherein: and a second temperature sensor (12) is arranged at the position, close to the inlet of the blood pump (1), of the heat preservation pipe.
5. The blood pump head flow characteristic test device according to claim 1, 2, or 4, wherein: a connecting pipe is communicated between the liquid storage tank (8) and the water receiving tank (4), and a circulating pump (14) is arranged on the connecting pipe.
6. The blood pump head flow characteristic test device according to claim 1, 2, or 4, wherein: be equipped with circulation chamber and heating chamber in reservoir (8), be equipped with between circulation chamber and the heating chamber baffle (10), the circulation chamber links to each other with water receiving tank (4), and the heating chamber links to each other with blood pump (1) entry, and a plurality of overflow holes have been seted up on baffle (10) upper portion, heating element (9) are located the heating intracavity.
7. The blood pump head flow characteristic test device according to claim 1, 2, or 4, wherein: the heating element (9) is a thermocouple.
8. The blood pump head flow characteristic test device according to claim 1, 2, or 4, wherein: the second pressure sensor (6) is positioned 72mm above the inlet of the blood pump (1), and the first pressure sensor (2) is horizontally positioned 250mm away from the outlet of the blood pump (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122515431.XU CN216206599U (en) | 2021-10-19 | 2021-10-19 | Blood pump lift flow characteristic testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122515431.XU CN216206599U (en) | 2021-10-19 | 2021-10-19 | Blood pump lift flow characteristic testing device |
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| Publication Number | Publication Date |
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| CN216206599U true CN216206599U (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122515431.XU Active CN216206599U (en) | 2021-10-19 | 2021-10-19 | Blood pump lift flow characteristic testing device |
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| CN (1) | CN216206599U (en) |
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2021
- 2021-10-19 CN CN202122515431.XU patent/CN216206599U/en active Active
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