A device for testing the relationship between flow and pressure of a venous valve

Abstract

The application provides a kind of venous valve flow and pressure relationship test equipment, it is related to the technical field of artificial venous valve.The venous valve flow and pressure relationship test equipment provided by the application includes: first test channel for being connected with one end of the pipeline to be measured, second test channel for being connected with the other end of the pipeline to be measured and third test channel connecting first test channel and second test channel, first test channel, second test channel, third test channel form a circulation loop with the pipeline to be measured;Third test channel has: the power of the axial flow pump that can continuously provide fluid unidirectional flow, liquid storage space for containing fluid and valve release mechanism;Valve release mechanism has valve release port that is communicated with the pipeline to be measured through second test channel.

Description

Technical Field

[0001] This specification relates to the technical field of artificial venous valves, and in particular to a device for testing the relationship between venous valve flow and pressure. Background Technology

[0002] Chronic venous disease commonly occurs in the lower extremities and is caused by damage to venous valves, leading to venous reflux and resulting in venous hypertension. The human body has three types of blood vessels: veins, arteries, and capillaries. Only veins have valves; veins are responsible for carrying blood from all parts of the body back to the heart, and valves prevent backflow. Since the 1980s, scientists have proposed creating artificial venous valves to replace diseased venous valves. To test the key performance parameters of artificial venous valves, a device is needed to test the relationship between venous valve flow and pressure. Utility Model Content

[0003] This specification provides a device for testing the relationship between venous valve flow and pressure, comprising: a first test channel for connecting to one end of a tubing to be tested, a second test channel for connecting to the other end of the tubing to be tested, and a third test channel connecting the first test channel and the second test channel, wherein the first test channel, the second test channel, the third test channel, and the tubing to be tested form a circulation loop; the third test channel is equipped with: an axial flow pump capable of continuously providing unidirectional fluid flow power, a fluid storage space for containing fluid, and a valve release mechanism; the valve release mechanism has a valve release port connected to the tubing to be tested via the second test channel.

[0004] In some embodiments, the venous valve flow-pressure relationship testing device includes an image sensor configured to be disposed inside the second test channel via the valve release port for acquiring an image of the interior of the tubing under test.

[0005] In some embodiments, the valve release mechanism includes a sealing member that provides the valve release port, and the valve release mechanism is sealed to the image sensor via the sealing member.

[0006] In some embodiments, the valve release mechanism includes: a housing and a knob threadedly connected to the housing; the housing has an inner hole communicating with the second test channel, and the knob has a knob inner hole connected to the inner hole of the housing; the inner hole of the housing has a stepped portion, the sealing member is disposed on the stepped portion, and the end of the knob abuts against the sealing member.

[0007] In some embodiments, the housing bore, the knob bore, the second test channel, and the test pipeline are on the same axis.

[0008] In some embodiments, the length of the first test channel and the length of the second test channel are both greater than or equal to ten times the inner diameter of the pipeline under test.

[0009] In some embodiments, a first pressure sensor is provided between the first test channel and the pipeline under test, and a second pressure sensor is provided between the second test channel and the pipeline under test.

[0010] In some embodiments, the liquid storage space is provided with a heating device and a temperature sensor.

[0011] In some embodiments, the third test channel is provided with a flow sensor; the third test channel is provided with a throttle valve; and / or, the third test channel is provided with a flow stabilizer.

[0012] In some embodiments, the venous valve flow-pressure relationship testing device further includes: a lower-level computer and a higher-level computer; the lower-level computer is used to acquire pressure information on both sides of the pipeline under test, flow information of the circulation loop, and image information of the valve under test inside the pipeline under test; the higher-level computer is used to record temperature information of the fluid in the reservoir, current signal of the axial flow pump, pressure information, flow information, and image information; the higher-level computer is configured to acquire the opening area of ​​the valve under test based on the image information, and / or the relationship between the opening area of ​​the valve under test and the transvalvular pressure difference under different flow rates. Attached Figure Description

[0013] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. The same numbers in the drawings denote the same structures or steps.

[0014] Figure 1 This is a front view schematic diagram of a device for testing the relationship between venous valve flow and pressure, as shown in some embodiments of this specification.

[0015] Figure 2 This is a top view schematic diagram of a device for testing the relationship between venous valve flow and pressure, as shown in some embodiments of this specification.

[0016] Figure 3 This is a three-dimensional schematic diagram of a device for testing the relationship between venous valve flow and pressure, as shown in some embodiments of this specification.

[0017] Figure 4 This is a top view schematic diagram of the channels and tubing of a venous valve flow-pressure relationship testing device according to some embodiments of this specification.

[0018] Figure 5This is a schematic diagram of the lower-level machine of the venous valve flow and pressure relationship testing device according to some embodiments of this specification.

[0019] Figure 6 This is a schematic diagram of the valve release mechanism of a venous valve flow and pressure relationship testing device according to some embodiments of this specification.

[0020] Figure 7 This is a cross-sectional schematic diagram of the valve release mechanism of a venous valve flow-pressure relationship testing device according to some embodiments of this specification.

[0021] Figure 8 These are schematic diagrams of the tubing and valve under test in some relevant embodiments.

[0022] The diagram shows: 1 First test channel; 2 Second test channel; 3 Third test channel; 31 Flow sensor; 32 Throttling valve; 33 Flow stabilizer; 4 Axial flow pump; 5 Liquid storage space; 51 Heating device; 52 Temperature sensor; 6 Valve release mechanism; 60 Sealing component; 61 Housing; 611 Housing inner hole; 612 Step; 62 Knob; 621 Knob inner hole; 71 First pressure sensor; 72 Second pressure sensor; 81 Lower computer; 82 Upper computer; 9 Three-way component. Detailed Implementation

[0023] To more clearly illustrate the technical solutions of the embodiments in this specification, the embodiments will be described in detail below with reference to the accompanying drawings. Obviously, the content described below are some examples or embodiments of this specification. For those skilled in the art, without creative effort, the technical solutions or means disclosed in this specification can be applied to other scenarios based on this technical content.

[0024] It should be understood that the terms "system," "device," "equipment," "part" and / or "component," "unit" and / or "module" used in this specification are a method of distinguishing different components, elements, parts, sections, or assemblies at different levels. However, if other words can achieve the same purpose, they may be replaced by other expressions.

[0025] Unless otherwise specified, the technical terms used to describe components, elements, etc. in this specification are not singular but may include plural. Generally speaking, terms such as "comprising" or "including" only indicate that explicitly identified steps, elements, or components are included, and these steps, elements, and components do not constitute an exclusive list, as the described method or apparatus may also include other steps or components.

[0026] In the description of this specification, it should be understood that the directional descriptions, such as up, down, front, back, left, and right, indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. These descriptions are for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In the description of this specification, unless otherwise expressly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of the above terms in this specification in conjunction with the specific content of the technical solution.

[0027] It should be noted that the terms "first test channel," "second test channel," and "third test channel" in this specification are for ease of description and simplification only, and do not indicate or imply that the channel must be divided into first, second, and third channels. It is understood that a channel in this specification can consist of a single conduit or a network of connected conduits; the terms "first," "second," and "third" are not intended to limit the specific number of conduits forming the channel.

[0028] Chronic venous disease (CVD) commonly occurs in the lower extremities. It is caused by damage to the venous valves, leading to venous reflux and resulting in venous hypertension. Related data shows that the current prevalence of lower extremity venous disease in my country is 8.89%, which translates to nearly 100 million patients.

[0029] The human body has three types of blood vessels: veins, arteries, and capillaries. Only veins have valves. Veins are responsible for carrying blood from all parts of the body back to the heart, and the valves prevent backflow. In some applications, the valves open as blood flows towards the heart, allowing blood to flow in; once the blood has flowed out, the valves close to prevent backflow. Venous valves are "one-way valves" that ensure the return of blood from veins to the heart. Damage to venous valves can cause venous blood to reflux, leading to venous hypertension and subsequently chronic venous diseases.

[0030] Since the 1980s, scientists have proposed manufacturing artificial venous valves to replace diseased venous valves. To test the key performance parameters of artificial venous valves, a device is needed to test the relationship between venous valve flow and pressure.

[0031] Based on this, one or more embodiments of this specification provide a venous valve flow-pressure relationship testing device (or steady-state flow testing device), which can measure the performance parameters of artificial venous valves under constant flow, such as measuring the transvalvular pressure difference of artificial venous valves under constant flow, or detecting the valve leakage of artificial venous valves under different pressure gradients when closed.

[0032] Figure 1 This is a front view schematic diagram of a device for testing the relationship between venous valve flow and pressure, as shown in some embodiments of this specification. Figure 2 This is a top view schematic diagram of a venous valve flow-pressure relationship testing device according to some embodiments of this specification. Figure 3 This is a three-dimensional schematic diagram of a device for testing the relationship between venous valve flow and pressure, based on some embodiments of this specification. Figure 4 This is a top view schematic diagram of the channels and tubing of a venous valve flow-pressure relationship testing device according to some embodiments of this specification. See also Figures 1 to 4 As shown, in one or more embodiments of this specification, the venous valve flow-pressure relationship testing device may include: a first test channel 1 for connecting to one end of the test tube 100, a second test channel 2 for connecting to the other end of the test tube 100, and a third test channel 3 connecting the first test channel 1 and the second test channel 2, wherein the first test channel 1, the second test channel 2, the third test channel 3 and the test tube 100 form a loop.

[0033] In some embodiments, the test tubing 100 can be a simulated blood vessel. In some embodiments, the Shore hardness of the test tubing 100 can be 5-50A. In some embodiments, the diameter of the test tubing 100 can be 2-15mm. In some embodiments, the interior of the test tubing 100 may include or be provided with a valve. In some embodiments, the valve inside the test tubing 100 can be an artificial venous valve. In some usage scenarios, the interior of the test tubing 100 may not initially include or may not include an artificial venous valve. After the test tubing 100 is connected between the first test channel 1 and the second test channel 2, the artificial venous valve is released into the interior of the test tubing 100 through the first test channel 1 or the second test channel 2.

[0034] In some embodiments, the first test channel 1, the second test channel 2, and the third test channel 3 may be provided by a conduit (e.g., a rigid pipe or a flexible hose) or by the inner wall of a channel inside a solid (e.g., an integrated valve block).

[0035] In some embodiments, the third test channel 3 includes: an axial flow pump 4 capable of continuously providing power for unidirectional fluid flow, a fluid reservoir 5 for containing fluid, and a valve release mechanism 6. The axial flow pump 4 can maintain a constant flow rate of fluid in the circulation loop so that each sensor can measure the performance parameters of the artificial venous valve at a constant flow rate. The fluid reservoir 5 serves as a fluid-containing space, supplying fluid to the circulation loop while simultaneously accommodating fluid returning from the circulation loop. The fluid reservoir 5 can be provided by a reservoir tank or by the space inside a physical entity (e.g., an integrated valve block). The valve release mechanism 6 can be used to release a valve into the test line 100 or to implement the arrangement of one or more sensors that need to be placed in the circulation loop.

[0036] In some embodiments, the valve release mechanism 6 has a valve release port that communicates with the test line 100 via the second test channel 2, so that the artificial venous valve can be released into the test line 100, or the sensor can be allowed to enter the second test channel 2 or the test line 100.

[0037] In one or more embodiments of this specification, the venous valve flow-pressure relationship testing device may include an image sensor configured to be disposed inside the second test channel 2 via a valve release port for acquiring images of the interior of the tubing 100 under test. In some embodiments, the image sensor may be an endoscope.

[0038] In some embodiments, the valve release mechanism 6 includes a sealing member 60, which provides a valve release port, and the valve release mechanism 6 is sealed to the image sensor via the sealing member 60. In some embodiments, the sealing member 60 may be made of silicone or rubber, or a material such as polyurethane.

[0039] In some embodiments, the valve release mechanism 6 includes a housing 61 and a knob 62 threadedly connected to the housing 61. See also: Figure 6 , Figure 7 As shown, the housing 61 has an inner hole 611 communicating with the second test channel 2, and the knob 62 has a knob inner hole 621 connected to the inner hole 611. In some embodiments, the inner hole 611 has a stepped portion 612, a sealing member 60 is provided on the stepped portion 612, and the end of the knob 62 abuts against the sealing member 60.

[0040] In some embodiments, the housing 61 is threadedly connected to the knob 62. For example, the housing 61 has an internal thread, and the knob 62 has an external thread that matches the internal thread. In some embodiments, a receiving space for accommodating the sealing member 60 is formed between the housing 61 and the knob 62. When the knob 62 is screwed into the housing 61, the volume of the receiving space for accommodating the sealing member 60 decreases, the sealing member 60 is compressed, and the material of the sealing member 60 is squeezed toward the valve release port of the sealing member 60 to reduce the area of ​​the valve release port of the sealing member 60, so that the inner wall of the valve release port of the sealing member 60 fits against the outer wall of the member located at the valve release port, thereby achieving a seal.

[0041] In some applications, loosening knob 62 increases the area of ​​the valve release port of sealing member 60, allowing the artificial venous valve to sequentially pass through the inner hole 621 of the knob, the valve release port of sealing member 60, the inner hole 611 of the housing, and the second test channel 2 into the test tube 100. In other applications, a portion of an image sensor (e.g., an endoscope) sequentially passes through the inner hole 621 of the knob, the valve release port of sealing member 60, and the inner hole 611 of the housing into the second test channel 2, facing the test tube 100 to acquire an image of the artificial venous valve inside the test tube 100. Tightening knob 62 reduces the area of ​​the valve release port of sealing member 60, causing the inner wall of the valve release port to fit against the outer wall of the image sensor, thus achieving a seal.

[0042] In some embodiments, the venous valve flow-pressure relationship testing device may include a three-way connector 9 for connecting the valve release mechanism 6 to the circulation loop. In some embodiments, the three-way connector 9 may be arranged on the second test channel 2. In other embodiments, the three-way connector 9 may be arranged on the third test channel 3. In still other embodiments, see [link to documentation]. Figures 1 to 3 As shown, the first port of the tee component 9 is connected to the second test channel 2, the second port of the tee component 9 is connected to the third test channel 3, and the third port of the tee component 9 is connected to the housing 61 and communicates with the inner hole 611 of the housing.

[0043] In some embodiments, the housing inner hole 611, the knob inner hole 621, the second test channel 2, and the test tube 100 are on the same axis to facilitate the insertion of an artificial venous valve or an image sensor. In some embodiments, the first test channel 1, the second test channel 2, and the test tube 100 are on the same axis.

[0044] In one or more embodiments of this specification, the length L1 of the first test channel 1 and the length L2 of the second test channel 2 are both greater than or equal to ten times the inner diameter D of the pipeline 100 under test, so as to ensure that the fluid in the pipeline 100 under test is sufficiently stable.

[0045] In one or more embodiments of this specification, a first pressure sensor 71 is provided between the first test channel 1 and the test pipeline 100, and a second pressure sensor 72 is provided between the second test channel 2 and the test pipeline 100. The first pressure sensor 71 and the second pressure sensor 72 are used to measure the pressure before and after the artificial venous valve. For example, a first tee member is provided between the first test channel 1 and the test pipeline 100, and the first pressure sensor 71 is connected to the first tee member; a second tee member is provided between the second test channel 2 and the test pipeline 100, and the second pressure sensor 72 is connected to the second tee member. A branch is formed at the circulation loop through the first tee member and the second tee member, allowing the first pressure sensor 71 and the second pressure sensor 72 to be arranged at the branch to measure the static pressure at both ends of the test pipeline 100, avoiding the influence of dynamic pressure on the measurement data.

[0046] In one or more embodiments of this specification, a heating device 51 and a temperature sensor 52 are provided in the liquid storage space 5. The heating device 51 is used to heat the fluid in the liquid storage space 5 and / or the fluid in the circulation loop. The temperature sensor 52 is used to obtain the temperature of the fluid in the liquid storage space 5 and / or the fluid in the circulation loop, so as to control the opening and closing of the heating device 51.

[0047] In some embodiments, a flow sensor 31 is provided on the third test channel 3 to acquire flow rate data of the fluid in the circulation loop. The rotational speed of the axial flow pump 4 is adjusted based on the flow rate data acquired by the flow sensor 31 to adjust the flow rate of the fluid in the circulation loop. In some embodiments, a throttle valve 32 is provided on the third test channel 3. The opening degree of the throttle valve 32 is adjusted based on the flow rate data acquired by the flow sensor 31 to adjust the flow rate of the fluid in the circulation loop. In some embodiments, the flow sensor 31 can be a turbine flow meter. In some embodiments, a flow stabilizer 33 is also provided on the third test channel 3 to stabilize the liquid flow rate and ensure that the flow rate remains constant when the pressure or load changes.

[0048] In one or more embodiments of this specification, the venous valve flow-pressure relationship testing device further includes a lower-level computer 81 and a higher-level computer 82. The lower-level computer 81 is used to collect data, and the higher-level computer 82 is used to process the data, such as through image processing.

[0049] In some embodiments, the lower-level computer 81 is used to acquire pressure information on both sides of the pipeline under test 100, flow information of the circulation loop, and image information of the valve under test inside the pipeline under test. In some embodiments, the lower-level computer 81 can control the flow rate output by the axial flow pump 4 by adjusting the current. In some embodiments, the lower-level computer 81 can also heat the fluid and keep the fluid at a constant temperature by using the heating device 51 and the temperature sensor 52.

[0050] In some embodiments, the lower-level machine 81 may include one or more indicator lights. These indicator lights can be used to indicate the operating status of various signal interfaces, such as the operating status of the axial flow pump 4, the operating status of the flow regulator 33, the operating status of the heating device 51 and / or the temperature sensor 52, the operating status of the first pressure sensor 71 and the second pressure sensor 72, the operating status of the flow sensor 31, and the operating status of the throttle valve 32 (e.g., an electrically controlled throttle valve). In some embodiments, the operating status may include on / off, stable operation, etc.

[0051] In some embodiments, the host computer 82 is used to record the temperature information of the fluid in the reservoir 5, the current signal of the axial flow pump 4, pressure information, flow rate information, and image information. In some embodiments, the host computer 82 is configured to obtain the orifice area of ​​the valve under test based on the image information, and / or the relationship between the orifice area of ​​the valve under test and the transvalvular pressure difference at different flow rates. For example, it can obtain a graph showing the relationship between the orifice area of ​​the valve under test and the transvalvular pressure difference at different flow rates, in order to evaluate the hemodynamic characteristics of the artificial venous valve and provide direction for the design of the artificial venous valve.

[0052] Figure 8 These are schematic diagrams of the test tubing and the test valve in some related embodiments. The test tubing can be the aforementioned test tubing 100, and the test valve can be an artificial venous valve placed in the test tubing 100. As a substitute for venous valves, the artificial venous valve also has the function of a one-way valve, that is, it has a one-way flow direction that allows fluids (such as blood) to pass through.

[0053] In some use cases, see Figure 8 a, Figure 8 As shown in b, an artificial venous valve is placed in the tubing to be tested, with a unidirectional flow direction from left to right, meaning it allows fluid to pass from left to right and prevents fluid from passing from right to left. Figure 8 The arrow in b indicates that the fluid flow direction is from left to right. In this usage scenario, the artificial venous valve is configured so that its unidirectional flow direction is consistent with the unidirectional flow direction of the fluid supplied by the axial flow pump 4, thereby ensuring that the artificial venous valve is always open during fluid movement, allowing the user to test the performance parameters of the artificial venous valve at a specific flow rate (especially a constant flow rate). In this usage scenario, the performance parameters of the artificial venous valve at a constant flow rate may include the transvalvular pressure differential of the artificial venous valve at a constant flow rate, i.e. Figure 8 The pressure difference between the two sides of the artificial venous valve in b under constant flow conditions, specifically the pressures P1 and P2.

[0054] In other use cases, see Figure 8As shown in Figure c, the artificial venous valve is placed in the tubing to be tested, with a unidirectional flow direction from right to left, meaning it allows fluid to pass from right to left and blocks fluid to pass from left to right. Figure 8 The arrow in 'c' indicates that the fluid flow direction is from left to right. In this application scenario, the artificial venous valve is configured to have a unidirectional flow direction opposite to that of the fluid supplied by the axial flow pump 4, so that the artificial venous valve is always in a closed state during fluid movement, allowing the user to test its check valve performance.

[0055] In some further applications, when the artificial venous valve is configured such that its unidirectional flow direction is opposite to the unidirectional flow direction of the fluid supplied by the axial flow pump 4, the pressure difference across the artificial venous valve, i.e. the pressure difference between pressure P3 and pressure P4 across the artificial venous valve, is adjusted by adjusting the rotational speed of the axial flow pump 4, in order to test the leakage of the artificial venous valve under different pressure gradients.

[0056] The beneficial effects that the embodiments of this specification may bring include, but are not limited to: (1) providing fluid to the circulation loop at a constant flow rate through an axial flow pump to determine the performance parameters of the artificial venous valve located in the pipeline under test at a constant flow rate; (2) determining the leakage of the artificial venous valve under different pressure gradients when it is closed by reversing the release of the artificial venous valve to the pipeline under test; (3) releasing the artificial venous valve in the pipeline under test through a valve release mechanism, and allowing the artificial venous valve to have different release directions; (4) further arranging an image sensor through the valve release mechanism to monitor the opening area of ​​the artificial venous valve at a constant flow rate; (5) sealing between the image sensor and the circulation loop after arranging the image sensor through the valve release mechanism; (6) the inner hole of the housing, the inner hole of the knob, and the second test channel in the valve release mechanism are in the same straight line, which facilitates the release of the artificial venous valve and the assembly of the image sensor; (7) adjusting the flow rate in the circulation loop through the cooperation of the throttle valve and the axial flow pump. It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects may be any one or a combination of the above, or any other possible beneficial effects.

[0057] The basic concepts have been described above. It is obvious that the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, various modifications, improvements, and corrections may be made to this specification by those skilled in the art. Such modifications, improvements, and corrections are taught in this specification and therefore remain within the spirit and scope of the exemplary embodiments described herein.

Claims

1. A device for testing the relationship between venous valve flow and pressure, characterized in that, include: A first test channel (1) for connecting to one end of the pipeline under test (100), a second test channel (2) for connecting to the other end of the pipeline under test (100), and a third test channel (3) connecting the first test channel (1) and the second test channel (2), wherein the first test channel (1), the second test channel (2), and the third test channel (3) form a loop with the pipeline under test (100); The third test channel (3) is equipped with: an axial flow pump (4) that can continuously provide the power for unidirectional fluid flow, a liquid storage space (5) for containing fluid, and a valve release mechanism (6). The valve release mechanism (6) has a valve release port that is connected to the pipeline to be tested (100) via the second test channel (2).

2. The venous valve flow-pressure relationship testing device according to claim 1, characterized in that, include: An image sensor is configured to be disposed inside the second test channel (2) via the valve release port for acquiring an image of the inside of the pipeline under test (100).

3. The venous valve flow-pressure relationship testing device according to claim 2, characterized in that, The valve release mechanism (6) includes a sealing member (60) that provides the valve release port, and the valve release mechanism (6) is sealed to the image sensor by the sealing member (60).

4. The venous valve flow-pressure relationship testing device according to claim 3, characterized in that, The valve release mechanism (6) includes: a housing (61) and a knob (62) threadedly connected to the housing (61). The housing (61) has a housing inner hole (611) that communicates with the second test channel (2), and the knob (62) has a knob inner hole (621) that is connected to the housing inner hole (611). The inner hole (611) of the housing has a stepped portion (612), the sealing member (60) is disposed on the stepped portion (612), and the end of the knob (62) abuts against the sealing member (60).

5. The venous valve flow-pressure relationship testing device according to claim 4, characterized in that, The inner hole of the housing (611), the inner hole of the knob (621), the second test channel (2), and the pipeline to be tested (100) are on the same axis.

6. The venous valve flow-pressure relationship testing device according to claim 1, characterized in that, The length of the first test channel (1) and the length of the second test channel (2) are both greater than or equal to ten times the inner diameter of the pipeline under test (100).

7. The venous valve flow-pressure relationship testing device according to claim 1, characterized in that, A first pressure sensor (71) is provided between the first test channel (1) and the pipeline under test (100), and a second pressure sensor (72) is provided between the second test channel (2) and the pipeline under test (100).

8. The venous valve flow-pressure relationship testing device according to claim 1, characterized in that, The liquid storage space (5) is equipped with a heating device (51) and a temperature sensor (52).

9. The venous valve flow-pressure relationship testing device according to claim 1, characterized in that, A flow sensor (31) is provided on the third test channel (3); The third test channel (3) is equipped with a throttle valve (32); And / or, a current stabilizer (33) is provided on the third test channel (3).

10. The venous valve flow-pressure relationship testing device according to claim 1, characterized in that, Also includes: Lower-level machine (81) and upper-level machine (82); The lower-level machine (81) is used to acquire pressure information on both sides of the pipeline under test (100), flow information of the circulation loop, and image information of the valve under test inside the pipeline under test. The host computer (82) is used to record the temperature information of the fluid in the liquid storage space (5), the current signal of the axial flow pump (4), the pressure information, the flow rate information and the image information; the host computer (82) is configured to obtain the opening area of ​​the valve under test based on the image information, and / or the relationship between the opening area of ​​the valve under test and the transvalvular pressure difference under different flow rates.

Images