CN210014975U - Artificial heart valve bursting pressure testing device - Google Patents
Artificial heart valve bursting pressure testing device Download PDFInfo
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- CN210014975U CN210014975U CN201920686296.5U CN201920686296U CN210014975U CN 210014975 U CN210014975 U CN 210014975U CN 201920686296 U CN201920686296 U CN 201920686296U CN 210014975 U CN210014975 U CN 210014975U
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Abstract
The utility model provides a prosthetic heart valve burst pressure testing arrangement, is including supplying pressure unit, monitoring unit, be provided with one in the monitoring unit and be used for the clamping mechanism of prosthetic heart valve reverse fixation, supply to press including an air feed mechanism and a confession liquid mechanism in the unit, supply liquid mechanism to construct the intercommunication through the clamping mechanism in catheter and the monitoring unit, air feed mechanism and confession liquid mechanism pass through the air duct intercommunication to realize that atmospheric pressure converts the reverse end department of prosthetic heart valve into hydraulic pressure and acts on in the clamping mechanism, monitoring unit is located one side department intercommunication of clamping mechanism and is had a pressure monitor that is used for monitoring the backpressure that prosthetic heart valve bore. The utility model has the advantages of quick clamping valve, safe testing process and simple structure, and can meet the requirement of the current test.
Description
Technical Field
The utility model relates to a prosthetic heart valve technical field, concretely relates to prosthetic heart valve burst pressure testing arrangement.
Background
Currently, for patients with severe valvular heart disease, surgical replacement of prosthetic valves is the only effective treatment in the end. The artificial heart valve (heart valve) is an artificial organ which can be implanted in the heart to replace the heart valve (aortic valve, tricuspid valve and mitral valve), and can make blood flow in one direction, namely, flow in the forward direction and close in the reverse direction.
Prosthetic valves are divided into two broad categories depending on the material used: one type is a mechanical valve made entirely of artificial material and the other type is a biological valve made entirely or partially of biological tissue. Since 1965, the biological valve is implanted into human body for the first time, because the biological valve has better biocompatibility and central flow passage than a mechanical valve, the biological valve is widely applied in clinic, and through more than forty years of development, the biological valve reaches acceptable degrees in fluid mechanical property, compatibility with the body and durability of valve function. However, the biological tissue has a certain strength, and when the reverse pressure is greater than a certain value, the reverse closing effect of the valve is lost. The maximum reverse pressure to failure of the valve is generally defined as the reverse burst pressure of the valve.
The in vitro test is an important content of performance evaluation of the artificial heart valve, aims to obtain performance parameters of the valve, evaluates the quality of the valve and provides a basis for performance optimization of the valve. The burst pressure test of the artificial heart valve is a more critical test item. In view of the above, there is a need to provide a burst pressure testing device with simple structure and safe and convenient testing process to meet the current testing requirements.
Disclosure of Invention
In view of this, the utility model aims at providing a prosthetic heart valve burst pressure testing arrangement, this testing arrangement has quick clamping valve, test procedure safety, simple structure's advantage, can satisfy present test needs.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
the utility model provides a prosthetic heart valve burst pressure testing arrangement, is including supplying pressure unit, monitoring unit, be provided with one in the monitoring unit and be used for the clamping mechanism with the reverse fixed of prosthetic heart valve, supply to press including an air feed mechanism and one in the unit to supply liquid mechanism, supply liquid mechanism to construct the intercommunication through the clamping mechanism in catheter and the monitoring unit, air feed mechanism passes through the air duct intercommunication with supplying liquid mechanism to realize that atmospheric pressure converts hydraulic pressure into and acts on the reverse end department of prosthetic heart valve in the clamping mechanism, monitoring unit is located one side department intercommunication that clamping mechanism has a pressure monitor that is used for monitoring the reverse pressure that prosthetic heart valve bore.
Preferably, the gas supply mechanism comprises a high-pressure gas cylinder, the liquid supply mechanism comprises a liquid storage tank, detection liquid is contained in the liquid storage tank, an air inlet and a liquid outlet are formed in the top of the liquid storage tank, an air outlet of the high-pressure gas cylinder is communicated with the air inlet of the liquid storage tank through an air guide pipe, one end of a liquid guide pipe is communicated with the liquid outlet of the liquid storage tank and extends into the liquid level of the detection liquid, and gas in the high-pressure gas cylinder is introduced into the liquid storage tank and the detection liquid in the liquid storage tank is introduced into the monitoring unit through the liquid guide pipe.
Preferably, the air duct is provided with a pressure regulating valve.
Preferably, the clamping mechanism comprises an upper clamp, a lower clamp and a soft clamp, the upper clamp is a convex cover body structure with an internal cavity, the bottom of the upper clamp is in interference fit connection with the end part of the lower clamp, the soft clamp is embedded in the joint, a liquid inlet is formed in the top of the upper clamp and communicated with the liquid guide pipe, a water drainage port is formed in the bottom of the lower clamp, and a burst pressure testing cavity is formed between the internal cavity of the upper clamp and the soft clamp.
Preferably, the soft clamp is internally provided with a heart valve prosthesis arranged in an opposite direction, the opposite end of the heart valve prosthesis extends into the burst pressure testing cavity, and the forward end of the heart valve prosthesis corresponds to the position of the water outlet of the lower clamp.
Preferably, the monitoring unit further comprises a water drainage tank, a water inlet is formed in the top of the water drainage tank and is communicated with the water drainage port of the lower fixture, a water drainage port is formed in one side of the bottom of the water drainage tank, and a water drainage tank valve is arranged at the water drainage port.
Preferably, a pressure sensor for detecting the pressure condition of the reverse end of the artificial heart valve is arranged at one side of the bursting pressure testing cavity, and the pressure sensor is connected with the pressure monitor.
Compared with the prior art, the utility model provides a pair of artificial heart valve burst pressure testing arrangement, this testing arrangement can automatic recording pressure curve, judges reverse burst pressure from curved peak value, does not have the test solution to leak outward in the whole test procedure simultaneously, guarantees test safety, and the clamping mechanism of adoption also can carry out quick replacement according to the different specifications of test sample, and the test procedure is simple, convenient operation, and data are accurate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a device for testing burst pressure of a prosthetic heart valve provided by the present invention.
Reference numerals and component parts description referred to in the drawings:
1. a catheter; 2. an air duct; 3. a prosthetic heart valve; 4. a pressure monitor; 5. a high pressure gas cylinder; 6. a liquid storage tank; 7. a pressure regulating valve; 8. an upper clamp; 9. a lower clamp; 10. a soft clamp; 11. a burst pressure test chamber; 12. a water drainage tank; 13. a drain tank valve; 14. a pressure sensor.
Detailed Description
The in vitro test is an important content of performance evaluation of the artificial heart valve, aims to obtain performance parameters of the valve, evaluates the quality of the valve and provides a basis for performance optimization of the valve. The burst pressure test of the artificial heart valve is a more critical test item. To this end, the utility model provides a simple structure, safe convenient burst pressure testing arrangement of testing process to satisfy present test needs.
The technical solution of the present invention will be described clearly and completely through the following detailed description. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, a device for testing the burst pressure of a prosthetic heart valve includes a pressure supply unit and a monitoring unit. The monitoring unit is internally provided with a clamping mechanism for reversely fixing the artificial heart valve, the pressure supply unit is internally provided with an air supply mechanism and a liquid supply mechanism, the liquid supply mechanism is communicated with the clamping mechanism in the monitoring unit through a liquid guide pipe 1, and the air supply mechanism is communicated with the liquid supply mechanism through an air guide pipe 2, so that air pressure is converted into hydraulic pressure and acts on the reverse end of the artificial heart valve 3 in the clamping mechanism. The monitoring unit is communicated with a pressure monitor 4 for monitoring the reverse pressure born by the artificial heart valve 3 at one side of the clamping mechanism.
Specifically, the gas supply mechanism comprises a high-pressure gas cylinder 5, the liquid supply mechanism comprises a liquid storage tank 6, detection liquid is contained in the liquid storage tank 6, a gas inlet and a liquid outlet are formed in the top of the liquid storage tank 6, and the gas outlet of the high-pressure gas cylinder 5 is communicated with the gas inlet of the liquid storage tank 6 through a gas guide pipe 2. The gas guide tube 2 is provided with a pressure regulating valve 7 for regulating the gas outlet pressure of the high-pressure gas bottle 5. One end of the liquid guide pipe 1 is communicated with the liquid outlet of the liquid storage tank 6 and extends to the position below the liquid level of the detection liquid, and the high-pressure gas in the high-pressure gas bottle 5 is introduced into the liquid storage tank 6 and the detection liquid in the liquid storage tank 6 is introduced into the monitoring unit through the liquid guide pipe 1.
The clamping mechanism comprises an upper clamp 8, a lower clamp 9 and a soft clamp 10. The upper clamp 8 is a convex cover body structure with an internal cavity, the bottom of the upper clamp 8 is in interference connection with the end part of the lower clamp 9, and a soft clamp 10 is embedded in the connection part. The top of the upper clamp 8 is provided with a liquid inlet and communicated with the liquid guide pipe 1, the bottom of the lower clamp 9 is provided with a water drainage port, and a burst pressure testing cavity 11 is formed between the inner cavity of the upper clamp 8 and the soft clamp 10.
The soft clamp 10 is internally clamped with the artificial heart valve 3 which is arranged in the reverse direction, and the middle of the soft clamp 10 is provided with a hole which is smaller than the outer diameter of the artificial heart valve 3, so that the artificial heart valve 3 can be arranged and clamped in the soft clamp 10 in an interference fit manner. The reverse end of the artificial heart valve 3 extends into the burst pressure testing cavity 11, and the forward end corresponds to the position of the water discharge opening of the lower clamp 9. When the liquid pressure in the burst pressure testing cavity 11 gradually increases, the artificial heart valve 3 is pressed from top to bottom, and the artificial heart valve 3 is directly contacted with the lower clamp 9, so that the artificial heart valve 3 is supported sufficiently, and the stability of the artificial heart valve 3 is ensured.
When the test liquid passes through the artificial heart valve 3 in the test process, a small part of the test liquid initially passes through the artificial heart valve 3, and when the pressure of the test liquid in the burst pressure test cavity 11 exceeds the reverse burst pressure of the artificial heart valve 3, the test liquid passes through the artificial heart valve 3 mostly. In order to prevent the test solution from exposing, the monitoring unit further comprises a water drainage tank 12, a water inlet is formed in the top of the water drainage tank 12 and is communicated with a water drainage opening of the lower fixture 9, and the test solution flows into the water drainage tank 12 through the lower fixture 9. A drainage outlet is arranged at one side of the bottom of the drainage tank 12, and a drainage tank valve 13 is arranged at the drainage outlet.
A pressure sensor 14 for detecting the pressure condition of the reverse end of the artificial heart valve 3 is arranged at one side of the burst pressure testing cavity 11, and the pressure sensor 14 is connected with the pressure monitor 4.
The specific test process is as follows:
firstly, the upper clamp 8 and the lower clamp 9 are opened, the soft clamp 10 is fixed at the position of the joint of the upper clamp and the lower clamp, the test sample is clamped in the central hole of the soft clamp 10, and the soft clamp 10 is fixed by using a screw or a bolt, so that the radial stability of the test sample is ensured.
Secondly, the liquid storage tank 6 is filled with the test liquid and sealed. The liquid in the drain tank 12 is drained, and the drain tank valve 13 is closed. And the unit parts are connected through the air duct 2 and the liquid guide pipe 1 according to requirements. In the initial condition, the pressure regulating valve 7 located on the airway tube 1 is completely closed.
When the test is started, a tester slowly opens the pressure regulating valve 7, high-pressure gas in the high-pressure gas bottle 5 is introduced into the liquid storage tank 6, and test liquid in the liquid storage tank 6 is extruded into a burst pressure test cavity 11 formed by the upper clamp 8 and the soft clamp 10 through the liquid guide pipe 1 and acts on the reverse end of the artificial heart valve 3 positioned in the burst pressure test cavity 11. Since the prosthetic heart valve 3 is in the reverse closed state, most of the test fluid will be blocked in the burst pressure test chamber 11, and only a small portion of the test fluid will flow into the drain tank 12. With the gradual opening of the pressure regulating valve 7, the test liquid pressure in the burst pressure test chamber 11 will gradually increase, and the specific pressure value can be captured by the pressure sensor 14 and displayed and recorded by the pressure monitor 4.
When the pressure of the test liquid in the burst pressure test cavity 11 is increased to a certain value, the valve leaf reverse closing function of the artificial heart valve 3 fails, and the test liquid breaks the artificial heart valve 3 and rapidly flows into the drain tank 12. In the process, the liquid pressure in the burst pressure test cavity 11 is rapidly reduced, and the highest peak of the curve recorded in the pressure monitor 4 is the reverse burst pressure of the artificial heart valve 3.
After the test is finished, the pressure regulating valve 7 is closed, the upper clamp 8 and the lower clamp 9 are opened, the artificial heart valve 3 is taken out from the soft clamp 10, and the whole test process is finished.
The utility model discloses can automatic recording pressure curve, judge reverse burst pressure from curved peak value, do not have test liquid to leak outward in the whole testing process simultaneously, guarantee test safety, the clamping machine of adoption constructs and also can carry out quick replacement according to the different specifications of test sample, and the testing process is simple, convenient operation, and data are accurate.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The utility model provides a prosthetic heart valve burst pressure testing arrangement which characterized in that: including supplying pressure unit, monitoring unit, be provided with a clamping mechanism that is used for the heart valve prosthesis reverse fixation in the monitoring unit, supply including an air feed mechanism and a confession liquid mechanism in the pressure unit, supply liquid mechanism to pass through the clamping mechanism intercommunication in catheter and the monitoring unit, air feed mechanism and confession liquid mechanism pass through the air duct intercommunication to realize that atmospheric pressure converts hydraulic pressure into and acts on the reverse end department of heart valve prosthesis in the clamping mechanism, one side department intercommunication that the monitoring unit is lieing in the clamping mechanism has a pressure monitor who is used for monitoring the reverse pressure that the heart valve prosthesis bore.
2. The device for testing burst pressure of a prosthetic heart valve according to claim 1, wherein: the gas supply mechanism comprises a high-pressure gas cylinder, the liquid supply mechanism comprises a liquid storage tank, detection liquid is contained in the liquid storage tank, an air inlet and a liquid outlet are formed in the top of the liquid storage tank, the air outlet of the high-pressure gas cylinder is communicated with the air inlet of the liquid storage tank through an air guide pipe, one end of a catheter is communicated with the liquid outlet of the liquid storage tank and stretches into the liquid level of the detection liquid, and gas in the high-pressure gas cylinder is introduced into the liquid storage tank and the detection liquid in the liquid storage tank is introduced into the monitoring unit through the catheter.
3. The device for testing burst pressure of a prosthetic heart valve according to claim 2, wherein: the air duct is provided with a pressure regulating valve.
4. The device for testing burst pressure of a prosthetic heart valve according to claim 1, wherein: the clamping mechanism comprises an upper clamp, a lower clamp and a soft clamp, the upper clamp is of a convex cover body structure with an internal cavity, the bottom of the upper clamp is in interference fit connection with the end portion of the lower clamp, the soft clamp is embedded in the joint, a liquid inlet is formed in the top of the upper clamp and communicated with a liquid guide pipe, a water drainage port is formed in the bottom of the lower clamp, and a burst pressure testing cavity is formed between the internal cavity of the upper clamp and the soft clamp.
5. The device for testing burst pressure of prosthetic heart valve according to claim 4, wherein: the soft clamp is internally provided with a prosthetic heart valve which is arranged in a reverse direction, the reverse end of the prosthetic heart valve extends into the burst pressure testing cavity, and the forward end corresponds to the position of the water outlet of the lower clamp.
6. The device for testing burst pressure of prosthetic heart valve according to claim 4, wherein: the monitoring unit further comprises a water drainage tank, the top of the water drainage tank is provided with a water inlet and communicated with the water drainage port of the lower fixture, one side of the bottom of the water drainage tank is provided with a water drainage port, and the water drainage port is provided with a water drainage tank valve.
7. The device for testing burst pressure of a prosthetic heart valve according to claim 5, wherein: and a pressure sensor for detecting the pressure condition of the reverse end of the artificial heart valve is arranged at one side of the bursting pressure testing cavity and is connected with the pressure monitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920686296.5U CN210014975U (en) | 2019-05-14 | 2019-05-14 | Artificial heart valve bursting pressure testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920686296.5U CN210014975U (en) | 2019-05-14 | 2019-05-14 | Artificial heart valve bursting pressure testing device |
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| Publication Number | Publication Date |
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| CN210014975U true CN210014975U (en) | 2020-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920686296.5U Active CN210014975U (en) | 2019-05-14 | 2019-05-14 | Artificial heart valve bursting pressure testing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11109973B2 (en) | 2020-01-15 | 2021-09-07 | Biomedical Device Consultants and Laboratories of Colorado, LLC | System for evaluation of prosthetic heart valves under steady hydrodynamic conditions |
| CN117232814A (en) * | 2023-11-14 | 2023-12-15 | 安徽农业大学 | Device for testing bursting pressure of artificial heart valve |
-
2019
- 2019-05-14 CN CN201920686296.5U patent/CN210014975U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11109973B2 (en) | 2020-01-15 | 2021-09-07 | Biomedical Device Consultants and Laboratories of Colorado, LLC | System for evaluation of prosthetic heart valves under steady hydrodynamic conditions |
| CN117232814A (en) * | 2023-11-14 | 2023-12-15 | 安徽农业大学 | Device for testing bursting pressure of artificial heart valve |
| CN117232814B (en) * | 2023-11-14 | 2024-01-30 | 安徽农业大学 | Device for testing bursting pressure of artificial heart valve |
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