Balloon dilatation catheter burst test tool and test device

Abstract

This utility model provides a balloon dilation catheter burst testing fixture, including a water bath, a lid, a connecting joint, a first fixing member, and a second fixing member. The connecting joint is fixedly installed at the middle of one end of the water bath. The first fixing member includes a first fixing plate and a first through hole in the middle of the first fixing plate. The second fixing member includes a second fixing plate, a second through hole in the middle of the second fixing plate, and an anti-detachment locking buckle on one side of the second fixing plate. Both the first and second fixing members are installed inside the water bath through a connecting structure and can move along the length of the water bath. The balloon dilation catheter can be immersed in the water bath through the first and second fixing members, while the anti-detachment locking buckle on the second fixing member fixes the end of the balloon dilation catheter to be tested, preventing the catheter from shifting or swinging during high-pressure injection into the balloon. Simultaneously, the lid is closed during testing to prevent liquid or catheter material from splashing in the event of catheter rupture.

Description

Technical Field

[0001] This utility model relates to the field of medical device testing and inspection technology, specifically to a balloon dilation catheter burst testing fixture and testing device. Background Technology

[0002] A balloon dilation catheter includes the catheter body, an inflatable balloon (1.5-4.0 mm in diameter), and a catheter hub, etc. (see appendix). Figure 8 During the procedure, guided by medical imaging, a balloon is advanced through a guidewire to the narrowed area of ​​the vascular lesion. A liquid medium is injected to inflate the balloon, restoring patency of the blood vessel through physical expansion. Balloon dilation catheters must pass the rated burst pressure test in Appendix A of the national standard YY 0285.4-2017 "Intravascular Catheters - Disposable Sterile Catheters - Part 4: Balloon Dilation Catheters" to ensure the safety and reliability of the balloon dilation catheter. The specific method for the rated burst pressure test is as follows: the balloon dilation catheter is connected to an external device and immersed in a water bath. A liquid medium is injected into the balloon through the external device to inflate it until the catheter bursts or is destroyed. The burst pressure, failure mode, and failure location are recorded.

[0003] Currently, existing water baths lack fixtures for securing the balloon dilation catheter. This prevents the catheter from being fully submerged and makes it prone to displacement or movement during high-pressure injection into the balloon, affecting test accuracy. If personnel are required to immerse and secure the catheter in the water bath, the process takes several minutes, is time-consuming and labor-intensive, and inefficient. Furthermore, the open testing environment of existing water baths poses a safety hazard if the catheter ruptures. Therefore, a suitable testing fixture is urgently needed to secure and protect the balloon dilation catheter during rated burst pressure tests to address these issues. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a test fixture capable of performing burst tests on balloon dilation catheters. This fixture can both fix the balloon dilation catheter and immerse it in water during the test, and protect the water bath to prevent liquid or catheter material from splashing during the test.

[0005] This utility model adopts the following technical solution: a balloon dilation catheter burst test fixture, including a water bath, a lid, a connecting joint, a first fixing member and a second fixing member; the lid is hinged to the top of the water bath, the connecting joint is fixedly installed in the middle of one end of the water bath, and the connecting joint can be sealed to the head end of the balloon dilation catheter to be tested; the first fixing member includes a first fixing plate and a first through hole opened in the middle of the first fixing plate, and the second fixing member includes a second fixing plate, a second through hole opened in the middle of the second fixing plate and an anti-detachment buckle provided on one side of the second fixing plate;

[0006] At least one of the first fixing members and one of the second fixing members are installed inside the water bath via a connecting structure, and both are capable of moving along the length of the water bath; the first fixing member is located between the second fixing member and the connecting joint; the first through hole and the second through hole are used for the balloon dilation catheter to be tested to pass through; and the anti-detachment buckle is used to fix the end of the balloon dilation catheter to be tested.

[0007] Furthermore, the connection structure includes a sliding groove, a first slider, and a second slider. The two sliding grooves are formed on opposite sides inside the water bath. The two first sliders are fixedly connected to opposite sides of the first fixed plate. The two first sliders are respectively connected to the two sliding grooves with a gap, and the first sliders can slide along the sliding grooves. The two second sliders are fixedly connected to opposite sides of the second fixed plate. The two second sliders are respectively connected to the two sliding grooves with a gap, and the second sliders can slide along the sliding grooves.

[0008] Furthermore, the anti-detachment buckle includes a clamping cylinder and a locking cap. The clamping cylinder is fixedly connected to one side of the second fixing plate, and its inner cavity is connected to the second through hole. The clamping cylinder includes at least two arc-shaped fixing plates arranged in a circular array with the axis of the second through hole as the center. The fixing plates are elastic plates, and a shrinkage groove is reserved between two adjacent fixing plates. External threads are provided on the outer surface of the fixing plates.

[0009] The lock cap has a columnar or frustum-shaped structure with a conical inner cavity in its middle, and the conical inner cavity extends out of the front and rear end faces of the lock cap. An internal thread that can be threaded to match the external thread is provided on the inner surface of the conical inner cavity.

[0010] Preferably, a flexible pad is fixed on the inner side of the fixing piece.

[0011] Furthermore, the water bath also includes a heating plate disposed at the bottom of the inner side of the water bath and a thermostat disposed on the outer side of the water bath. The heating plate and the thermostat are electrically connected. The thermostat includes a display screen and a temperature adjustment knob. The display screen is used to display the heating constant temperature and the real-time water temperature in the water bath. The temperature adjustment knob is used to adjust the heating constant temperature of the heating plate.

[0012] Furthermore, the lid is hinged to one side of the top of the water bath via a hinge, and a fixing buckle is provided on the other side of the lid and the water bath to fix the lid to the top of the water bath.

[0013] Furthermore, both the water bath tank and the tank cover are made of transparent material, and a drain pipe with a switch is connected to the lower outer side of the water bath tank; a handle is fixedly connected to the top surface of the tank cover.

[0014] Furthermore, both ends of the connecting joint are provided with Luer connectors. One Luer connector is located inside the water bath chamber and is used for a sealed connection with the tip of the balloon dilation catheter to be tested. The other Luer connector is located outside the water bath chamber and is used for a sealed connection with an external liquid supply device. The liquid supply device is used to inject liquid medium into the balloon and monitor the hydraulic pressure.

[0015] Furthermore, a balloon dilatation catheter burst testing device includes a liquid supply device and a balloon dilatation catheter burst testing fixture; the liquid supply device includes a miniature water pump and an electronic pressure gauge, the outlet pipe of the miniature water pump is sealed to the outer end of a connecting joint via a connecting pipe, the head end of the balloon dilatation catheter to be tested is sealed to the inner end of the connecting joint, and the balloon dilatation catheter to be tested passes through a first through hole and a second through hole, and the end of the balloon dilatation catheter to be tested is fixed to an anti-detachment locking buckle; the miniature water pump is used to pump liquid into the balloon of the balloon dilatation catheter to be tested; the electronic pressure gauge is installed on the outlet pipe of the miniature water pump for monitoring hydraulic pressure.

[0016] Beneficial effects: The balloon dilatation catheter burst testing fixture in this patent allows the balloon dilatation catheter to be immersed in a water bath during rated burst pressure testing. The first and second fixing components secure the catheter in place, while the anti-detachment locking buckle on the second fixing component prevents displacement or movement during high-pressure injection into the balloon. Furthermore, the first and second fixing components are adjustable along the length of the water bath, making it suitable for testing balloon dilatation catheters of different lengths. The heating plate and temperature controller on the water bath facilitate temperature control (37±2℃), ensuring the required testing temperature. Additionally, closing the lid during testing prevents liquid or catheter material from splashing in the event of catheter rupture. Attached Figure Description

[0017] Appendix Figure 1 This is a three-dimensional structural diagram of the testing fixture in this utility model. Figure 1 .

[0018] Appendix Figure 2 This is a three-dimensional structural diagram of the testing fixture in this utility model. Figure 2 .

[0019] Appendix Figure 3This is a three-dimensional structural diagram of the water bath 1 in this utility model.

[0020] Appendix Figure 4 This is a three-dimensional structural diagram of the first fixing member 4 in this utility model.

[0021] Appendix Figure 5 This is a three-dimensional structural diagram of the second fixing member 5 in this utility model. Figure 1 .

[0022] Appendix Figure 6 This is a cross-sectional structural diagram of the lock cap 54 in this utility model.

[0023] Appendix Figure 7 This is a schematic diagram of the planar structure of the testing device in this utility model.

[0024] Appendix Figure 8 This is a schematic diagram of the planar structure of a balloon dilation catheter.

[0025] The reference numerals in the attached drawings are explained as follows: water bath 1, slide 11, heating plate 12, thermostat 13, drain pipe 14, box cover 2, connecting joint 3, first fixing component 4, first fixing plate 41, first slider 42, first through hole 43, second fixing component 5, second fixing plate 51, second slider 52, clamping cylinder 53, fixing piece 531, shrink groove 532, external thread 533, locking cap 54, conical inner cavity 541, internal thread 542, fixing buckle 6. Detailed Implementation

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The content of the utility model will be further explained below in conjunction with the drawings:

[0027] Example 1

[0028] See attached document Figure 1 , 2 This embodiment provides a balloon dilation catheter rupture testing fixture, including a water bath 1, a cover 2, a connecting connector 3, a first fixing member 4, and a second fixing member 5. This testing fixture can fix the balloon dilation catheter to be tested, immerse it in water, and simultaneously heat and maintain the temperature of the water in the water bath 1.

[0029] See attached document Figure 3The water bath 1 is a hollow, open-top box structure. Slide grooves 11 are provided on opposite sides inside the water bath 1, extending along its length. A drain pipe 14 with a switch is connected to the lower part of one end of the water bath 1. (See attached diagram.) Figure 1 , 2 The lid 2 is hinged to the rear top of the water bath 1 via a hinge. A fixing buckle 6 is provided on the front top of both the lid 2 and the water bath 1 to secure the lid 2 to the top of the water bath 1. The fixing buckle 6 is a commonly used latch or lock, so its structure will not be described in detail. Both the water bath 1 and the lid 2 are made of transparent material (such as acrylic) to facilitate observation of the interior of the water bath 1 and the lid 2 during testing. A handle 21 is fixedly connected to the top surface of the lid 2 for easy opening and closing.

[0030] The connecting connector 3 is fixedly installed at the center of the other end of the water bath 1. Both ends of the connecting connector 3 are equipped with Luer connectors, and the inner cavities of the two Luer connectors are connected. One Luer connector is located inside the inner cavity of the water bath 1 and is used to seal and connect with the head end of the balloon dilation catheter to be tested (i.e., the catheter seat connected to the balloon). The other Luer connector is located outside the water bath 1 and is used to seal and connect with the external liquid supply device.

[0031] In one embodiment, the liquid supply device includes a miniature water pump and an electronic pressure gauge. The outlet pipe of the miniature water pump is sealed to the outer end of the connecting joint 3 via a connecting pipe. The head end of the balloon dilation catheter to be tested is sealed to the inner end of the connecting joint 3. The balloon dilation catheter to be tested passes through the first through hole 43 and the second through hole. The end of the balloon dilation catheter to be tested is fixed to the anti-detachment lock. The miniature water pump is used to pump liquid into the balloon of the balloon dilation catheter to be tested. The electronic pressure gauge is installed on the outlet pipe of the miniature water pump to monitor the hydraulic pressure.

[0032] In another embodiment, the liquid supply device includes a syringe (with a volume of 250ml or 500ml) and an electronic pressure gauge. The tip of the syringe is sealed to the outer end of the connecting connector 3 via a connecting tube. An electronic pressure gauge is also connected to the connecting tube. Liquid is pumped into the balloon of the balloon dilation catheter to be tested through the syringe. The electronic pressure gauge is used to monitor the hydraulic pressure.

[0033] Since the standard requires the water bath temperature to be controlled at 37±2℃ during balloon dilation catheter rupture testing, in order to facilitate the heating and temperature control of the water in water bath 1, please refer to the attached... Figure 3A heating plate 12 is provided at the bottom inside the water bath 1, and a thermostat 13 is provided on the outside of the water bath 1. The thermostat 13 is electrically connected to the heating plate 12 by wires. The thermostat 13 includes a display screen, a temperature adjustment knob and a power socket. The power socket is used to connect an external power cord to supply power to the thermostat 13 and the heating plate 12. The display screen is used to display the heating constant temperature and the real-time water temperature in the water bath 1. The temperature adjustment knob is used to adjust and control the heating constant temperature of the heating plate 12.

[0034] See attached document Figure 1 , 2 4. The first fixing member 4 includes a first fixing plate 41, a first slider 42 and a first through hole 43; two first sliders 42 are fixedly connected to opposite sides of the first fixing plate 41, and the two first sliders 42 are respectively connected to two sliding grooves 11 with clearance fit, and the first sliders 42 can slide along the length direction of the sliding grooves 11. The first through hole 43 is opened at the center of the first fixing plate 41, and the diameter of the first through hole 43 is larger than the diameter of the balloon dilation catheter, so that the balloon dilation catheter can pass through the first through hole 43.

[0035] See attached document Figure 5 , 6 The second fixing member 5 includes a second fixing plate 51, a second slider 52, a second through hole, a clamping cylinder 53, and a locking cap 54. The two second sliders 52 are fixedly connected to opposite sides of the second fixing plate 51. The two second sliders 52 are respectively connected to the two slide grooves 11 with clearance fit, and the second sliders 52 can slide along the length direction of the slide grooves 11. The second through hole is opened at the center of the first fixing plate 41. The diameter of the second through hole is larger than the diameter of the balloon dilation catheter, allowing the balloon dilation catheter to pass through the second through hole.

[0036] At least one first fixing member 4 is provided, and the first fixing member 4 is located between the second fixing member 5 and the connecting joint 3.

[0037] The clamping cylinder 53 has a hollow cylindrical or frustum-shaped structure and is fixedly connected to the side of the second fixing plate 51 away from the first fixing member 4. Its axis coincides with the axis of the second through hole, and its inner cavity is connected to the second through hole. The clamping cylinder 53 includes three arc-shaped fixing plates 531 arranged in a circumferential array with the axis of the second through hole as the center. The fixing plates 531 are elastic plates. A shrinkage groove 532 is reserved between two adjacent fixing plates 531, and an external thread 533 is provided on the outer surface of the fixing plate 531.

[0038] The lock cap 54 has a columnar or frustum-shaped structure with anti-slip texture on its outer side and a tapered inner cavity 541 in its middle. The tapered inner cavity 541 extends out of the front and rear end faces of the lock cap 54. An internal thread 542 that can be threaded to match the external thread 533 is provided on the inner surface of the tapered inner cavity 541.

[0039] The locking cap 54 is screwed onto the clamping cylinder 53 via the internal thread 542 and the external thread 533. When the locking cap 54 is screwed into the clamping cylinder 53, the front ends of the three arc-shaped fixing pieces 531 gradually approach each other along the conical inner cavity 541, the contraction groove 532 narrows, and the inner diameter between the three arc-shaped fixing pieces 531 becomes smaller, thereby clamping the balloon dilation catheter that passes between the three arc-shaped fixing pieces 531 and fixing the balloon dilation catheter. Reverse rotation of the locking cap 54 will release the three arc-shaped fixing pieces 531 from clamping the balloon dilation catheter.

[0040] In order to protect the surface of the balloon dilation catheter from damage by the fixation plate 531 and to increase the friction between the surface of the balloon dilation catheter and the fixation plate 531, a flexible pad is fixed on the inner side of the fixation plate 531. The flexible pad can be made of rubber, silicone, sponge, etc.

[0041] In this embodiment, the balloon dilation catheter burst test fixture is used as follows: First, connect the catheter seat of the balloon dilation catheter to be tested to the Luer connector at the inner end of the connecting connector 3. Then, slide the first fixing member 4 and the second fixing member 5 along the slide groove 11 so that the end of the balloon dilation catheter to be tested passes through the first through hole 43 on the first fixing member 4 and the second through hole on the second fixing member 5 in sequence, so that the first fixing member 4 is located in the middle of the balloon dilation catheter to be tested, and the balloon on the balloon dilation catheter to be tested is located between the first fixing member 4 and the second fixing member 5. Between parts 5, the end of the balloon dilation catheter to be tested passes through the clamping cylinder 53. The locking cap 54 is screwed onto the clamping cylinder 53 through the internal thread 542 and the external thread 533. When the locking cap 54 is screwed into the clamping cylinder 53, the front ends of the three arc-shaped fixing pieces 531 will gradually approach along the conical inner cavity 541, the contraction groove 532 becomes narrower, and the inner diameter between the three arc-shaped fixing pieces 531 becomes smaller, thereby clamping the end of the balloon dilation catheter that passes between the three arc-shaped fixing pieces 531, thus fixing the end of the balloon dilation catheter.

[0042] Add water to the water bath 1 to completely immerse the balloon dilation catheter. Close the lid 2 using handle 21 and secure it with the fastener 6. Connect the power cord to the power socket of the thermostat 13. Set the heating temperature of the heating plate 12 to 37±2℃ using the temperature control knob. Once the real-time water temperature displayed on the screen reaches 37±2℃, the subsequent balloon dilation catheter rupture test can be performed.

[0043] It should be noted that the main function of the balloon dilation catheter burst test fixture in this embodiment 1 is to fix the balloon dilation catheter, completely immerse the balloon dilation catheter in the water bath 1, and protect the balloon dilation catheter with the water bath 1 and the lid 2 to prevent liquid or catheter material from splashing when the catheter ruptures.

[0044] Example 2

[0045] See attached document Figure 7 This embodiment provides a balloon dilatation catheter burst testing device, which includes the balloon dilatation catheter burst testing fixture and liquid supply device in Embodiment 1.

[0046] The liquid supply device includes a miniature water pump and an electronic pressure gauge. The outlet pipe of the miniature water pump is sealed to the outer end of the connecting joint 3 via a connecting pipe. The head end of the balloon dilation catheter under test is sealed to the inner end of the connecting joint 3. The balloon dilation catheter under test passes through the first through hole 43 and the second through hole. The end of the balloon dilation catheter under test is fixed to the anti-detachment lock buckle. The miniature water pump is used to pump liquid into the balloon of the balloon dilation catheter under test. The electronic pressure gauge is installed on the outlet pipe of the miniature water pump to monitor the hydraulic pressure.

[0047] The electronic pressure gauge can be either the CWY122 digital pressure gauge or a memory-type pressure gauge. The CWY122 digital pressure gauge can record the maximum and minimum pressure values ​​during the measurement process. The memory-type pressure gauge mainly consists of a standard pressure gauge and a memory device. When the pressure of the measured medium increases, the pressure pointer drives the memory pointer to rise, and when the pressure decreases, the memory pointer maintains its position to record the highest pressure value.

[0048] The method of using the balloon dilatation catheter burst test device in this embodiment 2 is as follows: First, fix the balloon dilatation catheter to be tested in the balloon dilatation catheter burst test fixture in embodiment 1, and add water to the water bath 1 so that the balloon dilatation catheter is immersed in the water. Then, heat the water in the water bath 1 to a constant temperature of 37±2℃ through the heating plate 12. Next, seal the outlet pipe of the micro water pump to the outer end of the connecting joint 3 through the connecting pipe. Inject water into the balloon of the balloon dilatation catheter through the micro water pump until the balloon is inflated until the catheter bursts or is destroyed. At this time, stop the micro water pump and the heating plate 12, calculate and record the burst pressure through the electronic pressure gauge, and observe and record the catheter failure mode and failure location.

[0049] Obviously, modifications and / or additions can be made to the above-mentioned balloon dilation catheter burst testing fixture and testing device and corresponding methods without departing from the field and scope of this utility model.

[0050] It is equally clear that although this utility model has described the balloon dilatation catheter burst test fixture and testing device in detail, those skilled in the art will certainly be able to obtain many other equivalent forms of balloon dilatation catheter burst test fixtures and testing devices and corresponding methods, which have the features described in the claims and are therefore all within the protection scope defined herein.

Claims

1. A testing fixture for the bursting of a balloon dilation catheter, characterized in that: The device includes a water bath (1), a lid (2), a connecting joint (3), a first fixing member (4), and a second fixing member (5). The lid (2) is hinged to the top of the water bath (1), and the connecting joint (3) is fixedly installed in the middle of one end of the water bath (1). The connecting joint (3) can be sealed to the head end of the balloon dilation catheter to be tested. The first fixing member (4) includes a first fixing plate (41) and a first through hole (43) opened in the middle of the first fixing plate (41). The second fixing member (5) includes a second fixing plate (51), a second through hole opened in the middle of the second fixing plate (51), and an anti-detachment buckle provided on one side of the second fixing plate (51). At least one of the first fixing members (4) and one of the second fixing members (5) are installed inside the water bath (1) through a connecting structure and are both able to move along the length of the water bath (1); the first fixing member (4) is located between the second fixing member (5) and the connecting joint (3); the first through hole (43) and the second through hole are used for the balloon dilation catheter to be tested to pass through; and the anti-detachment buckle is used to fix the end of the balloon dilation catheter to be tested.

2. The balloon dilation catheter burst testing fixture according to claim 1, characterized in that: The connection structure includes a slide groove (11), a first slider (42), and a second slider (52). The two slide grooves (11) are opened on opposite sides inside the water bath (1). The two first sliders (42) are fixedly connected to opposite sides of the first fixed plate (41). The two first sliders (42) are respectively connected to the two slide grooves (11) with a clearance fit, and the first sliders (42) can slide along the slide grooves (11). The two second sliders (52) are fixedly connected to opposite sides of the second fixed plate (51). The two second sliders (52) are respectively connected to the two slide grooves (11) with a clearance fit, and the second sliders (52) can slide along the slide grooves (11).

3. The balloon dilation catheter burst testing fixture according to claim 1, characterized in that: The anti-detachment lock includes a clamping cylinder (53) and a locking cap (54). The clamping cylinder (53) is fixedly connected to one side of the second fixing plate (51), and its inner cavity is connected to the second through hole. The clamping cylinder (53) includes at least two arc-shaped fixing plates (531) arranged in a circular array with the axis of the second through hole as the center. The fixing plates (531) are elastic plates. A shrinkage groove (532) is reserved between two adjacent fixing plates (531), and an external thread (533) is provided on the outer surface of the fixing plate (531). The lock cap (54) is a columnar or frustum-shaped structure with a conical inner cavity (541) in the middle, and the conical inner cavity (541) extends out of the front and rear end faces of the lock cap (54). An internal thread (542) that can be threadedly connected with the external thread (533) is provided on the inner surface of the conical inner cavity (541).

4. The balloon dilation catheter burst test fixture according to claim 3, characterized in that: A flexible pad is fixed on the inner side of the fixing piece (531).

5. The balloon dilation catheter burst test fixture according to claim 1, characterized in that: The water bath (1) also includes a heating plate (12) disposed at the bottom of the inner side of the water bath (1) and a thermostat (13) disposed on the outer side of the water bath (1). The heating plate (12) and the thermostat (13) are electrically connected. The thermostat (13) includes a display screen and a temperature adjustment knob. The display screen is used to display the heating constant temperature and the real-time water temperature in the water bath (1). The temperature adjustment knob is used to adjust the heating constant temperature of the heating plate (12).

6. The balloon dilation catheter burst testing fixture according to claim 1, characterized in that: The lid (2) is hinged to one side of the top of the water bath (1) via a hinge. A fixing buckle (6) is provided on the other side of the lid (2) and the water bath (1). The fixing buckle (6) is used to fix the lid (2) to the top of the water bath (1).

7. The balloon dilation catheter burst testing fixture according to claim 1, characterized in that: The water bath (1) and the lid (2) are both made of transparent material. A drain pipe (14) with a switch is connected to the lower part of the outside of the water bath (1). A handle (21) is fixedly connected to the top surface of the lid (2).

8. The balloon dilation catheter burst test fixture according to claim 1, characterized in that: Both ends of the connecting connector (3) are provided with Luer connectors. One Luer connector is located inside the water bath (1) and is used to seal the connection with the head end of the balloon dilation catheter to be tested. The other Luer connector is located outside the water bath (1) and is used to seal the connection with the external liquid supply device. The liquid supply device is used to inject liquid medium into the balloon and monitor the hydraulic pressure.

9. A balloon dilation catheter burst testing device, characterized in that: The device includes a liquid supply device and a balloon dilation catheter burst test fixture according to any one of claims 1-8; the liquid supply device includes a miniature water pump and an electronic pressure gauge, the outlet pipe of the miniature water pump is sealed to the outer end of the connecting joint (3) through a connecting pipe, the head end of the balloon dilation catheter to be tested is sealed to the inner end of the connecting joint (3), and the balloon dilation catheter to be tested passes through the first through hole (43) and the second through hole, and the end of the balloon dilation catheter to be tested is fixed on the anti-detachment lock buckle; the miniature water pump is used to pump liquid into the balloon of the balloon dilation catheter to be tested; the electronic pressure gauge is installed on the outlet pipe of the miniature water pump for monitoring the hydraulic pressure.

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