Puncture device for testing strength of artificial blood vessel

Abstract

The utility model relates to the technical field of artificial blood vessels, in particular to a puncture device for artificial blood vessel strength testing, which comprises an artificial blood vessel supporting component and an artificial blood vessel puncture component, the artificial blood vessel puncture component comprises a movable puncture needle, and the artificial blood vessel supporting component is positioned below the puncture needle; according to the device, a special artificial blood vessel supporting assembly is designed and comprises a sleeve with a strip-shaped opening and an internal soft filling rod, and the sleeve is used for keeping the shape of the artificial blood vessel stable in the testing period; meanwhile, the movable puncture needle and the cross-shaped sliding table are matched, so that the puncture position and force can be controlled; by means of the design, the automation degree of the testing process is improved, the reliability and reproducibility of the testing result are greatly enhanced, manufacturers and medical institutions can evaluate the quality of the artificial blood vessel more accurately, and the safety of patients is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of artificial blood vessels, in particular to a puncture device for testing the strength of artificial blood vessels. Background Art

[0002] In the medical field, artificial blood vessels are widely used to replace or supplement the body's own blood vessels, especially during hemodialysis when the patient's own arteriovenous fistula is difficult to establish. Artificial blood vessels need to withstand repeated puncture operations to connect to dialysis equipment, which requires them to have sufficient strength and durability to ensure safety and effectiveness in long-term use. Therefore, performance testing of artificial blood vessels is crucial, especially for the number of punctures they can withstand and their structural integrity afterwards.

[0003] The existing artificial blood vessel strength test method usually relies on the manual puncture process, that is, the medical staff directly punctures the artificial blood vessel with a handheld puncture needle. However, this method has obvious limitations: on the one hand, since the artificial blood vessel material is soft, it is easy to deform without proper support, resulting in unstable puncture position and difficulty in accurately controlling the distance between needle holes; on the other hand, manual operation cannot ensure the consistency of the angle and strength of each puncture, which affects the consistency and accuracy of the test results.

[0004] The main problem with the above existing technologies is that the direct puncture method cannot provide stable and repeatable test conditions, and thus cannot accurately evaluate the true strength and durability of artificial blood vessels. In particular, when simulating high-frequency, multi-point puncture scenarios commonly seen in clinical environments, traditional methods are particularly inadequate. Utility Model Content

[0005] The purpose of the utility model is to provide a puncture device for testing the strength of an artificial blood vessel, which not only improves the automation of the test process, but also greatly enhances the reliability and reproducibility of the test results, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a puncture device for testing the strength of an artificial blood vessel, characterized in that it comprises an artificial blood vessel support component and an artificial blood vessel puncture component, the artificial blood vessel puncture component comprises a movable puncture needle, and the artificial blood vessel support component is located below the puncture needle; wherein the artificial blood vessel support component comprises: a sleeve, a surface of the sleeve is provided with a strip opening for the puncture needle to work; a soft filling rod inserted into the interior of the sleeve and sleeved with an artificial blood vessel, and the artificial blood vessel is located between the outer wall of the soft filling rod and the inner wall of the sleeve.

[0007] Preferably, the artificial blood vessel puncture assembly further comprises: a frame; a cross slide mounted on the side of the frame for driving the puncture needle to move up, down, left and right; wherein the puncture needle is mounted on the slide of the cross slide via a connector.

[0008] Preferably, the connecting member includes: a connecting rail fixed on the slide of the cross slide; a slider slidably connected to the connecting rail for adjusting the front and rear position of the puncture needle; wherein the slider is locked on the connecting rail by bolts.

[0009] Preferably, the puncture needle is installed at the bottom of the slider, and the puncture needle faces the strip-shaped opening.

[0010] Preferably, a clamping assembly for fixing the sleeve is also included.

[0011] Preferably, the clamping assembly includes: a base; a support plate fixed to the top of the base for supporting the sleeve; and a locking bolt threadedly connected to the top of the support plate for clamping the sleeve.

[0012] Preferably, an arc-shaped groove matching the sleeve is formed on the top of the support plate.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The device is designed with a special artificial blood vessel support component, which includes a sleeve with a strip opening and an internal soft filling rod, which is used to keep the shape of the artificial blood vessel stable during the test; at the same time, with the movable puncture needle and the cross slide, the puncture position and force can be controlled; such a design not only improves the automation level of the test process, but also greatly enhances the reliability and reproducibility of the test results, so that manufacturers and medical institutions can more accurately evaluate the quality of artificial blood vessels and ensure the safety of patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the puncture device of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the artificial blood vessel support assembly of the utility model;

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the sleeve of the utility model;

[0018] Figure 4 It is a three-dimensional structural schematic diagram of the sleeve of the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the artificial blood vessel puncture assembly of the utility model;

[0020] Figure 6 It is a structural schematic diagram of the connecting piece of the utility model;

[0021] Figure 7 It is a structural schematic diagram of the clamping assembly of the utility model.

[0022] In the figure:

[0023] 100. artificial blood vessel support assembly; 101. sleeve; 102. strip opening; 103. soft filling rod; 104. artificial blood vessel;

[0024] 200, artificial blood vessel puncture assembly; 201, puncture needle; 202, rack; 203, cross slide; 204, connector; 205, connecting guide rail; 206, slider;

[0025] 300, clamping assembly; 301, base; 302, support plate; 303, locking bolt; 304, arc-shaped groove. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The utility model provides a technical solution: a puncture device for testing the strength of artificial blood vessels, which aims to improve the accuracy and efficiency of repeated puncture strength tests on artificial blood vessels. Figure 1 As shown, it includes an artificial blood vessel support component 100, an artificial blood vessel puncture component 200 and a clamping component 300.

[0028] The artificial blood vessel puncture assembly 200 includes a movable puncture needle 201, the artificial blood vessel support assembly 100 is located below the puncture needle 201, and the clamping assembly 300 is used to fix the artificial blood vessel so that the puncture needle 201 can puncture the artificial blood vessel.

[0029] In this embodiment, if Figure 2-4 As shown, the artificial blood vessel support component 100: This component includes a sleeve 101, and a strip opening 102 is opened on its surface to allow the puncture needle 201 to move freely in the specified area. A soft filling rod 103 (silicone, rubber, etc.) is arranged inside the sleeve to support the artificial blood vessel to be tested, ensuring that it maintains a stable shape during the puncture process and preventing deformation or collapse caused by the softness of the blood vessel itself. In this way, the position of each puncture can be relatively fixed, thereby improving the consistency and repeatability of the test results.

[0030] The strip opening 102 provides space for the puncture needle 201 to work, and the artificial blood vessel 104 is sleeved on the outside of the soft filling rod 103 so that the artificial blood vessel 104 is located between the outer wall of the soft filling rod 103 and the inner wall of the sleeve 101 .

[0031] Preferably, the strip opening 102 has an area of ​​1 square centimeter, which allows the puncture needle 201 to puncture the artificial blood vessel 104 24 times. According to the test method specified in YY / T 0500, 24 punctures are required per square centimeter on the outer surface of the artificial blood vessel. Since the puncture area is relatively small and the pinhole is relatively large, manual puncture is difficult to implement. The present application can accurately control the direction of the needle insertion, the spacing and the arrangement of the pinholes, thereby improving the efficiency and accuracy of the test.

[0032] In this embodiment, if Figure 5-6 As shown, the artificial blood vessel puncture assembly 200: This part includes a cross slide 203 installed on the frame 202, which can drive the puncture needle 201 to achieve precise movement up, down, left and right. In addition, the connecting piece 204 (composed of a connecting guide rail 205 and a slider 206) further enhances the ability to adjust the position of the puncture needle, allowing the user to flexibly adjust the distance and arrangement of the puncture points as needed. This mechanical design ensures that the puncture operation can be completed under strict control, avoiding the errors that may be caused by manual puncture, while supporting automated testing processes and greatly improving work efficiency. The details are as follows:

[0033] The frame 202 provides support for the cross slide 203 , which is mounted on the side of the frame 202 to drive the puncture needle 201 to move up, down, left and right; the puncture needle 201 is mounted on the slide of the cross slide 203 through a connector 204 .

[0034] Specifically, the cross slide 203 is installed vertically, and the slide in the Y-axis direction can drive the slide in the X-axis direction to move up and down, and the slide in the X-axis direction can drive the puncture needle 201 to move left and right, thereby realizing the up, down, left and right movement of the puncture needle 201.

[0035] Further, the connecting member 204 includes:

[0036] Connecting rail 205: This rail is fixedly mounted on the slide of the cross slide 203 and serves as a guide path for the slider 206. The connecting rail 205 is made of a high-strength, low-friction material (such as polytetrafluoroethylene) to ensure that the slider moves smoothly on it while maintaining sufficient rigidity and stability to avoid deformation due to long-term use or frequent operation.

[0037] Slider 206: The slider 206 forms a sliding connection with the connecting guide rail 205, allowing it to slide freely along the length direction of the guide rail, thereby adjusting the position of the puncture needle 201 relative to the artificial blood vessel support assembly 100. In order to achieve this, a precision-machined ball bearing or similar low-friction rolling element is provided inside the slider to reduce the movement resistance and ensure the smoothness of the position adjustment. In addition, the slider is also designed with a mounting groove, which is in the shape of a through hole. The puncture needle 201 is inserted into the mounting groove. The side of the mounting groove is penetrated by a screw for firmly fixing the puncture needle 201 to ensure that there will be no loosening or deviation during the puncture process. The puncture needle 201 is installed at the bottom of the slider 206, and the puncture needle 201 faces the strip opening 102.

[0038] Bolt locking mechanism: When the position of the puncture needle 201 needs to be fixed, the bolt (not shown) provided on the slider 206 can be tightened to press it against the connecting guide rail 205, thereby locking the slider 206 in a specific position. This locking mechanism is simple and effective, which can be quickly released for position adjustment when necessary, and can provide a reliable fixing effect during the test to prevent any unnecessary displacement from affecting the test results.

[0039] like Figure 7 As shown, the clamping assembly 300 in this embodiment is used to fix the sleeve 101, and the clamping assembly 300 includes: a base 301; a support plate 302 fixed on the top of the base 301 for supporting the sleeve 101; and a locking bolt 303 threadedly connected to the top of the support plate 302 for clamping the sleeve 101. The top of the support plate 302 is provided with an arc groove 304 matching the sleeve 101.

[0040] The clamping assembly 300 is used to firmly fix the sleeve 101 in order to ensure stability during the entire test process. The support plate 302 fixed on the base 301 not only provides a stable foundation, but also has a specially designed arc groove 304 on its top to fit the sleeve shape, and the locking bolt 303 makes the entire system more solid and reliable. This helps to reduce external interference and ensure that the test environment is as close to the actual use conditions as possible.

[0041] In another embodiment, the base 301 and the frame 202 may be fixed on a bottom plate, thereby limiting the position and improving the overall stability.

[0042] In summary, in this embodiment, a special artificial blood vessel support component is designed, which includes a sleeve with a strip opening and an internal soft filling rod, which is used to maintain the shape of the artificial blood vessel stable during the test; at the same time, with the movable puncture needle and the cross slide, the puncture position and force can be controlled; such a design not only improves the degree of automation of the test process, but also greatly enhances the reliability and reproducibility of the test results, so that manufacturers and medical institutions can more accurately evaluate the quality of artificial blood vessels and ensure the safety of patients.

[0043] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A puncture device for testing the strength of an artificial blood vessel, characterized in that: It comprises an artificial blood vessel support assembly (100) and an artificial blood vessel puncture assembly (200), wherein the artificial blood vessel puncture assembly (200) comprises a movable puncture needle (201), and the artificial blood vessel support assembly (100) is located below the puncture needle (201); Wherein, the artificial blood vessel support assembly (100) comprises: A sleeve (101), wherein a surface of the sleeve (101) is provided with a strip-shaped opening (102) for the puncture needle (201) to work; A soft filling rod (103) is inserted into the interior of the sleeve (101) and sleeved with an artificial blood vessel, and the artificial blood vessel is located between the outer wall of the soft filling rod (103) and the inner wall of the sleeve (101).

2. The puncture device for testing the strength of an artificial blood vessel according to claim 1, characterized in that: The artificial blood vessel puncture assembly (200) further comprises: Rack(202); A cross slide (203) mounted on the side of the frame (202) and used for driving the puncture needle (201) to move up, down, left, and right; The puncture needle (201) is mounted on the slide of the cross slide (203) via a connecting piece (204).

3. The puncture device for testing the strength of an artificial blood vessel according to claim 2, characterized in that: The connecting member (204) comprises: A connecting guide rail (205) fixed on the slide of the cross slide (203); A slider (206) slidably connected to the connecting guide rail (205) and used for adjusting the front and rear position of the puncture needle (201); The sliding block (206) is fastened to the connecting guide rail (205) by means of bolts.

4. The puncture device for testing the strength of an artificial blood vessel according to claim 3, characterized in that: The puncture needle (201) is installed at the bottom of the slider (206), and the puncture needle (201) faces the strip-shaped opening (102).

5. The puncture device for testing the strength of an artificial blood vessel according to claim 2, characterized in that: Also included is a clamping assembly (300) for fixing the sleeve (101).

6. The puncture device for testing the strength of an artificial blood vessel according to claim 5, characterized in that: The clamping assembly (300) comprises: Base (301); A support plate (302) fixed to the top of the base (301) and used to support the sleeve (101); A locking bolt (303) threadedly connected to the top of the support plate (302) for clamping the sleeve (101).

7. The puncture device for testing the strength of an artificial blood vessel according to claim 6, characterized in that: The top of the support plate (302) is provided with an arc-shaped groove (304) matching the sleeve (101).

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