Support structure and valve test fixture

Abstract

The utility model discloses a support structure and valve test fixture belongs to medical instrument technical field, the support structure includes first support body, second support body, suture, second support body is equipped with at least two first connecting hole, first support body is sleeved outside second support body, and first support body at least part is provided in first connecting hole, suture is provided with second connecting hole, second support body is equipped with second connecting hole, second support body is equipped with second connecting hole, second support body is equipped with second connecting hole, second support body is equipped with second connecting hole. The hardness of the first support body is smaller than that of the second support body; a suture passes through the first connecting hole, so that the valve sheet is fixed on the first support body by the suture. The first supporting body is used for being in flexible contact with the valve piece to avoid rigid contact with the valve piece, the second supporting body is used for improving the stability of the first supporting body in supporting the valve piece, and the first supporting body is at least partially arranged in the first connecting hole of the second supporting body to increase the connecting area of the first supporting body and the second supporting body; a suture penetrates through the first connecting hole and fixes the valve piece to the first supporting body, and the stability of the valve piece on the supporting structure is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, in particular to a support structure and a valve test fixture. Background Art

[0002] When testing the performance of valve sheets, the existing valve sheets are clamped on both sides by hard blocks for fatigue or conventional tests. When simulating the internal contraction and relaxation pressure of the human body (such as the aortic valve pressure difference of 100 mmHg), since the valve sheet is a soft tissue, the hard block is likely to clamp and damage the valve sheet. Moreover, in the case of a relatively large pressure difference, the fixing part of the valve sheet and the hard block will be partially pulled apart or the valve sheet will be washed away, failing to achieve the purpose of the test. However, if the elastic member is completely used to clamp the valve sheet, the self-supporting stability of the elastic member is poor, resulting in poor stability of the valve sheet during the test. Summary of the Utility Model

[0003] The purpose of the utility model is to improve the problems that the existing support structure is likely to clamp and damage the valve sheet and the stability of the valve sheet during the test is relatively low, and to provide a support structure and a valve test fixture.

[0004] The technical solutions for achieving the above purpose include the following:

[0005] A support structure includes: a first support body and a second support body. There are at least two first connection holes in the second support body. The first support body is sleeved outside the second support body, and at least part of the first support body is arranged in the first connection holes. The hardness of the first support body is less than that of the second support body; at least part of the first support body is made of an elastic material and is used for flexibly supporting the valve sheet;

[0006] Wherein, the first connection holes are for sutures to pass through so that the sutures fix the valve sheet on the first support body.

[0007] In one embodiment, there are multiple first connection holes, and the multiple first connection holes are arranged in a circumferential array along the second support body. The first connection holes penetrate from one side of the second support body to the other side of the second support body.

[0008] In one embodiment, the second support body is in a ring shape, and there is a circular avoidance hole in the second support body.

[0009] In one embodiment, the second support body further has multiple second connection holes, and the multiple second connection holes are arranged in a circumferential array along the second support body and are close to the avoidance hole.

[0010] In one embodiment, the aperture of the second connection hole is smaller than that of the first connection hole, and the second connection holes penetrate from one side of the second support body to the other side of the second support body.

[0011] In one embodiment, the support structure further has at least three support feet, and the three support feet are installed at the bottom of the second support body and are equidistantly distributed along the circumferential direction of the second support body.

[0012] In one embodiment, at least part of the first support body is made of an elastic material; at least part of the second support body is made of one of polypropylene, polyethylene, and polycarbonate.

[0013] In one embodiment, the first support body is a structure made of silica gel.

[0014] The present utility model also provides a valve test fixture, which includes two clamping blocks and the support structure as described above. A clamping position is formed between the two clamping blocks, and the support structure is installed on the clamping position; and the two clamping blocks respectively abut against both ends of the support structure.

[0015] In one embodiment, the clamping block is in an annular structure, the outer diameter of the clamping block is larger than the outer diameter of the support structure, the clamping block has a plurality of mounting holes, the plurality of mounting holes are equidistantly distributed along the circumferential direction of the clamping block, and the mounting holes are arranged close to the outer wall of the clamping block.

[0016] The technical solution provided by the present utility model has the following advantages and effects:

[0017] By sleeving the first support body outside the second support body, and the hardness of the first support body is less than the hardness of the second support body, at least part of the first support body is made of an elastic material and is used for flexibly supporting the valve leaflet; the first support body is used for making flexible contact with the valve leaflet to avoid making rigid contact with the valve leaflet and avoid the test fixture from pinching the valve leaflet; the second support body is used for improving the stability of the first support body in supporting the valve leaflet. Moreover, at least part of the first support body is arranged in the first connection hole of the second support body, so that the connection area between the first support body and the second support body can be increased, and the integrity of the first support body and the second support body can be improved. When fixing the valve, by passing a suture through the first connection hole and fixing the valve leaflet on the first support body, the stability of the valve leaflet on the support structure is improved, and the problem that the existing support structure is easy to pinch the valve leaflet, resulting in a reduction in the structural stability of the valve leaflet, is solved. Description of the Drawings

[0018] The accompanying drawings here show specific examples of the technical solution of the present utility model and form a part of the description together with the specific implementation manners, and are used to explain the technical solution, principle, and effects of the present utility model.

[0019] Unless otherwise specified or defined, in different drawings, the same reference numerals represent the same or similar technical features. For the same or similar technical features, different reference numerals may also be used for representation.

[0020] Figure 1 is the top view of the support structure in an embodiment of the present utility model;

[0021] Figure 2 is an embodiment of the present utility model Figure 1 A-A cross-section of Figure 1 ;

[0022] Figure 3 is an embodiment of the present utility model Figure 1 A-A cross-section of Figure 2 ;

[0023] Figure 4 is the connection diagram of the valve and the support structure in an embodiment of the present utility model;

[0024] Figure 5 is the schematic diagram of the valve test fixture in an embodiment of the present utility model;

[0025] Description of reference numerals:

[0026] 100, support structure; 1, first support body; 2, second support body; 21, first connection hole; 22, second connection hole; 23, avoidance hole; 24, support foot; 3, valve sheet; 4, suture; 5, clamping block; 51, mounting hole; 200, test fixture. Detailed implementation manners

[0027] To facilitate the understanding of the present utility model, the specific embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings of the specification.

[0028] Unless otherwise specified or defined, the "first, second..." used herein is only for distinguishing names and does not represent a specific quantity or order.

[0029] Unless otherwise specified or defined, the term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0030] It should be noted that when an element is considered to be "fixed to" another element, it can be directly fixed to the other element or there can be an intermediate element; when an element is considered to be "connected to" another element, it can be directly connected to the other element or there can be an intermediate element at the same time; when an element is considered to be "mounted on" another element, it can be directly mounted on the other element or there can be an intermediate element at the same time. When an element is considered to be "provided in" another element, it can be directly provided in the other element or there can be an intermediate element at the same time.

[0031] To avoid rigid contact between the valve leaflet 3 and the support structure 100 and improve the stability of the valve leaflet 3 on the support structure 100. As Figures 1 to 4 shown, a support structure 100 includes a first support body 1 and a second support body 2. There are at least two first connection holes 21 in the second support body 2. The first support body 1 is sleeved outside the second support body 2, and at least part of the first support body 1 is arranged in the first connection holes 21. The hardness of the first support body 1 is less than that of the second support body 2; at least part of the first support body 1 is made of an elastic material and is used to flexibly support the valve leaflet 3; wherein, the first connection holes 21 are for the suture 4 to pass through so that the suture 4 fixes the valve leaflet 3 on the first support body 1. By sleeving the first support body 1 outside the second support body 2 and the hardness of the first support body 1 being less than that of the second support body 2, the first support body 1 is used to make flexible contact with the valve leaflet 3, avoiding rigid contact with the valve leaflet 3 and preventing the test fixture 200 from pinching the valve leaflet 3; the second support body 2 is used to improve the stability of the first support body 1 in supporting the valve leaflet 3. Moreover, at least part of the first support body 1 is arranged in the first connection holes 21 of the second support body 2, which can increase the connection area between the first support body 1 and the second support body 2 and improve the integrity of the first support body 1 and the second support body 2. When fixing the valve leaflet 3, by passing the suture 4 through the first connection holes 21 and fixing the valve leaflet 3 on the first support body 1, the stability of the valve leaflet 3 on the support structure 100 is improved, and the problem that the existing support structure 100 is likely to pinch the valve leaflet 3, resulting in a decrease in the structural stability of the valve leaflet 3, is solved.

[0032] To improve the connection stability between the valve leaflet 3 and the first support body 1 and improve the integrity of the first support body 1 and the second support body 2. As Figures 1 to 3As shown, there are multiple first connection holes 21. The multiple first connection holes 21 are arranged in a circumferential array along the second support 2, and the first connection holes 21 penetrate from one side of the second support 2 to the other side of the second support 2. By providing multiple first connection holes 21 and arranging them in a circumferential array along the second support 2, since the first connection holes 21 are used for the suture 4 to pass through and then fix the valve leaflet 3 on the first support 1, the multiple first connection holes 21 indicate that there are multiple connection points between the valve leaflet 3 and the first support 1, which can improve the connection stability between the valve leaflet 3 and the first support 1. Moreover, the first support 1 and the second support 2 can be processed by injection molding. After the second support 2 is processed, the second support 2 is placed in a mold, and a liquid elastic material is poured in. After the liquid elastic material in the mold hardens, the first support 1 is formed. The first support 1 will be distributed in the multiple first connection holes 21. Through the multiple first connection holes 21, the connection area between the first support 1 and the second support 2 is increased, and the integrity of the first support 1 and the second support 2 is improved.

[0033] For the convenience of testing the valve leaflet 3. As Figure 1 shown, the second support 2 is annular, and there is a circular avoidance hole 23 inside the second support 2. This avoidance hole 23 is used to avoid the test area of the valve leaflet 3 when the valve leaflet 3 is tested on the support structure 100, which is convenient for applying pressure to the valve leaflet 3 so that the valve leaflet 3 can complete the durability test. During the test, the center of the valve leaflet 3 is the stress point, driving the valve leaflet 3 to deform by spreading outwards from the center. The circular avoidance hole 23 is used to prevent interference when the valve leaflet 3 spreads outwards from the center after being stressed.

[0034] To further improve the integrity of the first support 1 and the second support 2. As Figures 1 to 3As shown, the second support body 2 further has a plurality of second connection holes 22. The plurality of second connection holes 22 are arranged in a circumferential array along the second support body 2, and the plurality of second connection holes 22 are arranged close to the avoidance hole 23. The aperture of the second connection hole 22 is smaller than that of the first connection hole 21, and the second connection hole 22 penetrates from one side of the second support body 2 to the other side of the second support body 2. The second connection hole 22 is used for the liquid first support body 1 to flow into the plurality of second connection holes 22 during the injection molding process of the first support body 1, so as to increase the connection area between the first support body 1 and the second support body 2 and improve the integrity of the first support body 1 and the second support body 2. Since the aperture of the second connection hole 22 is smaller than that of the first connection hole 21, and the positions of the plurality of first connection holes 21 and the plurality of second connection holes 22 on the upper surface of the support structure 100 are different, and the plurality of second connection holes 22 are arranged close to the avoidance hole 23; therefore, the installation surface formed by the plurality of first connection holes 21 is larger than the installation surface formed by the second connection holes 22. The plurality of first connection holes 21 are used to adapt to the testing of larger valve leaflets 3, and the plurality of second connection holes 22 are used to adapt to the testing of smaller valve leaflets 3, so as to improve the adaptability of the support structure 100 while improving its integrity.

[0035] In order to realize that the first support body 1 wraps the second support body 2. As Figure 1 and Figure 3 shown, the support structure 100 further has at least three support feet 24. The three support feet 24 are installed at the bottom of the second support body 2, and the three support feet 24 are equidistantly distributed along the circumference of the second support body 2. When processing the support structure 100, the second support body 2 is supported by the support feet 24, so that the liquid first support body 1 flows into the bottom of the second support body 2. After the first support body 1 is cured, the first support body 1 wraps the second support body 2 from all around, thus avoiding large-area exposure of the bottom of the second support body 2 and realizing that the first support body 1 wraps the second support body 2; moreover, the volume of the support feet 24 is small, and the influence on the support structure 100 is small.

[0036] In order to make the support structure 100 flexibly connected to the valve leaflet 3. In addition, at least part of the first support body 1 is made of an elastic material; at least part of the second support body 2 is made of one of polypropylene, polyethylene, and polycarbonate. The first support body 1 is made of an elastic material, which can reduce the damage to the valve leaflet 3 when the first support body 1 supports or fixes the valve leaflet 3; the second support body 2 is made of a material with a relatively hard texture, which can improve the support strength of the second support body 2, thereby improving the support stability of the support structure 100.

[0037] In addition, the first support 1 is a member made of silica gel. Silica gel has an open porous structure with strong adsorption ability and can adsorb various substances. Adding dilute sulfuric acid (or hydrochloric acid) to the aqueous solution of sodium silicate and allowing it to stand will result in the formation of a hydrated silicic acid gel that solidifies. Washing with water to remove the dissolved electrolyte Na+ and SO42-(Cl-) ions, and then drying, silica gel can be obtained. Therefore, it is more convenient to use silica gel when processing with the second support 2, and the formed support structure 100 has better integrity.

[0038] To achieve the performance test of the valve sheet 3. As Figure 5 shown, the present utility model also provides a valve test fixture 200, which includes two clamping blocks 5 and the support structure 100 as described above. A clamping position is formed between the two clamping blocks 5, and the support structure 100 is installed at the clamping position; and the two clamping blocks 5 respectively abut against both ends of the support structure 100. As a medical device implanted into the human body, an artificial heart valve is required to operate reliably for a long time after implantation, and its service life is crucial. The durability test is to make the valve continuously open and close in a high-frequency reciprocating flow field to accelerate the aging and wear of its materials and the failure of its structure, so as to evaluate the durability life of the valve and determine the expected failure mode of the valve. By clamping the support structure 100 with the two clamping blocks 5, then the testing device applies pressure to the valve sheet 3 and continuously repeats squeezing the valve sheet 3 to complete the durability test of the valve sheet 3.

[0039] To facilitate the fixation of the test fixture 200 to the testing device. As Figure 5 shown, the clamping block 5 has an annular structure. The outer diameter of the clamping block 5 is larger than the outer diameter of the support structure 100. The clamping block 5 is provided with a plurality of mounting holes 51, and the plurality of mounting holes 51 are equidistantly distributed along the circumferential direction of the clamping block 5. The mounting holes 51 are arranged close to the outer wall of the clamping block 5. A plurality of mounting holes 51 are provided on the clamping block 5. Fasteners pass through the mounting holes 51 to fix the clamping block 5 to the testing device.

[0040] When referring to the drawings for explanation, it is to explain the newly appeared features; in order to avoid repeated reference to the drawings resulting in a less concise description, for the features that have been described clearly, the drawings are not cited one by one.

[0041] The purpose of the above embodiments is to exemplarily reproduce and deduce the technical solutions of the present utility model, and to completely describe the technical solutions, purposes and effects of the present utility model. The purpose is to make the public understand the disclosed content of the present utility model more thoroughly and comprehensively, and it does not limit the protection scope of the present utility model.

[0042] The above embodiments are not an exhaustive list based on the present utility model. In addition, there may be multiple other embodiments not listed. Any substitution and improvement made on the basis of not violating the concept of the present utility model fall within the protection scope of the present utility model.

Claims

1. A supporting structure, characterized in that: include: A first support body and a second support body, wherein the second support body has at least two first connection holes, the first support body is sleeved outside the second support body, and at least a portion of the first support body is disposed in the first connection holes, and the hardness of the first support body is less than that of the second support body; the first support body is at least partially made of elastic material and is used to flexibly support the valve sheet; The first connecting hole is used for sutures to pass through, so that the sutures can fix the valve sheet on the first support body.

2. The support structure according to claim 1, characterized in that There are a plurality of the first connection holes, and the plurality of first connection holes are distributed in a circumferential array along the second support body. The first connection holes penetrate from one side of the second support body to the other side of the second support body.

3. The support structure according to claim 2, characterized in that: The second support body is in a ring shape and has a circular avoidance hole therein.

4. The support structure according to claim 3, characterized in that The second support body also has a plurality of second connection holes, which are arranged in a circumferential array along the second support body and are arranged close to the avoidance holes.

5. The support structure according to claim 4, characterized in that The diameter of the second connection hole is smaller than that of the first connection hole, and the second connection hole penetrates from one side of the second support body to the other side of the second support body.

6. The support structure according to any one of claims 1 to 5, characterized in that: The support structure also has at least three support feet, which are installed on the bottom of the second support body and are evenly distributed along the circumference of the second support body.

7. The support structure according to any one of claims 1 to 5, characterized in that: At least a portion of the first support body is made of elastic material; at least a portion of the second support body is made of one of polypropylene, polyethylene and polycarbonate.

8. The support structure according to claim 7, characterized in that: The first support is a structure made of silica gel.

9. A valve test fixture, characterized in that: The supporting structure comprises two clamping blocks and the supporting structure as claimed in claims 1 to 8, wherein a clamping position is formed between the two clamping blocks, and the supporting structure is installed on the clamping position; and the two clamping blocks are respectively against two ends of the supporting structure.

10. The valve test fixture according to claim 9, characterized in that: The clamp block is annular in structure, the outer diameter of the clamp block is larger than the outer diameter of the supporting structure, the clamp block is provided with a plurality of mounting holes, the plurality of mounting holes are evenly distributed along the circumference of the clamp block, and the mounting holes are arranged close to the outer wall of the clamp block.

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