A metal prosthetic heart valve stent

Abstract

The application provides a metal artificial heart valve support and relates to the field of artificial heart valve supports.The metal artificial heart valve support comprises a tubular outer support, a tubular inner support, a suture and an artificial heart valve, the tubular inner support is arranged in the tubular outer support, and the artificial heart valve is arranged between the tubular outer support and the tubular inner support; and the artificial heart valve is fixedly connected between the tubular outer support and the tubular inner support by the suture. In the application, the tubular outer support and the tubular inner support are cooperatively designed, so that when the artificial heart valve is fixed to the tubular outer support and the tubular inner support, the artificial heart valve can be arranged in the tubular outer support, the tubular inner support is arranged in the artificial heart valve, and then the artificial heart valve is fixed to the tubular outer support and the tubular inner support by the suture, so that the artificial heart valve is effectively supported, and the stability of the artificial heart valve is improved.

Description

Technical Field

[0001] This invention relates to the field of artificial heart valve stent technology, and more particularly to a metal artificial heart valve stent. Background Technology

[0002] Heart valve disease is one of the most common cardiovascular diseases, and its incidence is increasing year by year with the aging population. Traditional open-heart valve replacement surgery is highly invasive and risky, and many elderly or frail patients cannot tolerate it. In recent years, minimally invasive interventional techniques such as transcatheter aortic valve replacement (TAVR) have developed rapidly. By compressing an artificial heart valve into a delivery sheath and delivering it to the target location via a vascular pathway, it can effectively replace the function of the diseased natural valve, with significant advantages such as minimal trauma and rapid recovery. As the core load-bearing component of interventional artificial heart valves, artificial heart valve stents are mostly made of metal and can be divided into long stents and short stents. They mainly serve to support and fix the artificial heart valve, and their structural performance directly determines the stability of valve implantation and postoperative hemodynamic effects.

[0003] In the application of traditional artificial heart valve stents, the artificial heart valve generally relies solely on the outer stent for support, without an effective reinforcing support structure on the inner side. This results in the need to further improve the stability of the artificial heart valve. At the same time, since artificial heart valves are mostly fixed to the outside of the stent rod with sutures, and the stent rod is often inclined, the sutures are prone to slippage on the outside of the inclined rod, which reduces the firmness of the connection between the artificial heart valve and the stent. In addition, since the outer structure of the artificial heart valve leaflet is directly fixed to the upper part of the stent through sutures, the stress concentration at the suture site can easily lead to leaflet tearing damage over time, affecting the overall service life of the artificial heart valve. Summary of the Invention

[0004] This invention relates to a metal artificial heart valve stent, which solves the problems of traditional artificial heart valve stents where the lack of a reinforcing support structure on the inner side of the artificial heart valve leads to insufficient stability, the easy slippage of sutures on the outside of the stent's inclined rod, which reduces the firmness of the connection between the artificial heart valve and the stent, and the stress concentration at the sutures on the outer side of the valve leaflets, which can easily lead to leaflet tearing and damage over time, affecting service life.

[0005] In a first aspect, the present invention provides a metal artificial heart valve stent, specifically comprising: a tubular external stent, a tubular internal stent, sutures, and an artificial heart valve, wherein the tubular external stent contains the tubular internal stent, and the artificial heart valve is disposed between the interior of the tubular external stent and the exterior of the tubular internal stent; the artificial heart valve is fixedly connected between the tubular external stent and the tubular internal stent by sutures.

[0006] Furthermore, both the tubular outer support and the tubular inner support are integrally formed hollow mesh structures of nickel-titanium alloy superelastic metal.

[0007] Furthermore, both ends of the tubular outer support are provided with arched reinforcing frames in a circular array, and the arched reinforcing frames and the tubular outer support are integrally formed.

[0008] Furthermore, the tubular outer support has uniformly spaced wire holes A.

[0009] Furthermore, the tubular inner support has uniformly spaced wire holes B.

[0010] Furthermore, the upper part of the tubular external stent is fixedly connected with three metal clamps in a ring array, and the three metal clamps are clamped on the outer side of the upper leaflet of the artificial heart valve; the outer side of the upper leaflet of the artificial heart valve is fixedly connected to the metal clamps by sutures.

[0011] Furthermore, the metal clamping member has uniformly arranged wire-passing holes C on its clamping surface.

[0012] Furthermore, the thread holes A, B, and C are all used to pass through the suture thread.

[0013] Furthermore, the corners of the threading holes A, B, and C are all rounded.

[0014] This invention provides a metal artificial heart valve stent, which has the following beneficial effects: In this invention, the combined design of the tubular external stent and the tubular internal stent allows the artificial heart valve to be placed inside the tubular external stent and then the tubular internal stent to be placed inside the artificial heart valve when fixing the artificial heart valve to the tubular external stent and the tubular internal stent. Then, the artificial heart valve is fixed between the tubular external stent and the tubular internal stent by sutures, so that the inside of the artificial heart valve is effectively reinforced and supported, thereby significantly improving the stability of the artificial heart valve.

[0015] Furthermore, when fixing the artificial heart valve between the tubular external stent and the tubular internal stent, the sutures are no longer fixed to the outside of the stent's inclined rod, but pass through suture holes A and B. This prevents the sutures from slipping on the tubular external stent and the tubular internal stent, thus effectively improving the stability of the connection between the artificial heart valve and the tubular external stent and the tubular internal stent.

[0016] Furthermore, by using metal clamps, when fixing the outer part of the upper leaflet of the artificial heart valve, the outer part of the upper leaflet of the artificial heart valve is first clamped into the three metal clamps. After clamping, the suture is passed through the suture hole C on the metal clamp and the outer part of the upper leaflet of the artificial heart valve. Finally, the outer part of the upper leaflet of the artificial heart valve is fixed to the metal clamp with the help of the suture. At this time, the suture stress is concentrated on the metal clamp and no longer acts on the outer part of the upper leaflet of the artificial heart valve, thereby effectively avoiding leaflet tearing damage and significantly extending the overall service life of the artificial heart valve. Attached Figure Description

[0017] To more clearly illustrate the technical solution of the present invention, the accompanying drawings of the present invention will be briefly described below.

[0018] In the attached diagram: Figure 1 A three-dimensional structural schematic diagram of this application is shown; Figure 2 A structural schematic diagram of this application is shown from the bottom view; Figure 3 A schematic diagram of the tubular external support, tubular internal support, and metal clamping component of this application is shown. Figure 4 This application shows Figure 3 A magnified structural diagram of part A in the middle; Figure 5 A schematic diagram of the tubular external support and arched reinforcing frame of this application is shown; Figure 6 A schematic diagram of the tubular internal support and the through hole B of this application is shown; Figure 7 A schematic diagram of the structure of the metal clamp and the wire hole C of this application is shown; Figure 8 A schematic diagram of the suture, artificial heart valve, and metal clamp of this application is shown.

[0019] List of reference numerals 1. Tubular external support; 101. Arched reinforcing frame; 102. Threading hole A; 2. Tubular internal support; 201. Threading hole B; 3. Sutures; 4. Artificial heart valves; 5. Metal clamping parts; 501. Wire hole C. Detailed Implementation

[0020] Example 1: Please refer to Figures 1 to 8 : This invention proposes a metal artificial heart valve stent, comprising: a tubular external stent 1, a tubular internal stent 2, a suture 3, and an artificial heart valve 4. The tubular external stent 1 contains the tubular internal stent 2, and the artificial heart valve 4 is disposed between the inside of the tubular external stent 1 and the outside of the tubular internal stent 2. The artificial heart valve 4 is fixedly connected between the tubular external stent 1 and the tubular internal stent 2 by the suture 3. By adopting the above technical solution, when fixing the artificial heart valve 4 to the tubular external stent 1 and the tubular internal stent 2, the artificial heart valve 4 can be placed inside the tubular external stent 1, and then the tubular internal stent 2 can be placed inside the artificial heart valve 4. Then, the artificial heart valve 4 can be fixed between the tubular external stent 1 and the tubular internal stent 2 by suture 3, so that the artificial heart valve 4 is effectively reinforced and supported, thereby effectively improving the stability of the artificial heart valve 4.

[0021] Both the tubular external stent 1 and the tubular internal stent 2 are integrally formed hollow mesh structures of nickel-titanium alloy superelastic metal, which gives both the tubular external stent 1 and the tubular internal stent 2 excellent self-expansion deformation performance, biocompatibility and corrosion resistance. They can be adapted to interventional minimally invasive implantation methods, have a small volume after compression, are easy to transport, and can accurately rebound to fit the valve annulus after release.

[0022] The tubular external support 1 has arched reinforcing frames 101 arranged in a ring array at both the upper and lower ends. The arched reinforcing frames 101 and the tubular external support 1 are integrally formed, which improves the strength of the upper and lower ends of the tubular external support 1.

[0023] The tubular outer support 1 has uniformly spaced wire holes A102; the tubular inner support 2 has uniformly spaced wire holes B201. By adopting the above technical solution, when the artificial heart valve 4 is fixed between the tubular external stent 1 and the tubular internal stent 2, the suture 3 is no longer fixed outside the inclined rod of the stent, but passes through the suture hole A102 and the suture hole B201, so that the suture 3 will not slip on the tubular external stent 1 and the tubular internal stent 2, thus effectively improving the firmness of the connection between the artificial heart valve 4 and the tubular external stent 1 and the tubular internal stent 2.

[0024] Example 2, based on Example 1, such as Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, the upper part of the tubular external stent 1 is fixedly connected with three metal clamping pieces 5 in a ring array. The three metal clamping pieces 5 are clamped on the outer side of the upper leaflet of the artificial heart valve 4. The outer side of the upper leaflet of the artificial heart valve 4 is fixedly connected to the metal clamping pieces 5 through sutures 3. The clamping surface of the metal clamping pieces 5 is provided with thread holes C501 in a uniform pattern. By adopting the above technical solution, when fixing the outer part of the upper leaflet of the artificial heart valve 4, the outer part of the upper leaflet of the artificial heart valve 4 can be clamped into the three metal clamps 5. After clamping, the suture 3 is passed through the suture hole C501 opened on the metal clamps 5 and the outer part of the upper leaflet of the artificial heart valve 4. Finally, the outer part of the upper leaflet of the artificial heart valve 4 is fixed to the metal clamps 5 with the help of the suture 3, so that the suture stress is concentrated on the metal clamps 5 and no longer acts on the outer part of the upper leaflet of the artificial heart valve 4. Therefore, leaflet tearing damage is effectively avoided, thereby extending the overall service life of the artificial heart valve 4.

[0025] Thread holes A102, B201 and C501 are all used to pass through the suture 3.

[0026] The corners of thread holes A102, B201 and C501 are all rounded, which makes the suture 3 pass through the inside of thread holes A102, B201 and C501 more smoothly, and avoids damage to the suture 3 caused by the corners, thus improving the suture strength of the suture 3.

[0027] The working principle of this invention is as follows: When fixing the artificial heart valve 4 to the tubular external stent 1 and the tubular internal stent 2, the artificial heart valve 4 is first placed inside the tubular external stent 1, and then the tubular internal stent 2 is placed inside the artificial heart valve 4. Then, the suture 3 is pulled through the suture hole A102, the artificial heart valve 4 and the suture hole B201 by the suture 3, and the artificial heart valve 4 is fixed between the tubular external stent 1 and the tubular internal stent 2, so that the interior of the artificial heart valve 4 is effectively reinforced and supported, thereby effectively improving the stability of the artificial heart valve 4. At the same time, when fixing the artificial heart valve 4 to the tubular external stent 1 and the tubular internal stent 2, since the suture 3 is no longer fixed outside the inclined rod of the stent, but passes through the suture hole A102 and the suture hole B201, the suture 3 will not slip on the tubular external stent 1 and the tubular internal stent 2, thereby effectively improving the firmness of the connection between the artificial heart valve 4 and the tubular external stent 1 and the tubular internal stent 2.

[0028] After the artificial heart valve 4 is fixed between the tubular external stent 1 and the tubular internal stent 2, the outer side of the upper leaflet of the artificial heart valve 4 is clamped into the three metal clamps 5. After clamping, the suture 3 is passed through the suture hole C501 on the metal clamp 5 and the outer side of the upper leaflet of the artificial heart valve 4. Finally, the outer side of the upper leaflet of the artificial heart valve 4 is fixed to the metal clamp 5 through the suture 3. At this time, the suture stress is concentrated on the metal clamp 5 and no longer concentrated on the outer side of the upper leaflet of the artificial heart valve 4, thus making it less likely to cause leaflet tearing damage, thereby significantly improving the overall service life of the artificial heart valve 4.

Claims

1. A metallic artificial heart valve stent, comprising: A tubular external stent (1), a tubular internal stent (2), a suture (3), and an artificial heart valve (4) are characterized in that a tubular internal stent (2) is disposed inside the tubular external stent (1), and an artificial heart valve (4) is disposed between the inside of the tubular external stent (1) and the outside of the tubular internal stent (2); the artificial heart valve (4) is fixedly connected between the tubular external stent (1) and the tubular internal stent (2) by the suture (3).

2. The metal artificial heart valve stent according to claim 1, characterized in that: Both the tubular external support (1) and the tubular internal support (2) are hollow mesh structures integrally formed from nickel-titanium alloy superelastic metal.

3. The metal artificial heart valve stent according to claim 1, characterized in that: The tubular external support (1) has arched reinforcing frames (101) arranged in a ring array at both the upper and lower ends. The arched reinforcing frames (101) and the tubular external support (1) are integrally formed.

4. The metal artificial heart valve stent according to claim 1, characterized in that: The tubular external support (1) has uniformly spaced thread holes A (102).

5. A metal artificial heart valve stent according to claim 4, characterized in that: The tubular inner support (2) has uniformly spaced thread holes B (201).

6. A metal artificial heart valve stent according to claim 5, characterized in that: The upper part of the tubular external stent (1) is fixedly connected with three metal clamps (5) in a ring array. The three metal clamps (5) are clamped on the outer side of the upper leaflet of the artificial heart valve (4). The outer side of the upper leaflet of the artificial heart valve (4) is fixedly connected to the metal clamps (5) by sutures (3).

7. A metal artificial heart valve stent according to claim 6, characterized in that: The metal clamping member (5) has wire holes C (501) evenly distributed on its clamping surface.

8. A metal artificial heart valve stent according to claim 7, characterized in that: The thread holes A (102), B (201) and C (501) are all used to pass through the suture (3).

9. A metal artificial heart valve stent according to claim 7, characterized in that: The corners of the threading holes A (102), B (201) and C (501) are all rounded.

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