阅读说明：本技术 一种可植入式生物瓣 (Implantable biological valve ) 是由 李传保 陈玉国 谷兴华 徐峰 赵鑫 张希全 于 2020-03-27 设计创作，主要内容包括：本发明公开了一种可植入式生物瓣,包括：一可膨胀式支架,该支架内衬医用瓣膜。其瓣膜为四瓣膜,四瓣膜单向分流,十字对称分布。通过设计4瓣结构的生物瓣膜,在相同的血管截面面积上增加了分担反向血流的压力的瓣膜数量,从而降低了各瓣膜的受力大小。尤其是瓣膜片和瓣膜框架的结合处的应力大小。从而显著提高了生物瓣膜的使用寿命。可实施性强,显著提高了生物瓣膜的使用寿命。(The invention discloses an implantable biological valve, which comprises: an expandable stent, which is lined with a medical valve. The valve is a four-valve membrane which is divided in one direction and distributed in a cross-shaped symmetrical way. By designing the biological valve with the 4-valve structure, the number of valves for sharing the pressure of reverse blood flow is increased on the same section area of the blood vessel, so that the stress of each valve is reduced. Particularly the amount of stress at the junction of the valve membrane and the valve frame. Thereby remarkably prolonging the service life of the biological valve. The practicability is strong, and the service life of the biological valve is obviously prolonged.)

1. An implantable bioprosthetic valve comprising: an expandable stent, the stent lining a medical valve, the expandable stent characterized in that: the valve is a four-valve membrane which is divided in one direction and distributed in a cross-shaped symmetrical way.

2. The implantable bio-valve of claim 1, wherein: the valve is a biological valve.

3. The implantable bio-valve of claim 2, wherein: the valve is made of porcine pericardium, bovine pericardium or horse pericardium.

4. The implantable bio-valve of claim 1, wherein: the implantable biologic valve also includes a self-expanding stent.

5. The implantable bio-valve of claim 4, wherein: the self-expandable stent is made of shape memory materials.

6. The implantable bio-valve of claim 5, wherein: the shape memory material is nickel titanium memory alloy.

7. The implantable bio-valve of claim 4, wherein: the self-expandable stent is made of an elastic material.

8. The implantable bio-valve of claim 4, wherein: the self-expanding bracket is made of titanium steel alloy.

9. The implantable bio-valve of claim 4, wherein: the self-expanding stent is integrally carved by adopting a shape memory material tube.

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to an implantable biological valve.

Background

The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.

Various valvular diseases account for a large proportion of cardiovascular diseases, and a common solution is replacement of a prosthetic valve. Prosthetic valves fall into two broad categories depending on the material used: one type is a mechanical flap made entirely of artificial material; another type is a biologic valve made in whole or in part from biologic tissue. The mechanical valve is easy to have the problems of high thrombus rate, anticoagulation related complications, low long-term survival rate and the like.

The existing three-lobe artificial biological valve is generally designed according to the structure of the human main valve (such as an aortic valve) three-lobe. During use, when blood flows through, the flowing blood can have a certain impact effect on the valve to open the valve, and during the opening process of the valve, a certain pulling effect can be performed on the edge of the connecting structure of the valve and the bracket, such as the part circled in A, B and C in fig. 1. After blood flow, the valve closes. When the valve is closed, the backflow of blood can be prevented, and the blood flow can exert certain reverse pressure on the whole valve, and the pressure can be transmitted to the connecting position of the valve and the bracket.

Therefore, the valve can be subjected to repeated forward and reverse acting force in the working process, the biological valve is easy to fail under the repeated acting force, and particularly the parts circled in A, B and C in fig. 1 are easy to tear and damage, so that the service life of the biological valve is seriously influenced.

Disclosure of Invention

In order to solve the technical problems in the prior art, the invention aims to provide an implantable biological valve.

In order to solve the above technical problems, one or more embodiments of the present invention provide a technical solution:

an implantable biological valve, which is a four-valve membrane, wherein the four-valve membrane is divided in a one-way and distributed in a cross-shaped symmetrical way.

Compared with the prior art, the above embodiment of the invention has the following beneficial effects:

by designing the biological valve with the 4-valve structure, the number of valves for sharing the pressure of reverse blood flow is increased on the same section area of the blood vessel, so that the stress of each valve is reduced. Particularly the amount of stress at the junction of the valve membrane and the valve frame. Thereby remarkably prolonging the service life of the biological valve. The practicability is strong, and the service life of the biological valve is obviously prolonged.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

FIG. 1 is a schematic diagram of a prior art three-valve structure;

fig. 2 is a schematic side view of an implantable bio-valve according to an embodiment of the present invention;

fig. 3 is a schematic front view structure diagram of an implantable bio-valve according to an embodiment of the present invention.

Wherein, 1, self-expanding support, 2, valve.

Detailed Description

It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

An implantable biological valve, which is a four-valve membrane, wherein the four-valve membrane is divided in a one-way and distributed in a cross-shaped symmetrical way.

When the blood flow reversal pressure P is increased by the number of valves N in the same blood vessel section area S, each valve shares the pressure F of the reversed blood flow, wherein F is P S/N. When the number of valves N is increased, the pressure F of the reverse blood flow shared by each valve decreases in inverse proportion. Thereby reducing the amount of stress on each valve, particularly at the junction of the valve membrane and the valve frame. Thereby remarkably prolonging the service life of the biological valve. Meanwhile, the judgment is made based on clinical experience of a cardiovascular doctor: the value of the valve quantity N cannot be infinite, too many valves can reduce the occupied area of each valve, the valve opening and closing action amplitude can be reduced, and the risk of thrombus generation in the valve can be increased clinically. And when the number of the valves is 4, the risk of thrombus is not increased, and the service life of the biological valve can be obviously prolonged.

In some embodiments, the valve is a biological valve.

Further, the valve is made of porcine pericardium, bovine pericardium or equine pericardium.

In some embodiments, the implantable biologic valve further comprises a self-expanding stent.

Furthermore, the self-expandable stent is made of shape memory materials or elastic materials.

Furthermore, the self-expandable stent is made of nickel-titanium memory alloy or titanium steel alloy.

Still further, the self-expandable stent is integrally carved by a shape memory material tube.