Valve stent and artificial valve device

Abstract

A valve stent is provided that includes a plurality of expandable diamond meshes. Each rhombic grid is composed of four wave rods, and the valve support sequentially comprises a first part, a second part and a third part from the outflow end to the inflow end in the axial direction. The first part is provided with a truncated cone structure which is gradually shrunk towards the outflow end, the second part is provided with a truncated cone structure which is gradually shrunk towards the inflow end, and the third part is provided with a truncated cone structure which is gradually shrunk towards the outflow end. A transition area between the first part and the second part comprises a protruding part in the circumferential direction of the valve stent, the protruding part comprises a plurality of valve fixing holes, and a transition area between the second part and the third part comprises a concave part in the circumferential direction of the valve stent. The invention further provides an artificial valve device which comprises the valve support and an artificial valve. The device not only can effectively reduce perivalvular leakage and prevent thrombus, but also can improve the supporting performance of the valve stent and the accuracy of the release position.

Description

technical field [0001] The present disclosure relates to a valve support, in particular to a valve support and an artificial valve device for transcatheter aortic valve replacement. Background technique [0002] The heart valve is the core component of the heart. During the working process of the heart, the heart valve keeps opening and closing to achieve normal blood circulation. When the valve is mutated due to congenital or acquired diseases, the valve cannot be opened and closed normally. , will have a significant impact on people's health and life, and serious valve diseases will cause the heart to fail to work normally and require replacement of artificial heart valves. [0003] In order to ensure the support strength, the existing interventional artificial heart valve stent usually uses more metal materials, which makes the press-fitting diameter of the valve stent larger, and may block the coronary ostium, which is not conducive to the use of patients with thinner bl...

AI Technical Summary

Problems solved by technology

[0003] In order to ensure the support strength, the existing interventional artificial heart valve stent usually uses more metal materials, which makes the press-fit diameter of the valve stent larger, and may block the coronary ostia, which is not conducive to the use of patients with thin blood vessels.

In particular, there are more metal materials at the position where the upper part of the aortic valve contacts the ascending aorta, which makes the overall flexibility of the existing valve stent poor, which is not conducive to the bending of the valve stent along with the ascending aorta, and it is easy to increase the valve and valve annulus. malapposition of the

In addition, due to poor apposition, the friction between the axial parts of the valve stent and the ascending aorta is not uniform, and the part of the valve stent located in the ascending aorta near the coronary ostium has obvious concave and relatively few metal materials , after the valve stent is released, it is prone to displacement

Moreover, due to the long-term calcification failure of the existing interventional artificial heart valve, the longest service life of the current product does not exceed 10 years, after which the patient needs further treatment, such as re-implantation of the artificial heart valve

However, due to the structure of the existing products, it is difficult to implant a new interventional artificial heart valve (valve-in-valve) in it to maintain the normal function of the heart. Serious mutual interference between implanted prosthetic valves

Images