A kind of artificial valve prosthesis with fixer

Abstract

The present application relates to an artificial valve prosthesis with a fixing part, comprising a stent body having a channel for blood circulation and at least one fixing part, the fixing part is connected to the stent body, and the fixing part includes a lower extension section and a An upper extension section, one end of the lower extension section is connected to the stent body as a fixed end, and the other end of the lower extension section extends proximally along the axial direction of the stent body, and turns back after passing through the bending area. The direction extends to the distal end and is connected with the upper extension section, the upper extension section is located outside the lower extension section, a leaflet accommodation cavity is formed between the lower extension section and the upper extension section, and the fixed The component is also configured with a stacking device, and when the fixing component is completely released, the native valve leaflets are stacked in the valve leaflet accommodation cavity. The clamping force of the fixing part of the artificial valve prosthesis is not affected by the space between the bracket body and the fixing part, which greatly reduces the influence of the bracket body on the outflow of blood after the bracket body is released.

Description

Technical field: [0001] The invention belongs to the field of medical equipment, and in particular relates to an artificial valve prosthesis with a fixing part. [0002] technical background: [0003] The human heart has four chambers and four valves, the mitral valve, tricuspid valve, aortic valve and pulmonary valve. Among them, the mitral valve is located between the left atrium and the left ventricle, and is composed of five parts: leaflets, valve ring, papillary muscles, chordae and junction. The mitral valve acts like a one-way valve. When the heart is diastolic, the mitral valve opens to allow blood to flow from the left atrium into the left ventricle. When the heart is in systole, the mitral valve closes to prevent blood from flowing from the left ventricle of the heart to the left ventricle. Left atrial regurgitation. [0004] According to the latest epidemiological survey data of Western developed countries such as the United States, mitral valve insufficiency (al...

AI Technical Summary

Problems solved by technology

The problem with the said patent is that even if the natural mitral valve annulus can be well anastomosed and coapted, contacting the mitral valve annulus with the radial expansion of the stent mesh will still cause compression on the surrounding tissues of the mitral valve annulus

At the same time, it can be seen from the accompanying drawings of the embodiments of the patent that the diameter of the valve prosthesis is the diameter of the stent, and the cross-sectional area of ​​the stent is at least the area of ​​the mitral valve annulus. left ventricular outflow tract

Finally, the valve leaflets are sutured on a non-circular stent, and the fitting of the valve leaflets in the non-circular area is bound to be affected, reducing the service life of the valve

[0010] In summary, the clamping force of the fixture in the prior art depends on the size of the space between the fixture and the stent, and the clamping of the valve leaflets can only be completed through the cooperation of the stent body. The valve annulus contacts, and the success rate is low; at the same time, the delivery device must also have a larger caliber to fit into the stent body, and the artificial valve hinders the ventricular outflow tract; the existing stent body has caused damage to the heart's own tissue. Excessive compression, poor leak-proof effect

Images