Heart prosthesis valve

Abstract

A heart prosthesis valve comprises a stent body, a skirt edge and a plurality of valve leaflets, and the stent body comprises a separated movable stent and a plurality of claw lugs; the separated movable stent comprises an upper-layer stent, a lower-layer stent and a traction piece; the upper-layer stent comprises an upper-layer stent wall and a plurality of straight sleeves; the lower-layer stentis movably arranged at the lower part of the upper-layer stent, and comprises a lower-layer stent wall and a plurality of straight rods, the plurality of straight sleeves are respectively and vertically arranged on the wall of the upper-layer stent; a plurality of grooves are formed in the inner wall of the straight sleeve; the lower-layer stent wall is cylindrical; the plurality of straight rodsare vertically arranged on the lower-layer stent wall corresponding to the straight sleeves, and the upper ends of the straight rods are exposed out of the end part of the lower-layer stent wall; corresponding to the grooves, a plurality of protruding buckles are arranged on the outer wall of the upper ends of the straight rods, the lower-layer stent moves in the straight sleeves through the upper ends of the straight rods to achieve change of the distance between the end of the upper-layer stent and the claw lugs, and the lower-layer stent and the upper-layer stent are fixed through connection of the buckles and the grooves.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to an artificial heart prosthesis valve. Background technique [0002] The heart is the most important organ in the body of vertebrates. Its main function is to provide pressure for blood flow and to move blood to all parts of the body. The heart consists of four chambers, the left atrium, left ventricle, right atrium, and right ventricle. Both the left and right atria and the left and right ventricles are separated and do not communicate with each other. There are valves (atrioventricular valves) between the atrium and the ventricle. These valves have the function of "one-way valve", that is, through the "opening and closing movement", blood can only flow from the atrium to the ventricle, but not back. The valve between the left atrium and left ventricle is called the mitral valve, and the valve between the right atrium and right ventricle is called the tricuspid valve. (The valve...

AI Technical Summary

Problems solved by technology

If the subvalvular height of the artificial valve stent is too high, it will affect the original heart structure and heart function, cause chordae tendon rupture, touch the papillary muscle and other heart tissue abnormalities, and at the same time easily cause left ventricular outflow tract obstruction and induce adverse postoperative effects

[0017] 3. Traditional stents are integrated stents, mostly made of laser-cut pipes or wire braided. The overall material, wall thickness, and strength of the stents are roughly the same

When the stent is inserted into the heart, except for the key parts that play a supporting role, the mechanical properties of the remaining parts are too large, which will affect the contraction of the heart and reduce the fatigue performance of the stent

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