Bracket valve with bracket and biovalve knitted integrally and preparation method thereof

Abstract

The invention relates to a bracket valve provided with a bracket and a bioprosthetic valve which are woven into a whole. The bracket valve comprises a self-expandable braided bracket woven by elastic metal wires, and a valve leaf and an overlay film formed by animal valves. The invention is characterized in that animal valves for forming the valve leaf and the overlay film are penetrated by the braided wires form the self-expandable braided bracket to be woven in the bracket body, thus an integrated bracket valve is formed. The manufacturing method of the bracket valve comprises the steps that the bracket is braided for the first time, heat treatment for shape memory to the braided bracket is performed, the bracket after the heat treatment is disassembled along the reverse direction of the first time braiding, the disassembled bracket which is restored into the second time bracket braiding crosswise passes through the vascular wall of the animal valve, and the animal valve and the bracket are woven into a whole. The bracket valve of the invention has no stress concentration during the opening and the closing of the valve leaf, the wearing is reduced, and the servicing life is prolonged.

Description

technical field [0001] The invention relates to a substitute for human tissue, in particular to a stent valve in which a stent and a biological valve are woven together and a manufacturing method thereof. Background technique [0002] The heart is the most important organ of the human body. The heart is divided into two parts, the left and the right, and each part includes the atrium and the ventricle. The left and right atria and right and left ventricles are separated by the atrial and ventricular septum, respectively. There are four heart valves in the heart, namely the tricuspid valve, pulmonary valve, mitral valve and aortic valve. In the human blood circulation mechanism, the four heart valves play a vital role. The hypoxic blood from the systemic circulation mechanism enters the right atrium through the vena cava, and then enters the right ventricle through the tricuspid valve. The contraction of the right ventricle pushes the blood into the pulmonary circulation me...

AI Technical Summary

Problems solved by technology

[0006] The disadvantages and problems of the balloon-expandable artificial valve are: its diameter is determined by the diameter of the balloon. If the diameter of the artificial valve is not selected at the beginning, or after some physiological changes, such as natural growth, pathological vascular expansion, etc., The caliber of the natural valve may increase, but the caliber of the artificial valve cannot be increased adaptively, and the artificial valve may loosen or slip off, so only secondary balloon re-expansion can be performed

[0010] 1. There is no specific fixed position on the stent or cut stent for suturing the animal valve

[0011] 2. If the animal valve is sutured directly to the staggered points and braided wires of the stent through a series of suture points, or to the beam (strut) of the cut stent, stress concentration at the suture site during meridional compression and during leaflet opening and closing , which will lead to leaflet damage here and shorten the life span

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