Valve stent and prosthetic heart valve

Abstract

The invention provides a valve stent, which comprises a stent main body arranged in a grid shape, at least a grabbing lug connected with the stent main body and a flange connected with the stent mainbody. According to the invention, the outer diameter D of the flange is larger than the diameter d of the connecting position of the flange and the stent main body, so that the lower horizontal planeof the flange is tightly attached to a heart native valve ring and valve leaflets, the edge upwarping end surface is tightly attached to the inner wall of left atrium, the upper limiting and sealing effects are achieved, and the valve stent is prevented from sliding out towards the left ventricle end; when the valve stent is compressed into a sheath, the grabbing lug is embedded into the stent main body grids connected with the grabbing lugs, so that the stent thickness of the valve stent after being pressed, held and reduced is reduced, and the valve stent can intervene into a human body through a femoral vein path so as to reduce the diameter of a conveyor catheter and reduce the conveying difficulty and the damage to blood vessels; and the grabbing lug simultaneously grabs native valveleaflet and hooks chordae tendineae to form lower limiting, so that the valve stent is prevented from being disengaged towards the left atrium end due to external force such as blood flow scouring, heart extrusion and the like.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a valve support and a prosthetic heart valve. Background technique [0002] With the development of social economy and the aggravation of population aging, senile valvular disease and valvular disease caused by coronary heart disease and myocardial infarction are becoming more and more common. Studies have shown that more than 13.3% of the elderly over the age of 75 suffer from different degrees of valvular heart disease. Heart valve disease has gradually become one of the important reasons that threaten human health. [0003] Mitral valve disease is a relatively common heart valve disease in clinical practice. The human heart is divided into four chambers: the left atrium, the left ventricle, the right atrium, and the right ventricle. The two atria are connected to the two ventricles, and the two ventricles are connected to the two great arteries. The mitral valve gro...

AI Technical Summary

Problems solved by technology

[0009] In view of the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a valve support and a prosthetic heart valve to solve the adverse postoperative effects of the existing artificial valve support such as left ventricular outflow tract obstruction caused by excessive subvalvular height, Due to the large leaflet area, the fatigue resistance of the stent is poor, and the difficulty of delivery due to the large overall size of the stent and the damage to the left ventricle of the blood vessel, etc.

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