Peripheral-leakage prevention stent device with covering film, processing method, skirt hem wrinkling method and cardiac valve

Abstract

The invention discloses a peripheral-leakage prevention stent device with a covering film, a processing method, a skirt hem wrinkling method and a cardiac valve. The stent device comprises a stent, and further comprises a flexible skirt hem. The skirt hem has a spreading state and a piling state, when the skirt hem is in the spreading state, the skirt hem stretches axially and surrounds the outerperiphery of the stent before releasing, and when the skirt hem is in the piling state, the skirt hem is driven by deformation generated when the stent is released and folded and piled in the axial direction of the released stent to form an annular peripheral-leakage prevention blocking part. According to the device, a peripheral-leakage prevention technology is adopted, so that the interventionalstent is more identical to the inner wall of the blood vessel, the stent is not easily displaced and is more stable, the range of applicable people is expanded, the additional risk of an operation isreduced, and complications such as peripheral leakage and thrombus are prevented and treated; better hemodynamic performance is provided, the climbing and covering function of endothelial cells of the host is enhanced, the occurrence probability of endocarditis is reduced, and normal blood supply functions of the heart and blood vessels are restored.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an artificial stent device for heart and blood vessels. Background technique [0002] Since the 1970s, artificial heart valve (Artificial Heart Valve) replacement, as an effective means of treating end-stage heart valve diseases, has saved the lives of millions of patients. Artificial heart valve replacement technology is a revolutionary breakthrough in heart valve treatment technology, with broad prospects. [0003] Perivalvular leak (PPL) is a unique serious complication after valve replacement and is one of the common reasons for reoperation. The main reasons for its occurrence are the pathological changes of the valve ring tissue (degeneration, rheumatic or senile calcification, acute infective endocarditis invading the valve ring or producing paravalvular abscess), the size of the artificial valve and the valve ring does not match, and the artificial associated wit...

AI Technical Summary

Problems solved by technology

[0012] However, the flexible film is located on one side of the stent axis before it is released, which will inevitably cause the product to be too long as a whole, which puts higher requirements on the conveying system. More importantly, in order to realize the rolling or folding of the flexible film, an additional traction mechanism must be provided. It is controlled by the operator, which increases the complexity and difficulty of the control. There are also metal parts that use the predetermined shape characteristics of the metal parts to drive the flexible membrane to roll up or fold after being released in the body, but the metal parts will undoubtedly make the stent itself more complicated. , and bring additional risks. In addition, due to the influence of the peripheral space of the stent, it is also difficult to lift the flexible membrane to the ideal position, so the effect is not ideal

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