Partially covered stent used for treating bifurcation lesion coronary perforation and provided with biological absorption film

Abstract

The invention relates to a partially covered stent used for treating bifurcation lesion coronary perforation and provided with a biological absorption film. The partially covered stent comprises a stent body composed of a tubular inner layer stent and a tubular outer layer stent, wherein the tubular inner layer stent and the tubular outer layer have identical length concentric line engraved nettedstructures, a tubular covering film is clamped between the inner layer stent and the outer layer stent, and the partially covered stent is characterized in that one end of the covering film is flushwith the stent body, and the length of the covering film accounts for 30-50% that of the stent body; the covering film is the biological absorption film; the biological absorption film is a poly-DL-lactic acid film. The partially covered stent has the advantages of being capable of covering a blood vessel perforation part to form a complete blood flow channel, effectively preventing closing and plugging of side branches, meanwhile easily realizing endothelialization in a stent body, and effectively reducing forming of thrombi.

Description

technical field [0001] The invention relates to the field of medical interventional treatment equipment, in particular to a partially covered stent with a bioabsorbable film used for treating coronary artery perforation in bifurcation lesions. Background technique [0002] Coronary artery perforation, referred to as coronary perforation is a rare but very dangerous complication in percutaneous coronary intervention. After coronary perforation, the incidence of acute cardiac tamponade in patients is 17%-24%, and the rate of emergency surgery is 24%. %-36%, the mortality rate can reach 10% or higher. Current measures to deal with coronary perforation include: intravenous administration of protamine to neutralize heparin, intermittent balloon filling and closure at the perforation site, discontinuation of platelet glycoprotein IIb / IIIa receptor antagonists, embolization (coils, gelatin sponge, autologous Fat, thrombin, etc.), stent graft implantation and surgical operations. ...

AI Technical Summary

Problems solved by technology

Because the membrane of the existing covered stent covers the length of the entire stent body, when the covered stent is used to treat coronary perforation at the bifurcation lesion, it is difficult to avoid blocking the side branch vessels. Side branches will have serious consequences

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