Auto-expansion type tapered intravascular stent

Abstract

The invention provides an auto-expansion type tapered intravascular stent. The intravascular stent comprises multiple groups of annular supports arranged in the longitudinal direction of the intravascular stent sequentially and connectors connected between every two adjacent groups of annular supports; the annular supports and the connectors are made of shape memory materials through laser engraving, each annular support has multiple sinusoidal-wave-shaped bends in the longitudinal direction of the intravascular stent, every two adjacent groups of annular supports are distributed in a mirror symmetry manner, and the inner diameter of a ring formed by the multiple groups of annular supports is reduced from the near end to the far end of the intravascular stent sequentially; the connectors are linear. A tapered cylindrical structure of the stent can effectively improve the wall attaching performance of the stent and is more capable of reducing longitudinal deformation of the stent, restenosis and other complications.

Description

technical field [0001] The invention relates to a self-expandable vascular stent for treating tapered diseased blood vessels by percutaneous coronary intraluminal vascular stent intervention in the technical field of medical device manufacturing, in particular to a self-expandable tapered vascular stent. Background technique [0002] In recent years, various acute and chronic vascular occlusive diseases caused by coronary atherosclerotic heart disease have been recognized as one of the most serious diseases that endanger human life and health in my country and the world, and its morbidity and mortality rank among all kinds of diseases. head. At present, there are three types of treatment for cardiovascular diseases caused by vascular stenosis: drug therapy, surgery and interventional therapy. Among them, drug treatment can only play a preventive or short-term effect, and has not yet achieved a fundamental cure for cardiovascular diseases. Vascular stent, as a medical device...

AI Technical Summary

Problems solved by technology

At present, the design of the vascular stent structure mostly adopts the design with the same parameter value, that is, the same vascular stent structure, no matter the proximal end of the stent or the middle and distal ends of the stent, adopts the same shape of the annular support and the connecting body, and all supports The wave height of the body, the circumferential number of the connectors between the supports, and their length and rib width are also kept constant, which makes the whole stent present a consistent cylindrical shape when expanded, and is suitable for vessels with large differences in diameter. Severe damage to the vessel wall of the tapered vessel

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