Intravascular stent in type of supporting rib having mortise and tenon joint structure

Abstract

The invention discloses an intravascular stent in type of a supporting rib having mortise and tenon joint structure and relates to the medical treatment field of intravascular intervention. A helical support rib, with one end having a tenon and one end having a mortise, is connected with an S-shaped connecting rib. A wedged boss is designed at the tenon, a through hole is formed at the mortise, and a slide slot is formed between the tenon and the mortise. In a gripped state, the support rib is helical, and the wedged boss is fastened in the slide slot; in an expanding state, the wedged boss slides along the slide slot, the tenon enters the through hole of the mortise at the time the wedged boss slides to the tail ends of the slide slot, and the tenon continues to move circumferentially to squeeze the through hole under action of radial expanding pressure, and then enters the mortise finally to be jointed with the same completely. The tenon and the mortise of the support rib are jointed completely, the wedged boss is inserted to the through hole completely, and the support rib expands until being changed into a closed circular ring structure. Matching between the tenon and mortise joint structure and matching between the wedged boss and the through hole prevent the stent from radial expanding or contracting; thus, supporting performance of the stent is improved.

Description

technical field [0001] The invention relates to the medical field of vascular intervention. Specifically, the present invention relates to a mortise and tenon structure supporting tendon vascular stent, in which the supporting tendons of the vascular stent are designed in a helical shape with a mortise at one end and a mortise at the other end. Background technique [0002] At present, stenting, as the main way to treat vascular stenosis, is accepted by more and more doctors and patients. Vascular stent, as a tiny tube network-shaped structure, is placed into the stenotic segment of the blood vessel to expand and support the lesion. During the expansion process, the vascular stent expands the narrow lumen by squeezing and stretching the plaque on the artery wall, thereby reducing the degree of stenosis of the blood vessel and ensuring the blood flow of the blood vessel. After the expansion is completed, the vascular stent expands to the maximum displacement and undergoes p...

AI Technical Summary

Problems solved by technology

However, the improvement of materials cannot completely solve the problems of insufficient support performance such as incomplete expansion of vascular stents, radial rebound after expansion, and dog-bone effect. Research

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