Tectorial bracket

Abstract

The invention discloses a coated stent, comprising a stent section, a coat and a reinforcement; wherein, two ends of a metal wire are connected to form the reinforcement which is fixed on the coat. The invention is characterized in that: since the coated stent adopts the independent reinforcement, the reinforcement is separated from the stent section, avoiding the risk that in prior art the integral connection of the reinforcement and the front and end stent sections can lead to fracture; furthermore, the hindrance produced in the course of releasing and assembling the whole stent is reduced,which is helpful for the releasing and assembling of the coated stent. The invention also discloses another coated stent comprising a stent section and a coat; wherein, two ends of a metal wire are connected by laser welding to form the stent section. Since two ends of the metal wire in each stent section are not fixedly connected, prior coated stent can lead blood damage; therefore, the risk is avoided.

Description

technical field [0001] The invention relates to a micro-trauma interventional medical device product for treating aneurysms, in particular to a supported covered stent. Background technique [0002] Aneurysm is a very dangerous vascular disease clinically. Once an aneurysm is found, it should be treated accordingly as soon as possible. At present, the minimally invasive interventional therapy technology using the principle of intracavitary isolation has been widely used. It uses a set of delivery system with a small diameter to deliver the compressed stent-graft with support to the position of vascular lesions. After accurate positioning, it is released and covers the diseased blood vessel, isolating the diseased part of the blood vessel and forming a new blood flow channel. When the covered stent is used for aneurysm treatment, it is sent to the location of the aneurysm by the corresponding delivery system and released, so that the two ends of the covered stent are support...

AI Technical Summary

Problems solved by technology

[0009] Based on the prior art, the applicant adopts a mechanically tightened connection method for each stent segment in the covered stent and the two ends of the metal wire in the reinforcing rib, which may cause blood vessel damage due to weak connection. The bracket is improved to form a general inventive concept: the two ends of the wire head are connected by welding and fixing. Since the welding connection method does not have the above-mentioned internal stress concentration caused by the extrusion deformation of the material, the long-term durability of the material Fatigue performance can be well guaranteed, so the risk of wire damage to blood vessels due to weak connection is fundamentally avoided

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