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-invasive interventional medical device product for treating aneurysm, in particular to a covered stent with support. Background technique [0002] Aneurysm is a very dangerous vascular disease clinically. Once discovered, patients with aneurysm should be treated as soon as possible. At present, the minimally invasive interventional treatment technology using the principle of intraluminal isolation has been widely used. It uses a delivery system with a relatively small diameter to deliver the compressed stent-graft with support to the location of the vascular lesion. After accurate positioning, it is released and covers the diseased blood vessel, isolating the vascular disease site and forming a new blood flow channel. When the stent-graft is used for aneurysm treatment, it is delivered to the location of the aneurysm by the corresponding delivery system and released, so that both ends of the stent-graft are supported o...

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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