Stent-graft and delivery system for stent-graft

Abstract

The invention discloses a covered stent for insulating blood vessels. The covered stent comprises a main body, identical-side branches, opposite-side branches and fixed devices fixed to the outer surface of the covered stent. The identical-side branches and the opposite-side branches are connected with the same end of the main body, and inner cavities of the identical-side branches and inner cavities of the opposite-side branches are communicated with an inner cavity of the main body. The main body, the identical-side branches and the opposite-side branches each comprise a stent body and a film covering the stent body, and the stent bodies wrapped by the films are connected through the films. Each stent body is of a cylindrical structure which is made of a supporting body and can retract in the radial direction. The fixed devices are used for controlling compressing and releasing of the covered stent. The covered stent can acquire enough supporting force from the blood vessels, and hurt or injury to the blood vessels due to a bare stent, barbs and the like can be avoided. Meanwhile, the invention further provides a conveying system for the covered stent so as to convey the covered stent conveniently.

Description

technical field [0001] The invention relates to the technical field of medical devices, and more specifically, to a stent-graft and a delivery system for the stent-graft. Background technique [0002] The blood flow of the abdominal aorta is fast, the pressure is high, and the end bifurcates to form the left and right iliac arteries. For the vast majority of diseases in which the abdominal aorta involves the common iliac artery, minimally invasive intervention is used to treat aortic diseases. In order to ensure the normal blood supply of both lower extremities and internal iliac arteries, bifurcated stents are generally selected when conditions permit. [0003] Because patients with abdominal aortic disease often have a limited length for the stent to land on the front end, and the radial force of the stent on the vessel wall will cause the vessel to expand or even rupture, it is difficult for the stent to obtain sufficient static friction force between the stent and the ve...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a covered stent to solve the problems in the background art that the supporting force of the stent is insufficient or that bare stents, barbs, etc. cause damage or damage to blood vessels

Images