Stent Graft

Abstract

The present invention relates to a stent graft, comprising a stent main body and a first film coated on the stent main body, at least two blocking rods are arranged on the outer wall of the stent grafting, each of the two blocking rods The ends are respectively connected with the stent main body, and at least one layer of second film is provided on each of the blocking rods, and the second film is connected with the first film to block the blood flow from the proximal end of the stent graft. The end flows out from the distal end of the stent-graft through the inside of the blocking rod; the blocking rod is folded and attached to the outer wall of the stent-graft in the delivery state, and rebounds to expand to the outer wall of the stent-graft after being released. The outer walls of the stent-graft intersect. The covered stent of the invention can solve the endoleak problem in the chimney operation, and reduces the difficulty of sheathing the covered stent.

Description

technical field [0001] The invention relates to the technical field of interventional medical devices, in particular to a covered stent. Background technique [0002] In the endoluminal treatment of the aorta, when the dissection breach is close to the branch vessels, so that the anchoring area of ​​the aortic stent graft is insufficient, the chimney technique or in situ fenestration technique is often used to isolate the lesion and The purpose of opening branch vessels. When the chimney technique is used, since the aortic stent graft passes over and covers the opening of the branch vessel, and the proximal section of the branch stent and the aortic stent are arranged in parallel in the aortic vessel, the distal section of the branch stent is separated from the branch vessel. The opening extends into the branch vessels, so that in the aortic vessel, a large gap will be formed between the aortic stent and the branch stent, so that the blood flow can flow through the gap to f...

AI Technical Summary

Problems solved by technology

When the chimney technique is used, since the aortic stent graft passes over and covers the opening of the branch vessel, and the proximal section of the branch stent and the aortic stent are arranged in parallel in the aortic vessel, the distal section of the branch stent is separated from the branch vessel. The opening extends into the branch vessels, so that in the aortic vessel, a large gap will be formed between the aortic stent and the branch stent, so that the blood flow can flow through the gap to form an endoleak, which is not conducive to the treatment of the lesion, and may even cause cause surgery to fail

[0003] Please refer to figure 1 , the proximal section of the branch stent 110 is placed in the aortic vessel 120 and arranged in parallel with the aortic stent 130, and the distal section is placed in the branch vessel 140 of the aortic vessel 120, please refer to figure 1 and figure 2 Since the aortic stent 130 and the proximal end of the branch stent 110 are arranged in parallel in the aortic vessel 120, there will be two larger gaps 150 between them, and blood will flow through these gaps 150, thereby creating an internal Leakage is not conducive to the treatment of 160 in the lesion, and it will lead to surgical failure in severe cases

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