Stent-graft, stent-graft system, and method of use

Abstract

The invention provides a covered stent, a covered stent system and a use method thereof. The covered stent is designed by comprising a main body, at least a first collateral branch which is embedded in the main body and is tangent with the inner wall of the main body, at least a second collateral branch which is arranged on the outer side of the main body is integrated with the main body, and at least a third collateral branch which is detachable. The covered stent has the following beneficial effects: 1) the design that the second collateral branch is integrated with the main body and on end of the third collateral branch is inserted into the first collateral branch reduces risks of internal leakage; 2) after a first part is sent into a vascular diseased region, firstly, the second collateral branch on which a branch sheath is sleeved is pulled into a first branch vessel of the vascular diseased region, and then the main body is released, at the time, the second collateral branch plays a role of positioning, so as to reduce risks of movement of the covered stent; 3) since the third collateral branch is detachable, the main body and the third collateral branch can be respectively made according to requirements, and a problem of difficult stock-up is solved.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a stent graft, a stent graft system and a method for using the same. Background technique [0002] The application of covered stent grafts in the treatment of aortic diseases is a major progress in aortic surgery in recent years. Its indications include aortic dissection, aortic true aneurysm, aortic pseudoaneurysm, and aortic penetrating ulcer. Due to the use of covered stents in the treatment of aortic diseases, surgical mortality and postoperative complications are greatly reduced, surgical trauma is reduced, and patients recover faster. The working mechanism of the stent-graft is to send the stent-graft into the lesion through a special conveyor and then open it to isolate the tumor from the blood, eliminating the risk of death caused by aneurysm rupture and bleeding, or the tumor’s impact on surrounding tissues and organs. oppression. Now there are mature products ...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a stent graft, a stent graft system and a method of use thereof, which mainly solve the problem of endoleakage in the process of implanting the stent graft in the prior art; secondly, solve the problem of using the stent graft in the prior art When the side branch of the covered stent graft is implanted into the blood vessel, it will be pulled to the main body, causing the main body to shift, and eventually lead to the failure of the release of the stent; again, to solve the problem of difficulty in stocking the existing covered stent

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