Stent graft

Abstract

The invention relates to the medical field, in particular to a stent graft. A body of the stent graft comprises a plurality of wavy supporting rings which are arrayed to form a tubular structure. At least one supporting ring is a multi-wave ring. The multi-wave ring comprises a first wave and a second wave which are connected. The stent graft has the advantages that in the endovascular repair treatment process of aortic dissection involving arch, the second wave of the multi-wave ring minimizes the gap between the aorta body stent graft and a chimney graft, the body stent graft can better wrap the chimney graft, and the endoleak occurrence rate is decreased; the first wave of the multi-wave ring makes the radial acting force of the body stent graft on the chimney graft within the fatigue strength range of the chimney graft, the pressure stress of a pipe wall can not be excessively increased, and meanwhile the chimney graft is prevented from being blocked; the small amplitude of the first wave and the large amplitude of the second wave make the stent graft fit the bend of the aortic arch.

Description

technical field [0001] The invention relates to the medical field, in particular to a stent graft. Background technique [0002] With the development of interventional technology, more and more stents are used. Problems that could only be solved by traditional surgical techniques or hybrid techniques (such as dissecting aneurysms at the aortic arch and abdominal aortic aneurysms at the visceral artery) can now be solved by releasing Aortic stent-grafts can achieve therapeutic purposes. Currently, one or more "chimney" stents, which form important branches, are typically released between the aortic stent-graft and the inner wall of the aorta in order to seal off the breach without affecting the blood supply to important branch vessels The blood flow channel of the blood vessel not only ensures that the aortic stent graft covers the arterial dissection breach, but also ensures the smooth flow of important branch blood vessels. [0003] Due to its flexible combination, conven...

AI Technical Summary

Problems solved by technology

It can be seen that, on the cross-section of the action of the aortic body stent-graft and the "chimney" stent, because the aortic body stent-graft does not wrap the "chimney" stent well, a blood leakage groove G ( gutter), will increase the risk of endoleak. With the continuous increase of endoleak, the circulation pressure can still act on the dissection false cavity, and it is difficult to form effective thrombus in the false cavity, and rupture may still occur, resulting in the failure of endovascular treatment.

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