Branch-type coated stent graft and branch-type coated stent graft system

Abstract

The invention provides a coated stent graft for the abdominal aorta and a coated stent graft system for the abdominal aorta. The coated stent graft for the abdominal aorta comprises a stent main-bodyand a coating; the stent main-body comprises a plurality of sequentially connected stent loops; and the stent main-body is coated with the coating. From the near-end to the far-end, the branch-type coated stent graft sequentially comprises an upper main-body section, a windowed section and a lower main-body section; at least one first-branch window is arranged on the windowed section; each of thefirst-branch window comprises a stent frame; each of the stent frame is encircled by two adjacent complete stent rings; openings are arranged on the coating with which the stent frames are coated, thereby allowing communicating with branch vessels; and the coating sunks, within the range of the stent frames, toward the interior of the stent. The coated stent graft for the abdominal aorta and the coated stent graft system for the abdominal aorta provided by the invention can be used for interventional treatment of perirenal abdominal aortic aneurysm with short neck; moreover, the coated stent graft for the abdominal aorta and the coated stent graft system for the abdominal aorta show excellent anchorage stability.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a branched stent graft and a branched stent graft system. Background technique [0002] Abdominal aortic aneurysm is one of the deadliest and most difficult to treat vascular surgical diseases. Traditional surgical treatment is difficult and traumatic. Therefore, endovascular interventional treatment using abdominal aortic stent graft has been widely used in clinical treatment in recent years. In interventional therapy, the abdominal aortic stent graft is delivered to the abdominal aortic lesion through the femoral artery incision through the delivery system to protect the diseased blood vessel and repair the abdominal aortic lesion. [0003] At present, there are various types of abdominal aortic stent-grafts used in the interventional treatment of abdominal aortic aneurysms in the market, each product has its own characteristics, and the scope of indications is also di...

AI Technical Summary

Problems solved by technology

However, among the branched stents in these studies, some of the main stents did not leave space for the renal artery stent near the kidneys, which resulted in the risk of the renal artery stent being squeezed; The reserved position of the branch bracket is designed in a waisted form, and the waisted part has no anchoring function

That is, the disadvantage of the latter is that the anchoring area of ​​the multi-branched abdominal aortic stent-graft cannot be overlapped with the reserved position of the double-kidney branch stent, thereby shortening the anchoring area, resulting in unstable anchoring of the abdominal aortic stent-graft. Or in order to increase the anchoring effect of the abdominal aortic stent-graft, extend its anchoring area, and anchor the proximal end of the abdominal aortic stent-graft mainly on the celiac trunk vessel, thus increasing the structural complexity and surgical difficulty of the stent , and easily affect the celiac artery

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