A branched stent-graft and a branched stent-graft system

Abstract

The present invention provides an abdominal aortic stent-graft and an abdominal aortic stent-graft system, comprising a stent body and a membrane, the stent body includes a plurality of sequentially connected stent rings, and the membrane covers the stent On the main body; the branched stent-graft includes an upper body section, a fenestration section, and a lower main body section from the proximal end to the distal end, and the fenestration section is provided with at least one first branch window; the first branch window has a bracket frame, the stent frame is surrounded by two adjacent complete stent rings, and the covering film covered on the stent frame is provided with openings, and the openings are used to communicate with branch blood vessels, so The covering membrane within the range of the stent frame is sunken toward the inside of the stent. The abdominal aortic stent-graft and the abdominal aortic stent-graft system provided by the present invention can be used as the abdominal aortic stent-graft and the abdominal aortic stent-graft system for the interventional treatment of abdominal aortic aneurysms with a short neck neck, and can have Excellent anchoring 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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