Endovascular repair graft for treating aortic dissection false lumen

Abstract

The invention relates to the technical field of medical instruments, in particular to an endovascular repair graft for treating the aortic dissection false lumen. The endovascular repair graft is composed of an occluding part and a conveying device, wherein the body of the occluding part is of a cylinder structure formed by knitting wire mesh, and the body is covered with membranes, so that the occluding part forms a closed cavity. The endovascular repair graft can be stably fixed to the dissection false lumen and effectively occlude slits to cut off false lumen blood flow. Different from an existing occluder repair device which is placed in the aorta to precisely cover a slit, the occluding part is a closed stent graft and completely covers multiple or even all slits; meanwhile, as both ends, in the axial direction, of the occluding part are covered with the membranes, the occluding part is a closed cylinder, the shape and mechanical properties are strictly suitable for the false lumen, the occluding part can basically or even completely fill the false lumen, it is more difficult for blood to flow in or flow out, the false lumen blood flow is cut off, and thrombosis in the false lumen is accelerated.

Description

technical field [0001] The invention relates to the technical field of medical instruments, and relates to an endoluminal repair graft for treating aortic dissection false lumen. Background technique [0002] Aortic dissection (AD) refers to the rupture of the aortic intima due to various reasons. The long axis of the aorta expands proximally and distally, thus forming a pathological change in which the aorta has two true and false lumens. Its onset is sudden and harmful, and the torn false lumen vessel wall is weak, which may form an aneurysm or directly rupture and cause massive hemorrhage to death. Severe ischemic necrosis, causing serious complications such as myocardial infarction, cerebral infarction or even death. [0003] At present, endovascular repair of aortic dissection has been carried out, that is, the minimally invasive method of percutaneous stent implantation is adopted, and a straight-type endoluminal graft is implanted in the true lumen of the blood vess...

AI Technical Summary

Problems solved by technology

The utility model is to carry a plugging side branch on the basis of a bare stent main body. The bare stent not only plays the role of carrier, but also plays the role of shaping the true cavity. The plugging side branch is fixed at the gap of the interlayer and Effectively seal the gap, prevent blood flow from entering the false lumen, and induce thrombus organization and absorption in the false lumen. The gap cannot be fully covered, and the false cavity dissection between the gaps will still be impacted by blood flow, which cannot block the blood flow of the false cavity

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