Novel aorta inner branch type covered stent

Abstract

The invention aims at providing a novel aorta inner branch type covered stent. The novel aorta inner branch type covered stent is composed of a metal frame and a covering film. The novel aorta inner branch type covered stent comprises an anterior arch area, an arch area and a posterior arch area. Multiple inner branch stents are arranged on the big bend side of the arch area, a round open hole located in the big bend side is formed in the top of any inner branch stent, any inner branch stent can comprise an upper part and a lower part, the upper part of any inner branch stent is of a bowl-shaped structure, the diameter of the top section of the upper part is larger than that of the bottom section of the upper part, the lower part of any inner branch stent is of a cylindrical structure, andthe diameter of the cross section of the cylindrical structure of the lower part of any inner branch stent is not larger than that of the bottom section of the bowl-shaped structure of the upper partof any inner branch stent. The novel aorta inner branch type covered stent in the design has the effect that the open holes in the tops of the inner branch stents can correspond to branch arteries ofthe top end of an arch artery. The novel aorta inner branch type covered stent has the advantages that the problem of blood leakage between the aorta covered stent and branch covered stents can be effectively solved, the structures of the inner branch stents adapt to most blood vessel anatomical structures, and alignment with branch artery blood vessels is convenient.

Description

technical field [0001] The invention relates to the technical field of cardiovascular surgery, in particular to a novel aortic branch type stent graft. Background technique [0002] Aortic dissection and aortic aneurysm involving branch arteries above the aortic arch are difficult points in vascular surgery. Open surgery takes a long time, is complicated, and requires deep hypothermic circulatory arrest, which can easily lead to neurological complications such as hemorrhage and cerebral ischemia, and has a high mortality rate. For endovascular exclusion, dissections and aneurysms cannot be effectively treated if the current endoluminal devices do not occlude branch arteries without sufficient anchoring area. However, complete occlusion of the supraarchal branch arteries is unacceptable, as this can lead to impaired blood supply to the brain, resulting in ischemic stroke and even death. Therefore, the key idea to solve this problem is to occlude the branch artery to obtain ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a novel aortic branch-type stent-graft, which effectively solves the problem of blood leakage between the aortic stent-graft and the branch stent-graft by adding an internal branch stent, and at the same time through the special-shaped design of the internal branch stent, It can adapt the general-purpose stent to the needs of more patients and reduce the need for customized stents, thereby shortening the treatment cycle and reducing the economic burden on patients

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