Aortic windowing branch covered stent

Abstract

The invention discloses an aortic windowing branch covered stent and belongs to the technical field of vascular stents. The aortic windowing branch covered stent comprises a tubular skeleton made of thin filaments and a membrane covering the tubular skeleton. The proximal end of the tubular skeleton is suitable for being inserted into a window of the aortic windowing branch covered stent and communicated with the aortic windowing branch covered stent. The remote end of the tubular skeleton is suitable for being inserted into a branch blood vessel, and the proximal end is harder than the remote end. The aortic windowing branch covered stent lowers the operation difficulty of minimally invasive surgery in an aortic lumen with branch blood flow, solves the technical problem that in the surgery, internal leakage occurs easily, can adapt to fitting the tortuous branch blood vessel and effectively prevents damage to the branch blood vessel and occurrence of re-blocking and internal leakage.

Description

technical field [0001] The invention belongs to the field of vascular stents, in particular to an aortic fenestrated branch covered stent. Background technique [0002] The medial layer of normal arterial walls is rich in elastic fibers that transport blood with each heartbeat. When the middle layer is damaged, the elastic fibers are broken and replaced by fibrous scar tissue. The arterial wall loses its elasticity and cannot withstand the impact of blood flow, causing the vascular wall to bulge or the intima to tear, forming an aortic aneurysm or dissection. Aortic dissection is a dangerous aortic disease with rapid progression and high mortality. The incidence rate is about 0.3%. The untreated early mortality rate increases by 1% every hour. More than 50% of patients die within 1 week . [0003] With the development of medical technology, more and more surgical methods such as open surgery, hybrid surgery or minimally invasive surgery are used for active treatment of dan...

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Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is to overcome the high technical requirements and difficult operation of the existing stent surgery that preserves the function of the branch blood vessels, or the endoleakage of the diseased branch blood vessels cannot be avoided, so as to provide a branch that can effectively avoid the disease. Aortic fenestrated branch covered stent graft with endoleak in blood vessels and convenient operation

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