Branched Femoral Stent Graft

Abstract

A branched femoral artery stent graft provided by the present invention comprises a main stent tube, a sub-stent tube and a transition tube, one end of the transition tube is connected to the end of the sub-stent tube, and the other opposite end is installed on the main stent On the outer peripheral surface of the tube, and through the outer peripheral surface of the main bracket tube to communicate with the main bracket tube, the axis of the main bracket tube intersects with the axis of the sub-stent tube to form an included angle α less than or equal to 90°, the transition tube An extension zone is provided on the side away from the angle α, and the extension zone is used to stretch or shrink along the axis of the sub-stent tube when the angle of the angle α changes. The branched femoral artery covered stent provided by the present invention ensures the smooth blood flow of the branched blood vessels through the branched stent tube, which is convenient for improving safety.

Description

technical field [0001] The invention relates to the field of covered stents, in particular to a branched femoral artery covered stent. Background technique [0002] With the sharp increase in the incidence of hypertension, the incidence of arterial-related diseases has increased significantly, and is expected to increase at a rate of more than 40% in the next 5 to 7 years. Among them, acute Stanford type A aortic dissection (acute aortic dissection type A, referred to as AADA) is the most common and dangerous aortic emergency in the field of cardiovascular surgery. If left untreated, the mortality rate of AADA one week after onset is as high as 50-91%. If only conservative medical treatment is received, the 24-hour mortality rate can reach 20%, and the 48-hour mortality rate can reach 30%. Therefore, once AADA is diagnosed, emergency surgical intervention is necessary if there are no surgical contraindications. However, even under modern medical conditions, the perioperati...

AI Technical Summary

Problems solved by technology

However, when thoracic aortic aneurysm or aortic dissection involves the aortic arch at the opening of the brachiocephalic trunk, left common carotid artery, and left subclavian artery, the covered stents currently on the market have no branches, and will be sealed to varying degrees when used for treatment. Blocking branch vessels, resulting in blood flow disturbance in branch vessels, corresponding complications and even life-threatening

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