Artificial blood vessel and covered stent connection mechanism for aortic operation

Abstract

The invention discloses an artificial blood vessel and covered stent connection mechanism for an aortic operation. The connection mechanism comprises an artificial blood vessel and a covered stent, the artificial blood vessel and the covered stent are connected into an integrated structure through an inner ring made of a hard material, the outer side of the inner ring is sleeved with a fixing ring, and the difference of the radius of the inner circle of the fixing ring and the radius of the outer circle of the inner ring is equal to or smaller than the wall thickness of the blood vessel so that the blood vessel can be clamped between the inner circle of the fixing ring and the outer circle of the inner ring, and the step of sewing or binding is omitted. Besides, connection is more stable, more reliable and quicker, bleeding complications are not likely to happen, and the risk of operations is effectively reduced.

Description

Technical field [0001] The invention belongs to the technical field of medical devices, in particular to a connection mechanism between an artificial blood vessel and a covered stent used for aortic surgery. Background technique [0002] Aortic diseases, especially Stanford type A (DeBakey type I) aortic dissection and thoracic aortic aneurysms with a wide range of lesions are a group of cardio-macrovascular emergencies that seriously threaten the lives of patients and have a high fatality rate. Acute aortic dissection has a sudden onset and serious illness, which can cause serious complications such as vascular rupture, limb ischemia, visceral ischemia or paraplegia. The 24-hour survival rate after dissection is only 40%, and the 3-month survival rate is only 10%. In recent years, with the increase in the incidence of hypertension and arteriosclerosis, the incidence of aortic dissection has increased significantly, and the incidence is as high as 5-10 / 100,000 per year. [0003] S...

AI Technical Summary

Problems solved by technology

However, during the operation, after the "elephant trunk" stent-graft is inserted into the true cavity of the descending thoracic aorta, it is fixed with the trunk of the artificial blood vessel with sutures, and the blood vessel is clamped between the inner wall of the artificial blood vessel and the stent-graft. Even in the process of suturing the stent-graft and the artificial blood vessel, complications such as bleeding complications are very easy to occur, all of which are caused by the aortic tear caused by not suturing the real dissection adventitia or improper operation. The problem is that currently there are ropes or bands used to fix the stent graft and the artificial blood vessel by tightening, but the binding force varies from person to person, it is difficult to grasp, and there are still many uncertain factors, so the risk of surgery has not been reduced

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