A stent for blocking arterial aneurysm of an initial part of an arterial branch and application thereof

Abstract

The invention provides a stent for blocking arterial aneurysm of an initial part of an arterial branch and application thereof. The stent comprises a stent body, a film-covered part, a proximal big opening and a distal small opening. The stent body is of a net structure; when the surface of the stent is wholly covered with covering film, a film-covered stent is formed; when the surface of a longer side of the stent is covered with a layer of covering film and the other side is not covered with covering film, a semi-film-covered stent is formed; the proximal end of the stent is a big open port and the distal end is a small open port, so that the stent is shaped as a funnel. The stent can be used for curing arterial aneurysm of an initial part of an arterial branch; the film-covered part can favorably block arterial aneurysm; the stimulation of the stent to the intimae of blood vessels is reduced; the stent can simplify operation, improve the curative effect and improve the safety of intravascular operation.

Description

technical field [0001] The invention belongs to the field of medical instruments, and in particular relates to a stent for blocking an aneurysm at the beginning of an artery branch. Background technique [0002] An aneurysm is a persistent dilated disease that occurs due to a localized weakening of the arterial wall. Cerebral aneurysm is a peripheral aneurysm, which refers to a tumor-like protrusion produced by the limited expansion of the cerebral artery wall. The protruding aneurysm wall gradually becomes thinner under the continuous impact of blood flow and eventually ruptures and bleeds. Cerebral aneurysm rupture and hemorrhage have acute onset, severe symptoms, no obvious aura, and high mortality and disability rates. The treatment of cerebral aneurysms is mainly divided into surgical clipping and endovascular interventional embolization. However, surgical clipping has large trauma, many complications, long operation and recovery time, and is not welcomed by doctors a...

AI Technical Summary

Problems solved by technology

However, for aneurysms at the origin of branch arteries, such stent-assisted treatment cannot be performed, because the branch arteries are very thin, and the origin of branch arteries is adjacent to the main artery, and the aneurysms formed are also relatively large, while conventional stents The inner diameter of the distal and proximal ends is uniform, and the expansion effect on the distal end of the branch artery is greater when implanted in the branch artery, which is easy to damage the distal end of the artery branch

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