Stent with local dense net in blood vessel

Abstract

The invention relates to a stent with a local dense net in the blood vessel, which belongs to the technical field of medical devices implantable into the human body. The invention mainly comprises an expandable compression stent and is characterized in that the expandable compression stent is provided with a dense net type stent area that can block or slow up blood passage after expansion, and the dense net type stent area can be divided into a 1-type local dense net self-expandable stent and 2-type local dense net balloon expandable stent. The invention has the positive effects of good embolism effect, simple structure, convenient operation, time saving, safety, compatibility with both the thick and the thin blood vessels, and wide application scope; the stent overcomes the shortage in the prior art; after the stent implantation and the occlusion of the aneurysm neck, the local dense net can block or slow up blood flow into the aneurysm cavity, and then thrombus is formed in the aneurysm cavity, thereby thoroughly embolizing aneurysm without using other embolism materials; non-dense parts do not affect the blood transportation of branch vessels beside the aneurysm neck; the stent greatly reduces operation cost, and alleviates patients' wound and pain at the same time.

Description

technical field [0001] The invention belongs to the technical field of medical devices implanted into human bodies. Background technique [0002] Interventional treatment of wide-necked aneurysms is a difficult problem in contemporary surgery. There are several existing surgical methods: 1. stent-assisted embolization of the aneurysm. After the stent is implanted in the parent vessel, the mesh of the stent is searched for with a guide wire, and the embolization of the aneurysm is performed through the mesh of the stent, and the mesh of the stent is searched for. operation is difficult. The second is to use a balloon to protect the auxiliary embolization of the aneurysm, which is cumbersome to operate, and sometimes there is still a risk of coil prolapse after the balloon is withdrawn; even for narrow-necked aneurysms, the use of coil embolization also needs to be packed one by one, which is cumbersome and expensive , and is always accompanied by the problem of understuffin...

AI Technical Summary

Problems solved by technology

There are several existing surgical methods: 1. stent-assisted embolization of the aneurysm. After the stent is implanted in the parent vessel, the mesh of the stent is searched for with a guide wire, and the embolization of the aneurysm is performed through the mesh of the stent, and the mesh of the stent is searched for. operation is difficult

The second is to use a balloon to protect the auxiliary embolization of the aneurysm, which is cumbersome to operate, and sometimes there is still a risk of coil prolapse after the balloon is withdrawn; even for narrow-necked aneurysms, the use of coil embolization also needs to be packed one by one, which is cumbersome and expensive , and always accompanied by the problem of understuffing or overstuffing

But none of the existing self-expandable stents and balloon-expandable stents can solve the above problems

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