Cerebral aneurysm intracavity blood vessel rebuilding device

Abstract

The invention discloses a cerebral aneurysm intracavity blood vessel rebuilding device which comprises a bare metal stent and a tectorial membrane. The bare metal stent comprises a near supporting end, a far supporting end and a middle part, the near supporting end and the far supporting end are located at the two ends of the bare metal stent and used for supporting a aneurysm-carried cerebral artery blood vessel wall, the length of the middle part is slightly larger than the width of a cerebral aneurysm neck, and the middle part is arranged between the two supporting ends. The radial size of the middle part is smaller than that of the two supporting ends, and a blood supply cavity is formed between the middle part and the aneurysm-carried cerebral artery blood vessel wall. The tectorial membrane covers the near supporting end and part of the middle part so as to isolate the cerebral aneurysm from receiving the forward blood flowing, large in vector, of an aneurysm-carried cerebral artery and allow the far supporting end without the tectorial membrane to provide backward blood flow, small in vector, from the far end of the aneurysm-carried cerebral artery. The cerebral aneurysm intracavity blood vessel rebuilding device solves the problems that according to very large and huge cerebral aneurysm stent-assisted coil embolization, the aneurysmal obliteration rate is low and the recurrence rate is high, side branch and perforating branch blood supply is ensured, the cerebral aneurysm rupture is effectively prevented, and the space occupying effect of the cerebral aneurysm is reduced.

Description

technical field [0001] The invention relates to the technical field of endovascular interventional therapy, in particular to an intravascular reconstruction device for cerebral aneurysms. Background technique [0002] Cerebral aneurysm is a common cerebrovascular disease. Cerebral aneurysm refers to a tumor-like protrusion of the arterial wall caused by the local abnormal expansion of the lumen of the cerebral artery. It is shaped like a balloon and has an extremely thin wall. Once ruptured, it can cause intracranial hemorrhage, which is life-threatening in an instant. The mortality rate of cerebral aneurysm rupture is extremely high, the mortality rate of the first rupture is as high as 20% to 40%; the mortality rate of the second rupture is even higher, which is 75%. Therefore, in order to prevent cerebral aneurysm rupture and reduce mortality, the key is to isolate the connection between cerebral aneurysm and systemic circulation. At present, the methods that can be ado...

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a cerebral aneurysm intracavitary vascular reconstruction device, which solves the perforator and side branch in the coverage area of ​​the interventional device designed for very large and huge cerebral aneurysms in the background technology on the premise of maintaining the curative effect Clogged arteries that cause insufficient blood supply to them

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