Intracranial aneurysm blood flow guide support

Abstract

The invention relates to an intracranial aneurysm blood flow guide support. The guide support comprises a main body part and an encryption part, wherein the main body part is of a cylindrical structure which is formed by weaving stent wires manually or by a weaving machine and is provided with an overlapping part through curling and shaping, the encryption part is arranged at the overlapping partfor mesh encryption, and the overlapping part and the encryption part cover an aneurysm opening. By means of the structural design, normal blood circulation of nearby side branch blood vessels is keptwhile blood flowing into the aneurysm is blocked, and in addition, due to the fact that axial stretching and retracting are reduced when the stent is pressed and held, the release difficulty is lowered.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an intracranial aneurysm blood flow guiding stent. Background technique [0002] Intracranial aneurysm is a cerebrovascular disease with high disability rate and high fatality rate, and it is the main cause of subarachnoid hemorrhage. Intracranial aneurysms are abnormal protrusions at the weak points of intracranial blood vessels, which can be divided into cystic, fusiform and dissection according to morphology. Among them, saccular aneurysm is the most common, and it is more common in the bifurcation of aneurysm. There are two clinical methods for the treatment of intracranial aneurysms: surgical clipping and endovascular interventional therapy. Surgical operation has the advantages of low recurrence rate and low probability of complications, but the trauma is large and the recovery period is long, so it is not suitable for aneurysms in some complicated locations and p...

AI Technical Summary

Problems solved by technology

In addition, because the blood flow steering stent is mostly made of braided structure, the release shortening rate is very high, that is, when the stent is released from a thinner catheter into a thicker parent artery, the length will be significantly shortened, which is not conducive to the stent’s The bonding of the parent artery increases the difficulty of the operation and puts forward higher requirements for the technique of the operator, which is not convenient for clinical promotion

[0006] To solve the problem of promoting thrombus formation in the aneurysm while avoiding the blockage of the blood flow of the parent artery and collateral vessels by the stent, some patents have been disclosed. For example, the patent CN 205391220 U discloses a dense mesh stent with holes, and the patent CN106491174 A discloses a retrievable blood flow guiding stent, and patent CN 108261217 A discloses a non-shortening blood flow guiding stent, but patent CN 205391220 U needs to be processed according to the shape of the patient's blood vessel during application, considering the stent The processing cycle is difficult to apply clinically, and it is difficult to align the hole with the side branch vessels during the operation

Patent CN 106491174 A is a closed-loop braiding design, the radial shortening is obviously not conducive to surgical release, and the encrypted section in the middle is fully encrypted in the circumferential direction, which is not suitable for basilar aneurysms where side branch vessels are directly facing the neck of the aneurysm

Patent CN 108261217 A solves the problem of radial shortening, but the overall mesh of the stent is very dense, which will affect the blood supply of collateral vessels, and because of the closed-loop photolithographic design, the flexibility will be poor, and it is difficult to pass through the curved and complicated intracranial vessels

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