High-compliance embolism protector and manufacturing method of filter screen of high-compliance embolism protector

Abstract

The high-compliance embolism protector comprises a filter screen and a guide wire which are connected together, and the filter screen is a high-compliance filter screen and is formed by winding wovenwires with consistent orientation around an independent supporting structure woven dense net. And the embolism protector is restrained and then is arranged in a sheathing canal. During an operation, the sheathing canal is inserted into a blood vessel of a human body and pushed to the downstream of an operation part, and then the guide wire is pushed to push the filter screen out of the sheathing canal. Due to the shape memorability of the braided wires and the annular supporting structure, the filter screen is automatically opened to restore to the original shape and is close to the inner wallof a blood vessel, and head-on blood flow is filtered. According to the embolism protector with high compliance, due to high compliance, the embolism protector can be placed into a sheathing canal with a smaller diameter after being restrained, the sheathing canal can conveniently pass through an artery stenosis part, and the possibility that the sheathing canal damages the inner wall of a bloodvessel is reduced. Meanwhile, the filter screen made of the shape memory material comprises the annular supporting material, can better adapt to the shape of the local inner wall of a blood vessel, and is higher in adherence and better in thrombus leakage prevention effect.

Description

technical field [0001] The invention relates to the technical field of anti-embolism protection devices, in particular to a high-compliance embolism protector and a manufacturing method thereof. Background technique [0002] Brain cells have a high demand for oxygen supply. The blood supply to the human brain is mainly supplied by four arteries, including a basilar artery synthesized by two vertebral arteries, and two internal carotid arteries, which are injected together and redistributed through a Willis circle. Tissues supply blood, so when one supplying artery is blocked, other arteries can have a certain amount of compensatory blood supplementation. However, when the collateral circulation cannot or is not enough to compensate, the brain tissue supplied by the blocked artery will undergo irreversible ischemic necrosis, that is, cerebral embolism occurs, resulting in the loss of some functions of the human body, which can be fatal in severe cases. [0003] Specifically,...

AI Technical Summary

Problems solved by technology

[0007] However, the supporting delivery sheath required by the existing filter-type cerebral embolism protection device has a specification of 3F-4F, that is, the inner diameter exceeds 1 mm, and the outer diameter is thicker, which is not conducive to passing through the arterial stenosis. more damage

[0008] Moreover, in the existing cerebral embolism protection device with a filter mesh structure, the opening is uniformly shaped and produced by weaving mesh, and its support is low. easy to miss emboli

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