Thrombus filter

Abstract

The invention belongs to the technical field of medical instruments, and discloses a thrombus filter which comprises a conveying structure, a filter part and a guide wire, the conveying structure comprises a first tube body and a conveying part, and the filter part has a first working state in which the filter part is unfolded and attached to the blood vessel wall and a second working state in which the filter part is contracted in the first tube body. A first opening and a second opening are formed in the two ends, along the upstream and downstream of blood flowing, of the filter part respectively, the conveying part can push the filter part to push the filter part out of the first tube body, and the filter part can restore to the first working state from the second working state; the protruding part is located on the side, away from the conveying part, of the first opening, the diameter of the protruding part is larger than that of the first opening and smaller than that of the second opening, and when the filtering part is in the first working state, the guide wire can move in the filtering part, thrombus can be effectively filtered, and meanwhile it is guaranteed that the guide wire has an enough movement range; the vascular wall is prevented from being scratched by the filter.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a thrombus filter. Background technique [0002] Ischemic stroke is an important cause of adult disability and death worldwide, and atherosclerotic carotid artery stenosis accounts for about 20%-30% of the incidence of ischemic stroke. The intervention treatment of carotid artery stenosis is Important measures to prevent ischemic stroke. The conventional means are carotid artery dissection, balloon dilatation, thrombectomy, thrombus aspiration, and carotid artery stenting for the treatment of carotid artery stenosis. However, thrombus often falls off during the operation, and the fallen thrombus will flow to the downstream of the blood vessel with the blood flow, thereby causing intracranial cerebral vascular embolism and causing ischemic stroke. That is, cerebral vascular embolism is a relatively common complication in carotid artery interventional surgery, which i...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned filter device has certain limitations, because the protrusion on the guide wire can only move inside the filter element, that is, between the guide wire and the filter element The range of mutual movement is small. During the subsequent surgical operation, the filter element is fully deployed and then anchored on the vessel wall. If the guide wire is pushed during the subsequent surgical operation, the protrusion of the guide wire may push against the filter element. This in turn dislodges the filter, scratching the vessel wall

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