Thrombus fetching device with multi-spiral structure

Abstract

The invention relates to a thrombus fetching device with a multi-spiral structure. The thrombus fetching device comprises a first driving part, a second driving part, an inner catheter, an outer catheter, a near-end marking ring, a far-end marking ring, a guide sleeve, and a spiral guide wire. The thrombus fetching device has the advantages that the structure of a spring stent is similar to the structure of a self-expanding stent; when the spring stent is released, compared with the existing self-expanding stent, the wall attaching property is better; when the spring stent is released, the structure in contact with the inner wall of a blood vessel is a round and smooth spiral guide wire, so that compared with the existing self-expanding stent, the injury to the blood vessel is less, and the pain of a patient is furthest reduced; the spring stent can be completely released in the blood vessel, so that when the spring stent is retracted, the spring stent can thoroughly fetch the thrombus, and the spiral guide wire of the spring stent can be spirally retracted and closed, thereby furthest preventing the falling of thrombus spots; after the spring stent is released from the guide sleeve, the spring stent can be quickly and naturally expanded to fill the inner wall of the blood vessel, the process is equivalent to performance of one-time stent-assisted angioplasty, the blood flow can be instantly restored, and the injury to the inner membrane of the blood vessel is avoided.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a thrombus retrieval device with a multi-helical structure. Background technique [0002] Thrombosis is due to the existence of certain incentives, some components in the blood abnormally form blood clots in the circulation, or form blood deposits on the inner wall of the heart or blood vessel walls, resulting in blood embolism. Thrombosis occurs throughout the tissues and organs throughout the body, not limited to myocardial infarction, deep vein thrombosis, or cerebrovascular thrombosis. Thrombosis can occur in blood vessels anywhere in the body. The incidence of venous thrombosis is higher than that of arterial thrombosis, the ratio of the two can reach 4:1, venous thrombosis accounts for 40% to 60% of the thrombus mechanism, the incidence of obstructive coronary thrombosis is 15% to 95%, and 90% of thrombus with Have atherosclerotic plaque. Thrombosis causes vascula...

AI Technical Summary

Problems solved by technology

At present, thrombectomy stents are mostly used for mechanical thrombectomy on the market. Most of the thrombectomy stents have a single-layer structure, which is close to or attached to the vessel wall for thrombectomy, and has a weak ability to fix the internal thrombus.

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