Thrombus extraction stent, thrombus extraction device and thrombus extraction system

Abstract

The invention relates to a thrombus extraction stent, a thrombus extraction device and a thrombus extraction system. The thrombus extraction stent comprises rigid units and flexible units which are alternately connected. Each rigid unit and each flexible unit are of a tubular structure which can be compressed and expanded in the radial direction. When the same axial force is applied, the flexibleunits are easier to axially compress compared with the rigid units. When the flexible units are axially compressed, the radial sizes of the flexible units are synchronously increased; and the maximumradial size of the axially compressed flexible units can be greater than the radial size of the rigid units. The rigid units are used for supporting, a blood flow channel can be rapidly established when the stent is unfolded, and the pre-dredging function is achieved. When the flexible units are compressed in the axial direction, interval spaces surrounding the rigid units can be formed between the adjacent flexible units, thrombus located in the interval spaces are not cut by the thrombus extraction stent, the integrity of the thrombus is kept, the risk of thrombus disengagement is reduced inthe withdrawing process, the thrombus taking-out success rate is increased, and the thrombus capturing capacity is further improved.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a thrombectomy bracket, a thrombectomy device and a thrombus retrieval system. Background technique [0002] Thrombosis is the abnormal aggregation of platelets and other formed components in the blood to form blood clots. Blood clots may occur on the inner wall of the heart or on the wall of blood vessels, causing blood vessel blockage or embolism, and secondary serious physical injury. Thrombosis spreads throughout the entire cardiovascular system, affecting 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 thromb...

AI Technical Summary

Problems solved by technology

The common defect of these mainstream products is that there is residue after thrombectomy and the thrombus falls off during withdrawal, which leads to the unsatisfactory overall thrombus capture performance of the thrombus removal device.

The internal carotid artery, middle cerebral artery, vertebral artery, and basilar artery are the most common sites of nerve thrombus, and the state of acute thrombus is mostly greasy and slippery.

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