Segmented embolectomy stent

Abstract

The invention provides a segmented embolectomy stent. The shape of the segmented embolectomy stent is a tubular shape with the circumferential surface provided with a plurality of meshes formed by hollowing-out; the segmented embolectomy stent comprises a proximal end segment, a middle portion segment and a distal end segment; the proximal end segment forms a tapered opening and is connected witha push wire; the middle portion segment is formed by connecting a plurality of sub-segments end to end; at least one first X-shaped connecting portion is formed between the adjacent sub-segments, andeach X-shaped connecting segment includes two X-shaped connecting segments; and the two X-shaped connecting portions in every X-shaped connecting segment directly face each other. The design of the symmetric X-shaped connecting segment and the bilaterally symmetrical and the longitudinal symmetrical structure enable the stent to maintain the opposite segmented structure of every segment, reserve the advantages of strong thrombus capturing ability and strong blood vessel torturing ability of the segmented stent, increase the stability of the stent structure and the stability of the capturing effect, and make the stent easily operated by an operator.

Description

technical field [0001] The invention relates to an intravascular interventional medical device, in particular to a segmented thrombectomy bracket. Background technique [0002] Acute ischemic stroke is a cerebrovascular disease that endangers human health. Thrombus congestion in blood vessels leads to brain ischemia. Intravenous thrombolysis is the standard of care for acute ischemic stroke. However, when large intracranial vessels such as the M1 segment of the middle cerebral artery are occluded, the probability of recanalization through intravenous thrombolysis is very low. In recent years, the method of intravenous thrombolysis combined with endovascular intervention has been proved to be more effective in achieving effective recanalization than intravenous thrombolysis alone. Among them, an effective endovascular intervention is to release a thrombus retrieval stent at the embolization site, which can capture the thrombus and pull it back into the catheter, thereby ach...

AI Technical Summary

Problems solved by technology

However, there are few connecting parts between the segments of the stent, resulting in an unstable stent structure. When the complex anatomical structure or tortuous blood vessels are released and recovered, the stent is prone to discounts, twists, etc., which increases the difficulty of manipulating the stent. At the same time, Since the segmented structure is symmetrical in the left-right direction and asymmetrical in the vertical direction, the ability of the stent to capture thrombus in the vertical direction is different. If the lower side of the stent is mainly in contact with the thrombus after release, and the radial gap faces the vessel wall, this is impossible. The thrombus is well accommodated, which increases the instability of the thrombus removal effect

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