Intra-cerebrovascular special thrombus extraction apparatus

Abstract

The invention relates to an intra-cerebrovascular special thrombus extraction apparatus. The thrombus extraction apparatus comprises a head-end micro-guide wire, a thrombus capture net, a net ring, anet connecting wire, a proximal marker, an operating guide wire and an apparatus leading-in catheter. The head-end micro-guide wire is arranged at the foremost end of the apparatus and is connected tothe operating guide wire; the radiography net ring is the annular edge of the thrombus capture net; the thrombus capture net, by virtue of the net ring at the edge and the connecting wire, is connected to the operating guide wire; the proximal marker is arranged on the part where the net ring connecting wire and the operating guide wire are connected; the intra-cerebrovascular special thrombus extraction apparatus is supplied into the micro catheter by virtue of the apparatus leading-in catheter; the intra-cerebrovascular special thrombus extraction apparatus is arranged at a thrombus distalend by virtue of the micro-catheter; and by withdrawing the operating guide wire, a thrombus can be captured into the net and extracted out of a body. The apparatus provided by the invention is good in flexibility, strong in passing capacity, high in thrombus extraction efficiency, low in vascular wall injury and simple and rapid to operate.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a special thrombectomy device for cerebral blood vessels when acute ischemic stroke occurs. Background technique [0002] At present, stroke has become the first cause of death and disability among Chinese residents. Because of its high mortality rate and high disability rate, it causes a huge economic burden for families and society. With the positive results of five randomized controlled trials published successively in the New England Journal, it has been confirmed that endovascular mechanical thrombectomy can benefit selected patients with acute ischemic stroke. Both Chinese guidelines and American guidelines have given the highest recommendation level and evidence level for endovascular treatment suitable for patients, and the diagnosis and treatment of acute ischemic stroke has entered the 2.0 era. [0003] In the prior art, the following representative intravascu...

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Problems solved by technology

[0007] At present, thrombectomy devices represented by thrombectomy stents generally have the following deficiencies: 1. The metal of the stent can easily cause damage to the intima of the vessel, and the risk of secondary thrombosis is high; The risk of bleeding increases; 3. The efficiency of stent removal is affected by the length and diameter of the stent, and the recanalization efficiency is low for large-load thrombus, and the problem of thrombus escape cannot be solved; 4. After the stent is released, it takes 5 minutes to wait for the thrombus to fully entangle with the stent knot, inefficiency, delayed recanalization time

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