Thrombus removing device

Abstract

The invention provides a thrombus removing device, comprising a thrombus removing bracket, a conveying system and a pushing handle. Compared with the prior art, the device makes the mesh stent adjustable according to the diameter of the blood vessel at the lesion position through the movement of the mandrel in the outer tube, and improves the matching property of the thrombectomy stent and the lesion blood vessel. At the same time, the mesh gap of reticular stent gradually narrows from proximal to distal end, and the mesh design of dense cooperation ensures that stent can be embedded into blood vessel quickly, and increases the combination and fishing capacity of stent and thrombus. Furthermore, increasing the density of the distal stent mesh can effectively prevent small thromboemboli from falling off the stent and reduce the damage to the vessel wall when the stent passes through the vessel. Finally, the distal end of the bracket is provided with a spring, which increases the flexibility of the thrombectomy bracket; Finally, the maneuverability of the bolt removing bracket is improved by the cooperation of the push handle shell and the push hand.

Description

technical field [0001] The invention belongs to the technical field of medical instruments, and in particular relates to a thrombectomy device. Background technique [0002] For the treatment of patients with ischemic stroke, the speed of thrombus clearance is a key indicator. If the rescue is not timely and the treatment is slow, it is likely to affect the prognosis. However, the thrombolytic effect of traditional chemical drugs is relatively slow, which cannot meet the speed requirements for the treatment of patients with acute ischemic stroke, which is why many stroke patients are either dead or disabled. [0003] Currently, there are two main treatment methods for intracranial thrombosis: drug thrombolysis and mechanical thrombectomy. [0004] Drug thrombolytic therapy is to inject a thrombolytic agent into the blood vessel where the lesion is located near the lesion, and form a high concentration of the thrombolytic agent in the local lesion instantaneously to acceler...

AI Technical Summary

Problems solved by technology

However, according to clinical reports, when the device is used for thrombus removal, because the distal stent is designed with an opening, the ability to capture the thrombus is weak, and the thrombus is very easy to fall off from the thrombus retriever during the recovery process, which requires repeated capture, which increases the The pain of the patient prolongs the operation time and increases the risk of distal vascular blockage. Therefore,

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