Regulating intracranial intravascular thrombus extraction device

Abstract

The invention relates to a regulating intracranial intravascular thrombus extraction device. The thrombus extraction device is provided with an adjusting guide wire, a thrombus extractor and an outer fixing sheath, wherein one end of the thrombus extractor is fixedly connected with the outer fixing sheath through a fixer, and the other end of the thrombus extractor is fixedly connected with a head-end developer through a fixer; the adjusting guide wire is also fixedly connected to the head-end developer, penetrates through the outer fixing sheath and the thrombus extractor, and is fixedly connected with a handle; a knob and a graduated scale are arranged on the handle. The thrombus extraction device has the advantages that the operability is high, the position of the thrombus extractor can be accurately regulated, the diameter of the thrombus extractor can be intuitively controlled, and thrombus can be completely captured and prevented from falling off; the thrombus can be firmly fixed, and compared with a conventional self-expanding thrombus extractor, the thrombus extraction device is higher in controllability and safety; the adjusting guide wire is controlled to accurately control the position, extension position and withdrawal position of the thrombus extractor by the knob and the graduated scale, and errors are small.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an adjustable thrombectomy device for intracranial blood vessels. Background technique [0002] At present, with the aging of the population, in the aging population, due to the aging of the cerebral blood vessels of the elderly, the blood is prone to form thrombus at the place where the inner surface of the blood vessel peels off in the vascular system. [0003] In the prior art, there are the following aspects regarding the use of instruments to remove thrombus: [0004] Chopko et al. reported in 2000 that the cerebral thrombus was successfully removed using a gooseneck endovascular capture device, and complete vascular recanalization was achieved immediately. [0005] In 2004, the Merci device was approved by the FDA for clinical use. The Merci device consists of three parts, a nickel-titanium alloy memory guide wire whose end is coiled into a loop, a microcatheter, a...

AI Technical Summary

Problems solved by technology

[0009] When the above-mentioned intracranial vascular thrombectomy device transports the thrombus retriever to the vascular lesion site, it usually retracts the thrombus retriever in the outer sheath, and when the outer sheath reaches the lesion position, then outputs the thrombus retriever in the outer sheath for deployment. In this way, the outer sheath or the thrombus retriever may shift when the thrombus retriever is output from the outer sheath, and the position of the thrombus retriever cannot be accurately controlled; even improper operation, human body shaking or other external factors may affect the control of the thrombus retriever. The thrombectomy device damages the intima of the vessel, the endothelial cells undergo denaturation, necrosis and shedding, and the collagen fibers under the endothelium are exposed. The endogenous coagulation system is activated, which promotes more thrombus formation; Relying on the self-expanding radial support force of the skeleton cannot be adjusted according to the operator's needs. Different patients have different vessel diameters. When recovering after capturing thrombus, the diameter and radial support force of the thrombus retriever cannot be adjusted according to the vessel diameter; When thrombus occurs, it is easy to miss the thrombus at the edge, and when the thrombus retrieval device is retracted, the thrombus is easy to fall off

[0010] In summary, there is an urgent need for an adjustable intracranial vascular thrombus retrieval device that can precisely adjust and control the diameter of the thrombus retriever, has strong operability, is not easy to shift, captures thrombus in a wide range, and is not easy to fall off after taking out the thrombus. Not yet reported

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