Thrombectomy device and medical device

Abstract

The invention provides a thrombectomy device and a medical device.The medical device comprises the thrombectomy device, the thrombectomy device comprises a pushing shaft, a thrombectomy stent and an auxiliary mechanism, and the thrombectomy stent is a self-expanding stent and fixedly connected to the far end of the pushing shaft; and the auxiliary mechanism is partially arranged in the thrombectomy stent and is used for applying radial outward expansion force to the thrombectomy stent, so that the thrombectomy stent can perform secondary expansion in the radial direction after self-expansion. A thrombus is captured by utilizing the thrombectomy device, and if the thrombus cannot be effectively captured due to insufficient radial force of the thrombectomy stent, the auxiliary mechanism can be utilized to apply the expansionary force to the thrombectomy stent, so that the thrombectomy stent is secondarily expanded, the radial force is enhanced, and the thrombus capturing effect is improved.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a thrombectomy device and a medical device. Background technique [0002] Acute stroke is a common cerebrovascular disease, with sudden onset, rapid development, severe symptoms, high disability and fatality rates, and belongs to the acute and critical diseases of cerebrovascular diseases. Generally speaking, stroke can be divided into two types: hemorrhagic and ischemic, and the proportion of ischemic stroke can reach 70% to 80%. The pathogenesis of acute ischemic stroke is that thrombus or arteriosclerotic plaque detached from the diseased vessel wall causes acute occlusion of cerebral arteries, which in turn causes a series of physiological and pathological reactions such as inflammation and apoptosis in ischemic brain tissue. If the blood perfusion of the occluded cerebral artery is restored within a short period of time, the cell metabolism of the brain ...

AI Technical Summary

Problems solved by technology

This thrombectomy method mainly utilizes the radial extrusion and fit of the thrombus retrieval stent to capture the thrombus. When the radial force of the thrombus retrieval stent is insufficient, the effect of thrombus capture is poor. Hard massive thrombus, large cardiogenic white thrombus, or plaque thrombus with limitations beyond the treatment time window

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