Thrombus extraction device and interventional medical system

Abstract

The invention provides a thrombus extraction device and an interventional medical system, which can improve thrombus extraction effect and thrombus extraction efficiency and do not cause damage to blood vessels. The thrombus extraction device comprises at least one thrombus extraction support, a thrombus extraction filter screen, a push-pull guide wire and a push-pull tube. The thrombus extractionfilter screen is positioned at the distal end of the thrombus extraction support; the push-pull tube is arranged in the thrombus extraction support in a penetrating manner, and is respectively connected with the proximal end of the thrombus extraction support and the proximal end of the thrombus extraction filter screen; the push-pull tube is provided with a hollow channel with two open ends; thepush-pull guide wire is movably arranged in the hollow channel in a penetrating manner; and the distal end of the push-pull guide wire extends out of the distal end of the hollow channel and is connected with the distal end of the thrombus extraction filter screen. The push-pull tube is used for coaxially and relatively moving with the push-pull guide wire, so that the proximal end of the thrombus extraction filter screen is sunken inwards or extends outwards to adjust the form of the thrombus extraction filter screen. The interventional medical system comprises the thrombus extraction deviceand a conveying catheter used for conveying the thrombus extraction device.

Description

technical field [0001] The invention belongs to the field of medical devices, and in particular relates to a thrombectomy device and an interventional medical system. Background technique [0002] In my country, acute stroke is the third leading cause of death and the first leading cause of disability. According to statistics, there are about 2 million new strokes in the country every year, of which ischemic stroke accounts for about 85% of all patients. [0003] Once acute ischemic stroke occurs, how to quickly remove the thrombus blocking the blood vessel is the key to the success of the treatment. There are two conventional treatment methods. The first is to eliminate thrombus with thrombolytic drugs; the second is to remove thrombus mechanically The device removes the thrombus. Arterial and venous thrombolysis is a routine method for the treatment of acute ischemic stroke, but this method has high requirements on the treatment time window. It is strictly required that ...

AI Technical Summary

Problems solved by technology

Furthermore, Chinese utility model patent CN107049420 discloses a support bolt removal device with three closed-loop network units: the mesh area of ​​the second closed-loop network unit located in the middle is larger than that of the first and third closed-loop network units located at the ends, Due to the small mesh design at the distal end and the proximal end, the thrombus is not easy to shift and fall off during the withdrawal process; however, the large and small mesh design of the thrombectomy device for the stent cannot solve the small thrombus during the thrombectomy process. The problem of distal vessel embolism due to escape

[0007] It can be seen that the current thrombectomy device cannot safely and effectively capture the small emboli that fall off during the thrombectomy process.

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