Fluid-driven intravascular plaque removal device and method

Abstract

The invention discloses a fluid-driven intravascular plaque removal device. A spindle is provided with a proximal expansible auxiliary isolating cavity, a suction hole and a distal expansible auxiliary isolating cavity, a grinding element is disposed between the proximal expansible auxiliary isolating cavity and the suction hole, the grinding element is provided with an impeller, a conveying passage is disposed at the spindle on the left of the impeller, and a right port of the conveying passage is positioned on the right of the spindle; a removal method comprises: assembling in vitro; deploying in a blood vessel, filling the proximal expansible auxiliary isolating cavity and the distal expansible auxiliary isolating cavity with media to form a local circulating chamber; driving the impeller, cutting by the grinding element, and discharging cuttings; stopping delivering material to the blood vessel, stopping the impeller and the grinding element to rotate, stopping cutting, stopping discharging of the cuttings, and releasing the media from the proximal expansible auxiliary isolating cavity and the distal expansible auxiliary isolating cavity. Potential hazards to human body due to characteristics such as excessively high temperature when a motor drive is in operation are avoided, and surgical safety and success rate are guaranteed.

Description

technical field [0001] The present invention relates to a medical device and method, more specifically, to a fluid-driven intravascular plaque removal device and method. Background technique [0002] For diseases such as arterial embolism, venous thrombosis, and arteriosclerotic obliterans, with the development of science and technology in recent years, the treatment method of percutaneous transluminal atherectomy has been greatly developed. Currently more mature systems include SilverHawk of Covidien in the United States TM Peripheral atherectomy system, Peripheral Rotablator from Boston Scientific, USA TM Rotational Atherectomy System and Jetstream TM Atherectomy System, Straub Medical, Switzerland S, American Volcano Atherectomy System and Diamondback of CSI in the United States Peripheral Orbital Atherectomy System, etc. Silver Hawk TM etc. is a directional resection system consisting of a cutting device and a tubular casing (nasal cavity) that collects cuttin...

AI Technical Summary

Problems solved by technology

Diamond back The characteristic is that the same catheter can achieve different rotary cutting radii through speed control, and only contact with part of the tube wall at the same time, which effectively reduces the heat generation, but it has a certain effect on the inner wall of the diseased blood vessel while controlling the rotary cutting radius. potentially destructive

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