Mechanical thrombus aspiration device

Abstract

The invention provides a mechanical thrombus aspiration device. The mechanical thrombus aspiration device comprises a guide wire, a far-end assembly, a catheter set, a sheath tube base and a control handle. The far-end assembly is composed of a conical tip, a suction pipe with holes in the side wall and an outer frame. The far-end assembly is controlled to be switched between the release state and the recovery state through the control handle, in the release state, the far-end assembly is pushed out of the far-end end of the catheter set, and in the recovery state, the far-end assembly is recovered into the catheter set. The outer frame is of an enveloping net structure, and the outer frame is arranged on the outer side of the suction pipe in a sleeving mode. The axial length and the circumferential diameter of the outer frame can be adjusted, and the outer frame is attached to the inner wall of the blood vessel by adjusting the effective length and the outer diameter of the outer frame. When the mechanical thrombus suction device is used, small-size thrombus can directly flow into the outer frame, the net-shaped structure of the outer frame has the thrombus cutting capacity, and under the action of suction force of the suction pipe, large thrombus is cut by the outer frame, broken and squeezed into the outer frame so that the large thrombus can be conveniently sucked and removed by the suction pipe.

Description

technical field [0001] This specification relates to the field of medical devices, in particular to a mechanical thrombus suction device. Background technique [0002] Thrombosis is a disease caused by abnormal blood clots in the circulating blood of the human body. There are three main reasons for thrombus formation: damaged blood vessels, blood changes, and blood stasis. Thrombotic disease is a complication caused by the etiology of many different diseases. Due to the differences in various underlying diseases and the different embolism sites of thrombotic diseases, the clinical manifestations of thrombotic diseases are also different. [0003] Thrombus aspiration is an effective method used clinically in recent years. Its purpose is to quickly extract the thrombus blocking the diseased blood vessel through mechanical action, which can reduce the thrombus load and microvascular embolism, change the coronary blood flow, and reduce postoperative "slowness". The probability ...

AI Technical Summary

Problems solved by technology

In the existing thrombus suction system, one is to pass high-pressure heparin saline into the catheter and use Bernoulli's principle to generate negative pressure to crush and extract the thrombus. This method, because the suction time is relatively long, will Lead to excessive blood loss or hematuria, thereby prolonging the recovery time of the patient; the other is the cutting through the high-speed (generally 40,000 revolutions per minute) movement of the high-speed rotating catheter head and the long coil inside the catheter. The action and the negative pressure generated (generally about 43.5mmHg) make the cut thrombus fragments transported by the coil to the waste liquid collection bag at the active device, but in this way, the catheter head exposed to the blood High-speed rotation will cause excessive agitation in blood vessels, which will cause some unavoidable complications

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