Mechanical thrombus removal system

Abstract

The invention relates to a mechanical thrombus removing system which comprises a catheter mechanism, a nozzle mechanism and a fluid power source, the catheter mechanism comprises an outer catheter and a high-pressure pipe arranged in the outer catheter, a catheter cavity is formed between the high-pressure pipe and the outer catheter, the nozzle mechanism is communicated with the high-pressure pipe, and a plurality of fluid jet holes are formed in the nozzle mechanism in the circumferential direction of the nozzle mechanism. According to the thrombus aspirator, the catheter mechanism and the nozzle mechanism are arranged, high-pressure fluid is jetted into the catheter cavity through the fluid jet holes, negative pressure is generated near the thrombus aspirating hole, thrombus located outside the outer catheter is aspirated into the catheter cavity, and the high-pressure fluid can crush the thrombus entering the catheter cavity; a plurality of strands of high-pressure fluid are gathered on the central axis of the outer catheter and flow towards the near end, so that positive pressure distribution is formed near the spraying hole, the gathered jet flow is sprayed out of the spraying hole, the gathered jet flow sprayed out of the spraying hole can be stirred in thrombus, thrombus suction can be promoted, and the entrainment capacity can be improved.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a mechanical thrombus removal system. Background technique [0002] A thrombus is generally a solid mass that abnormally coagulates due to the activation of platelets and coagulation factors during blood flow, and is mainly composed of insoluble fibrin, deposited platelets, accumulated white blood cells and trapped red blood cells. In the acute or subacute phase of thrombosis, the thrombus is generally soft and spongy, and over time, the thrombus becomes firm and fibrotic. Blood clots can block blood vessels, affecting blood flow and causing lesions in tissues and organs. In addition, the whole or part of the thrombus falls off and becomes an embolus, which forms an embolism along with the blood flow. If the embolism contains bacteria, it will cause a septic infarction or abscess of the embolized tissue. [0003] The existing mechanical thrombectomy (Percutaneous mechan...

AI Technical Summary

Problems solved by technology

However, the catheter mechanism in the prior art has poor thrombolysis and thrombus suction effects, and the efficiency of thrombus removal is low. In the prior art, the catheter mechanism mostly uses high-pressure fluid as the power source for mechanical crushing and suction of embolic objects. One-way steel balls and ball seats are installed in the high-pressure chamber of the high-pressure fluid source, but when the ball seats are under high pressure, the one-way steel balls may be pressed too deep into the ball seats, and one-way balls are prone to occur. Risk of steel ball sticking and sticking

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