Venous-thrombus aspiration device and aspiration system using same

Abstract

The invention relates to a venous-thrombus aspiration device and an aspiration system using the same. The venous-thrombus aspiration device comprises a catheter. An aspiration tube is arranged inside the catheter. The outer wall of the aspiration tube and the inner wall of the catheter form a cavity. The cavity is connected with a liquid injection tube provided with a first valve. A connector is disposed at one end of the catheter, and a compliance balloon is disposed at the other end of the catheter. The compliance balloon communicates with the cavity through a lateral hole in the wall of the catheter. The aspiration system comprises the venous-thrombus aspiration device, a thrombus filtering and returning device and a negative pressure device which are sequentially connected. The venous-thrombus aspiration device and the aspiration system have the advantages that the limitation of an excessively small thrombus discharging port is overcome, blood drawn out can be recycled at the same time, vein blood vessel damage is prevented during aspiration, and the whole aspiration operation has continuous and quantifiable negative pressure.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to a venous thrombus suction device and a suction system using the device. Background technique [0002] Venous thrombosis Blockage of veins is a common venous disorder. The disease can occur anywhere in the venous system, with the deep veins of the lower extremities being the most common, followed by the inferior vena cava. The disease is extremely harmful to the patient. Thrombus shedding into the pulmonary artery can cause fatal pulmonary embolism; and thrombus remaining in the deep vein of the lower extremity for a long time can cause post-thrombotic syndrome. It has been clinically proven that early treatment and thorough removal of thrombus are the core means of treating venous thrombosis. [0003] In the prior art, methods for treating venous thrombosis include: phlebotomy and thrombectomy, intravenous catheter thrombolysis and venous thrombus aspiration. Phlebotomy and thro...

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Problems solved by technology

[0005] 1. Regardless of the size of the lumen of the catheter or sheath currently used in thrombus aspiration, the final diameter of the thrombus outlet is equal to the outer diameter of the syringe connector. suction effect

[0006] 2. The blood in the thrombus-blood mixture cannot be recovered. At present, all thrombus aspiration devices cannot return the "suctioned blood" to the patient, which leads to excessive blood loss during thrombus aspiration

[0007] 3. There is no automatic suction power in the process of thrombus aspiration. The current thrombus aspiration can only rely on the syringe to provide suction power, and the power that the syringe can provide is neither quantifiable nor continuous

[0008] 4. The suction device does not have the ability of anti-adherence. At present, all catheters used for aspiration of thrombus do not have the ability of anti-adherence

If the catheter port is drawn directly against the vein wall, there is a high risk of rupture of the vein

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