A thrombectomy catheter

Abstract

The invention discloses a thrombus removal catheter, which comprises a thrombus removal head, a thrombus breaking knife, a transmission cable, a partition tube, an outer sheath tube and a tail end connector; the thrombus removal head is a tubular hollow tube with at least one thrombus removal hole structure, the bolt breaking knife is a tubular hollow structure with at least one blade, the bolt breaking knife is installed inside the bolt removing head, the bolt breaking knife is fixedly connected to the distal end of the transmission cable, the The proximal end of the plug head is fixedly connected to the distal end of the outer sheath tube, and the proximal end of the outer sheath tube is fixedly connected to the tail end connector; the partition tube is sleeved outside the transmission cable, The proximal end of the cut-off tube is fixedly connected to the tail-end connector, and the bolt breaking knife is set outside the cut-off tube; the tail-end connector is provided with a side hole, and the side hole is connected with the cut-off The cavity formed between the tube and the outer sheath communicates. In the thrombus retrieval catheter provided by the present invention, an isolating tube is arranged outside the transmission cable to prevent thrombus from winding the transmission cable and realize rapid and continuous thrombus retrieval.

Description

technical field [0001] The invention relates to a medical catheter, in particular to a thrombectomy catheter. Background technique [0002] Deep venous thrombosis (DVT) of the lower extremities is a disease caused by abnormal coagulation of blood in the deep veins of the lower extremities. DVT leads to increased venous pressure, obstruction of blood return, swelling, pain, and dysfunction of the lower extremities, and the risk of thrombus dislodging. The dislodged thrombus travels with the blood flow to the pulmonary artery, which can cause pulmonary embolism (PE). If DVT is not effectively treated in the acute phase, thrombus organization, venous obstruction, loss of valve function, venous reflux, and venous hypertension will form post thrombosis syndrome (PTS), which endangers limb survival and life safety. [0003] By taking orally or injecting aspirin, heparin or warfarin, the drug can enter the blood system, effectively dissolve venous thrombosis, and greatly reduce th...

AI Technical Summary

Problems solved by technology

However, the CDT treatment of DVT takes a long time for thrombolysis (the average thrombolysis time is 53.4 hours), which will lead to the following problems: long-term indwelling catheter, increasing the discomfort of the patient, and prolonging the hospital stay; repeated blood draws, requiring close monitoring and high-level care; Cases with severe swelling or even endangering the survival of the limbs are not conducive to opening the blood flow as soon as possible; the bleeding risk of thrombolytic drugs; CDT is not suitable for patients with high bleeding risk (such as severe hypertension, etc.), and is not suitable for patients in childbirth and pregnancy

The helical structure rotates very fast (40,000~60,000rpm) when the pump is pumped, which will drive the guide wire to rotate at a high speed, and some blood substances (such as fibrin, floating thrombus, etc.) will wrap around the guide wire exposed to the blood under the action of centrifugal force. On the surface of the wire, there is a risk of entangled thrombus, which may cause the guide wire to break

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