Thrombus extraction system for treating large-size thrombus and use method thereof

Abstract

The invention relates to a thrombus extraction system for treating a large-size thrombus and a use method thereof. The thrombus extraction system comprises a self-expansion stent, a first connecting pipe, a connecting rod, an extension line, a pressing block and a handle; the self-expansion stent, the first connecting pipe, the connecting rod, the extension line and the pressing block are sequentially connected from left to right; and the extension line is sleeved with the handle. The use method of the thrombus extraction system comprises steps: sending a guide wire to a thrombus position; sending a micro-catheter to the far end of the thrombus; removing the guide wire from the micro-catheter; when inserting a cannula into half of a hemostasis valve, loosening the hemostasis valve; sending the cannula to an interface of the micro-catheter; tightening the hemostasis valve; sending the self-expansion stent into the micro-catheter; taking down the cannula; controlling and pushing the extension line by the handle; retracting the micro-catheter; releasing the self-expansion stent; embedding the thrombus with the self-expansion stent;l drawing out the self-expansion stent and the micro-catheter; carrying out negative pressure suction on the micro-catheter by an injector; enabling the micro-catheter to enter a long sheath tube; turning off the hemostasis valve; and drawing out the self-expansion stent, the micro-catheter and the hemostasis valve to complete thrombus extraction.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a thrombectomy system for treating large-size vascular embolism and a usage method thereof. Background technique [0002] Pulmonary embolism is a pathological and clinical state caused by an impacted object entering the pulmonary artery and its branches, blocking the blood supply to the tissue. Most common emboli are thrombus, and the rest are rare new biological cells, fat droplets, air bubbles, and drug particles. Some patients with pulmonary embolism can resolve their pulmonary embolism without treatment, but studies have found that the mortality rate of patients without treatment will exceed 20%. At present, the common treatment methods are mainly guide wire catheter thrombus fragmentation, thrombus aspiration, and intracatheter thrombolysis. When existing devices are used alone to remove thrombus, the removal effect of large pulmonary artery thrombus is...

AI Technical Summary

Problems solved by technology

Suboptimal removal of large pulmonary artery thrombus when using existing devices alone

[0003] Chinese patent CN112438777A discloses a minimally invasive thrombectomy device for treating vascular embolism, including a thrombus retriever, a sleeved delivery system outer tube, a delivery system inner tube, and a delivery system handle. In the clamp cavity formed between the inner tubes of the delivery system, the distal end of the inner tube of the delivery system is connected to the proximal end of the thrombus remover, and the handle of the delivery system is arranged on the proximal end of the inner tube of the delivery system. The proximal end and the distal end of the thrombus retriever, and the screw-shaped middle section connecting the proximal end and the distal end, the diameter of both ends of the thrombus retriever is larger than the diameter of the middle section of the thrombus retriever, and the distal end of the thrombus retriever is covered with a polymer film, and the unresolved treatment diameter is larger Large vascular embolism problem

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