Pulmonary embolism preventing and thrombus removing device

Abstract

Disclosed is a system device integrating a thrombus filtering function, a pulmonary embolism preventing function and a thrombus removing function. The system device is characterized by comprising a thrombus filter screen and a thrombectomy basket, wherein the thrombus filter screen comprises an exterior screen body, an interior screen body and an overall conveying sheath, the interior screen body passes through a cavity of the exterior screen body, the exterior screen body penetrates through the overall conveying sheath, the thrombectomy basket passes through a cavity of the interior screen body, and each of the interior screen body, the exterior screen body and the thrombectomy basket is provided with an extendable part and a retractable part.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a thrombus protection and removal device, in particular to a pulmonary embolism protection and thrombus removal device. Background technique [0002] Venous thromboembolism (VTE) is a common potentially fatal emergency, including deep vein thrombosis and pulmonary embolism, with an incidence rate of 4% to 20%. Acute pulmonary embolism (APE) has become a common disease in my country. Cardiovascular system diseases, the fatality rate is 30%, and acute massive pulmonary embolism is a common cause of sudden death. In the United States, the annual incidence of pulmonary embolism is 600,000, and the fatality rate is 25% to 30%. The incidence rate is high; at the same time, if deep vein thrombosis cannot be removed in time, it will form deep vein thrombosis syndrome after a long time. Therefore, timely removal of deep vein thrombosis (especially central venous thrombosis) and prevention ...

AI Technical Summary

Problems solved by technology

Their common disadvantages are: (1) Once the filter captures emboli, it needs to continue thrombolysis and prolong the indwelling time in the body (the indwelling time of the filter is short, generally only 2 to 3 weeks). It is not easy to remove; if the thrombus is large and cannot be dissolved, it will be forced to stay in the body for a long time; (2) The filter needs to be removed and requires corresponding operation techniques, which will increase medical costs; (3) No matter what kind of filter can remove the thrombus, if you want to remove it Thrombosis needs to be combined with thrombolysis, embolism, etc., which needs to be equipped with corresponding equipment, and its medical expenses will increase significantly; , due to the small anchoring space, the vena cava filter often cannot play a protective role; (5) The diameter of the inferior vena cava >35mm is a contraindication for filter implantation

[0012] The disadvantages of surgical thrombectomy are: (1) pre-implantation of inferior vena cava filter is required to prevent pulmonary embolism caused by thrombus dislodgement; (2) surgical incision of soft tissues such as inguinal skin is required, femoral vein is anatomically separated, and thrombolysis with catheter , Suction embolism and other trauma; (3) Technically, surgeons are required to complete it, and interventional surgeons cannot do it independently; (4) Postoperative recurrence rate is high, except for femoral bruises and other serious deep vein thrombosis, there are few. Thrombectomy

[0016] The disadvantages of thrombolytic therapy are: (1) It is often necessary to implant a vena cava filter before surgery to prevent pulmonary embolism caused by thrombus dislodgement; (2) Thrombolysis is not complete, and the instructions of thrombolytic drugs require that the time window for thrombolysis is 12 hours after thrombus formation However, when the patient sees a doctor, the thrombus has often been formed for 3 to 5 days, or even longer, and the old and new thrombus are often mixed, so the thrombus often cannot

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