Blood vessel thrombus extraction device

Abstract

The invention provides a blood vessel thrombus extraction device which comprises a suction catheter for sucking a thrombus, a thrombus extractor for breaking the thrombus and a blocking structure for blocking the blood vessel in a region where the thrombus is located through self-expansion. When a thrombus extraction operation is carried out through the blood vessel thrombus extraction device provided by the invention, firstly, the blocking structure can stretch into the region where thrombus is located, then the blocking structure is expanded to block the blood vessel at the position where the thrombus is located so as to temporarily slow down or cut off flowing of blood at the position where the thrombus is located, and then the thrombus extraction operation can be carried out through the thrombus extraction device and the suction catheter. At the moment, the blood at the position where the thrombus is located flows slowly or stops flowing, and thus, when the suction catheter sucks the thrombus, the suction amount of the blood can be effectively reduced, and a patient is prevented from losing more blood.

Description

Technical field [0001] The present invention relates to the field of medical devices, and particularly to the field of interventional medical devices, particularly as a vascular embolectomy device. Background technique [0002] Venous thromboembolism (Venous Thromboembolism, VTE) including pulmonary thromboembolism (PulmonaryEmbolism, PE) and deep vein thrombosis (Deep Vein Thrombosis, DVT) two forms. DVT and PE, and have the same risk factors, more than 95% of emboli originating from the lower limbs, DVT and PE is VTE clinical manifestations in different parts of two kinds, at different stages. [0003] Deep vein thrombosis (DVT) refers to blood coagulation in abnormally deep venous lumen, the venous lumen obstruction, resulting in venous disorders, resulting in varying degrees of deep venous insufficiency. Lower limb and vena cava thrombosis formation under the most common, especially in the iliac - femoral vein thrombosis. If the patient is not timely and effective treatment, ...

AI Technical Summary

Problems solved by technology

Generally, the thrombus at the lesion site cannot be completely removed at one time, and the doctor needs to perform multiple catheter aspirations. Therefore, with the increase in the number of aspirations, the amount of thrombus extracted each time is decreasing, but it will lead to aspiration. increased blood volume

Moreover, due to the different degrees of bending of human blood vessels, it is impossible for the doctor to ensure that the suction catheter is completely aligned with the thrombus in the lesion during the suction process, which may lead to accidental pure blood suction, which will lead to excessive blood loss of the patient.

However, if the patient's blood loss is reduced by reducing the size of the suction catheter, the suction effect of the thrombus will be weakened, and the number of suctions will even be increased, and the damage to the patient is still unavoidable.

Especially for the aspiration of pulmonary thrombus, because the thrombus suction position is close to the blood vessel branch, the thrombus is easy to shift during the process, or slide from the left branch to the right branch, which directly increases the difficulty of subsequent suction

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