Vena cava filter

Abstract

The invention provides a vena cava filter, and relates to the field of medical instruments. The vena cava filter comprises a support frame and a filter body, The filter body comprises a fixed arm, an anchoring arm and a recovery hook; the near end of the fixed arm and the near end of the anchoring arm are both connected to the opposite end of the hooking end of the recovery hook, and an anchoring part is arranged at the far end of the anchoring arm, and the anchoring part is anchored to the inner side face of the support frame; in a release state, the support frame is unfolded to be cylindrical, and the far end of the fixed arm and the far end of the anchoring arm are opened around, so that the fixed arm and the anchoring arm are unfolded to be of an umbrella shape; and the anchoring part can be separated from the support frame under the condition that the recovery hook is applied with an external force for dragging towards the near end. The vena cava filter solves the problems that in the prior art, after a vena cava filter is released in a blood vessel, the implanted position is prone to bleeding, the filter implantation time is short, and a filter is difficult to take out safely; and meanwhile, the shifting of the filter can be avoided after the vena cava filter is released in the blood vessel.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a vena cava filter. Background technique [0002] Venous Thromboembolism (VTE) refers to the formation of blood plaques in veins, most commonly in deep veins of the lower extremities, known as deep vein thrombosis. An embolus may break off from where it formed and enter the bloodstream, a condition called an embolism. VTE has many clinical manifestations, venous thrombosis is generally asymptomatic, occasionally pain and lower extremity edema, some emboli will enter the lungs, leading to potentially fatal pulmonary embolism; symptomatic venous thrombosis , often lead to a series of complications; chronic venous insufficiency can bring long-term symptoms, thus leading to venous ulcers and emboli after limb changes, manifested as chronic pain, swelling and skin changes, severe cases can lead to pulmonary embolism . [0003] Pulmonary embolism refers to a pathological...

AI Technical Summary

Problems solved by technology

[0010] The object of the present invention is to provide a vena cava filter, on the basis of avoiding the displacement of the filter after the vena cava filter is released in the blood vessel, and solve the problems of bleeding at the implantation site and filter implantation after the vena cava filter is released in the blood vessel in the prior art. The problem of short insertion time and difficulty in taking out the filter safely

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