Inferior vena cava temporary filter

Abstract

An interior vena cava temporary filter comprises a filtering structure on the lower portion and a recycling rod on the upper portion, and is characterized in that the recycling rod is provide with a wire hanging structure, a long traction wire is arranged at the position of the wire hanging structure, and the other end of the long traction wire is free; a sleeve structure is arranged on the outerside of the long traction wire, and a push rod which pushes out of the filtering structure by pushing the recycling rod is further arranged in a sleeve; the lengths of the long traction wire and the sleeve can ensure that the long traction wire is arranged in the sleeve and the long traction wire and the rear end of the sleeve are arranged in vitro; the sleeve and the other portions of the long traction wire are arranged in blood vessels. The wire hanging structure is a combination of an oblique notch or a traction wire ring; and the filter is a conical filtering structure, a spindle-shaped filtering structure or a crease mark filtering structure. The long traction wire is arranged on the filter, the recycling rod can be effectively prevented from being inclined, and because the long traction wire is fixed in vitro, the long traction wire can be convenient to collect after being used; and by the filtering structure consisting of multiple crease marks, the purpose of adjusting the interior vena cava temporary filter according to the circumstance of the sizes of blood vessels of a patent can be achieved.

Description

technical field [0001] The invention belongs to medical devices in the field of interventional radiation, in particular to a thrombus filtering device inserted into the inferior vena cava to prevent pulmonary embolism, in particular to a temporary filter for the inferior vena cava. Background technique [0002] Pulmonary embolism (referred to as Pulmonary Embolism, PE) refers to the clinical and pathophysiological syndrome of pulmonary circulation disorder caused by endogenous or exogenous emboli blocking the pulmonary artery or its branches; severe cases may cause sudden death. Emboli usually originate from the deep veins of the lower extremities and pelvis, causing embolism by circulation to the pulmonary arteries; but rarely originate from the veins of the upper extremities, head, and neck. Studies have shown that deep veins originating from the lower extremities and pelvis account for 60%-90% of the sources of emboli. Therefore, a thrombus filter can be placed below the...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of the conical thrombus filter in the prior art, the recovery head is easy to stick to the blood vessel wall, and the single-layer filter effect of the filter is poor, the present invention provides a temporary filter for inferior vena cava

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