Octopus-like recoverable vena cava filter

Abstract

The invention relates to an octopus-like recoverable vena cava filter. A basket net with fixing barbs is arranged at one end of a filter body, and six supporting rods are arranged at the other end ofthe filter body. The filter consists of a recovering hook, a connecting release nut, a connecting curved rod, the fixing barbs, a transition rod, a rhombic filtering net, a connecting pipe and the lower supporting rods. According to the filter, after the filter swells, an included angle of 15-90 degrees is formed between the transition rod and a longitudinal axis of the filter; after the filter isimplanted into the human body, the filter is not in contact with inner membranes of blood vessel walls, endometrial hyperplastic tissue can only climb to the fixing barbs and the lower supporting rods and cannot climb into a V-shaped structure formed between the transition rod and the rhombic filtering net, correspondingly the recovery resistance of the filter can be remarkably reduced when the filter is recovered, and the retention time of the filter in the human body can be fully prolonged, wherein the fixing barbs and the lower supporting rods are in contact with the blood vessel walls. Additionally, the fixing barbs on the upper portion of the filter and the lower supporting rods form a vertical supporting structure to guarantee the balance of the filter in blood vessels, the filter is prevented from tilting due to flushing of blood and movement of the human body, and filtration of thrombus is prevented from failing.

Description

technical field [0001] The patent of the present invention relates to a medical device for the cardiovascular system, in particular to a recyclable vena cava thrombus filter that can filter floating thrombus in the vena cava system and prevent pulmonary embolism and pulmonary infarction. Background technique [0002] At present, the lantern-shaped vena cava filter or the basket-shaped retrievable vena cava filter appearing on the market are all supported by a horizontal bar in the vena cava. This model has a good supporting effect. But there is a bad thing: because the supporting crossbars are long (greater than 10mm), there is a V-shaped bifurcation at both ends of the crossbar. Supporting crossbar and V-shaped bifurcated interior. As the product implantation time increases, the inner wall of the venous vessel will become more wrapped with proliferative tissue. When the product is recovered, the recovery resistance will increase with the prolongation of the implantation ti...

AI Technical Summary

Problems solved by technology

[0002] At present, the lantern-shaped vena cava filter or the basket-shaped retrievable vena cava filter appearing on the market are all supported by a horizontal bar in the vena cava. This model has a good supporting effect. But there is a bad thing: because the supporting crossbars are long (greater than 10mm), there is a V-shaped bifurcation at both ends of the crossbar. Supporting crossbar and V-shaped bifurcated interior

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