Inferior vena cava filter

Abstract

The utility model discloses an inferior vena cava filter which comprises a recycling hook, a plurality of filtering ribs, a plurality of fixing thorns and a sheathing canal used for containing the filter, one ends of the filtering ribs are fixedly connected with the recycling hook, the fixing thorns are connected to the other ends of the filtering ribs, the filtering ribs are distributed in a bundle shape, and the filtering ribs are made of elastic memory materials. In a storage state, the filtering ribs are in a gathering state; in the natural state, the tail ends of the filtering ribs are bent downwards to form an arch shape, the outer side faces of the filtering ribs are concave faces, the inner side faces of the filtering ribs are convex faces, the fixing thorns are located on the outer side faces of the filtering ribs, in the natural state, the recycling hook is located in the center of the multiple filtering ribs, and the multiple fixing thorns face the same direction and extend in the direction away from the recycling hook. The thorn tips of the fixing thorns face upwards; when the filter is used, the recovery hook is always positioned in the middle of the plurality of filtering ribs, so that the contact between the recovery hook and the vein wall is effectively avoided, and the filter is convenient to take out.