The invention provides a recoverable
lotus petal type double-layer point support
vena cava filter and a manufacturing method thereof. The invention relates to a double-layer
lotus petal type point support
vena cava filter. The filter comprises a recyclable column, a front filter screen, a rear filter screen and a net end fixing hook portion, wherein the recyclable column is located at the end of the filter, and the upper part of the recyclable column is provided with a
recovery hook; the front filter screen and the rear filter screen are defined by a plurality of
nickel-
titanium alloy filter wires which are scattered all around from the center of the
recovery column and have arc-shaped
petal shapes to improve the support rigidity, and are in front and rear interlacing, so that the meshes of the filter are more uniform, and the interception rate of
thrombus is effectively increased under the premise of ensuring sufficient
blood circulation area and smooth
blood circulation; fixing hooksare distributed at the arc-shaped petal ends of the front and rear filter screens, and are in
point contact with the
blood vessel during work, which reduces the damage to the
blood vessel caused by
recovery of the filter. At the same time, the filter screen is divided into front and rear parts, and support points are also divided into front and rear parts, which prevent the rotation of the filterand improve the stability of the point support filter in the
blood vessel, thus minimizing the risk of overall offset of the filter during installation and use.