A filter device for capturing thrombi in a body vessel of a patient is disclosed. The device comprises first and second portions, each comprising a wire formed into a zig-zag configuration. The configuration comprises a series of straight sections and a plurality of bends connected to the straight sections. The straight sections are joined by the bends, defining a first cell size of the first portion and a second cell size of the second portion. The filter device further comprises a filter portion connected to the first and second portions. The filter portion comprises the wire formed into a zig-zag configuration having a series of straight sections and a plurality of bends connected to the straight sections. The straight sections of the filter portion are joined by the bends of the filter portion, defining a filter cell size of the filter portion. The filter portion is configured to be disposed at the arc of the iliac veins at the opening of the inferior vena cava.
