A vena cava filter (40) includes a plurality of filter legs (44) with distal ends (50). Each distal end (50) is a tip (52) which curves radially outwardly and ends in a spherical or part spherical enlarged head element (54). A biodegradable barb (56) is attached to the enlarged head element (54) and is made of a biodegrade material, such that after degradation the enlarged head element (54) also is left embedded in the vessel wall (60). The degradation of the barb (56) will prevent further penetration of the distal end (50) of the filter legs (44) into the vessel wall (60) and avoid any risk of piercing through the vessel wall (60). The enlarged head element (54) also ensures that the distal ends (50) of the filter legs (44) remain firmly attached into the vessel wall (60) in order to ensure correct long term placement of the filter (40) in the vessel.
