Many recipients of retrievable IVC filters, designed to protect against pulmonary embolisms, may have complications and yet not even be aware that there is a danger associated with the devices being left in place past a specified period of time. Devices left in place longer than 50 days may increase the risk of blood clots and deep vein thrombosis as well as other complications that include migration, fracture, embolization, perforation and the inability to remove the devices.