Vena cava filters: an update

Venous thromboembolism is a major health problem that results in significant long-term complications and mortality. The management of venous thromboembolism is complex and can be particularly challenging when pharmacological therapy alone cannot be effectively utilized. Vena cava filters provide protection from pulmonary embolism for patients in whom therapeutic anticoagulation is contraindicated or inadequate. Recent innovations in caval interruption have included the use of alternative imaging modalities for filter insertion and the emergence of devices designed to allow temporary caval filtration. These developments have been accompanied by a controversial increase in the use of vena cava filters for prophylactic indications in the absence of venous thromboembolism. In addition to a brief historical perspective on caval filtration, this update reviews the indications for vena cava filter insertion, associated complications, methods of caval imaging and filter insertion and current FDA-approved devices.