An Inferior vena cava filter (IVC filter), earlier popularly known as Greenfield filter, is a medical device implanted in the inferior vena cava just below the kidneys to capture blood clots, preventing them from reaching the heart and lungs, thereby, safeguarding against life-threatening pulmonary emboli (PE). IVC filters were only cleared for use through the 510(k) process since 1976 and are not approved by the Food and Drug Administration (FDA). C.R. Bard, Inc. and Bard Peripheral Vascular, Inc. (collectively, Bard) and Cook Incorporated, Cook Medical LLC, and William Cook Europe ApS (collectively, Cook) are the main manufacturers of retrievable IVC filters. Other manufacturers include Rex Medical, Johnson & Johnson, ALN, B. Braun Medical, and Rafael Medical.
The IVC Filter deployment is done by interventional radiologists or vascular surgeons. It is generally recommended to patients for whom anticoagulation therapy is contraindicated or ineffective.