A device known as a vena cava filter (IVC) was implanted by doctors in hundreds of patients who are unable to take anticoagulants (blood thinners) in order to prevent blood clots from moving to the lungs. Three devices manufactured by C.R. Bard quickly came under criticism after reports surfaced of complications.
C. R. Bard IVC filters catch the clots in the blood stream and, over time, the clots dissipate. The IVC filter is retrievable and it is not designed to be permanent.
Soon after IVC filters were widely used, the U.S. Food & Drug Administration (FDA) received hundreds of adverse reports about the retrievable filters. Reported complications included punctured organs, blood vessels and filter migration to different parts of the body.