A device known as a vena cava filter (IVC filter) 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. But recently two IVC filter devices named Cordis OptEase and Cordis TrapEase have came under scrutiny after lawsuits reveal potential design defects.
The Cordis Optease IVC filter is an egg-shaped wire device and Cordis TrapEase IVC filter is a star-shaped wire device. They are both implanted in a blood vessel called the inferior vena cava, which separates the heart and lungs. The filters are designed to catch blood clots before they enter the lungs and cause a pulmonary embolism.
The Cordis TrapEase IVC filter is supposed to be permanent, but studies have linked it to a 50% risk of fracture within four years. In another study, researchers warned about an “extremely high risk” of fracture within 2-3 years.