Vena Cava Filters
Vena cava filters are placed in major veins to prevent blood clots from entering the lungs in patients who are likely to have recurring clots. The vena cava is a large vein that returns blood from your lower body to your heart. These filters are placed into the vena cava in the abdomen and trap blood clots that have broken loose and prevent them from reaching the lungs.
Vena cava filters is placed through the large vein in the neck or through a vein in the groin. X-rays are used to show where the filter can be safely placed. The filter is then released by a special catheter that holds the filter inside.