A vena cava filter is an umbrella-shaped barrier device that is
inserted into the large vein that returns blood to the heart from the abdomen
and legs (inferior vena cava). This filter helps prevent blood clots that form
in the deep veins of the lower limbs from traveling to the lungs and heart
where they may block blood flow.
Vena cava filters are inserted into the vena cava using a catheter
inserted through a vein located in the neck or groin.
