The Greenfield vena cava filter.
D005374:Filtration / Q000295:instrumentation*; D006801:Humans; D007866:Leg / Q000601:surgery; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000517:prevention & control; D011655:Pulmonary Embolism / Q000517:prevention & control*; D014682:Vena Cava, Inferior