title: Umbrella filter implantation as prophylaxis against pulmonary embolism. Indication and reinvestigations.
mesh_terms: D005374:Filtration / Q000295:instrumentation; D006801:Humans; D008722:Methods; D011183:Postoperative Complications / Q000517:prevention & control; D011655:Pulmonary Embolism / Q000517:prevention & control*; D012008:Recurrence; D014682:Vena Cava, Inferior / Q000601:surgery*