[Prophylaxis of pulmonary embolism by inferior vena cava filter (author's transl)].

30 patients underwent implantation of the Mobin-Uppin filter for recurrent life threatening pulmonary embolism. 20 patients could be followed by phlebography. In 11 cases obstruction of the inferior vena cava was observed. Due to the collaterals having developed in the intermediate time there were no significant clinical symptoms below the obstruction.