[Prevention of pulmonary embolism in surgery: analysis of 2 clinical cases]

After some short notices on the physiopathology of thrombosis, the AA. consider clinic, symptomatology and surgical therapy for prevention of pulmonary embolism. They outline that only a precocious operation and an exact diagnosis can help the patient who had had an embolism; in the end they report two cases, describing the operation and its indications.