[Pre-operative and postoperative thrombosis prophylaxis (author's transl)]

After some general remarks about varicosis and thrombosis the indications for thrombosis prophylaxis are discussed. Mechanical and medicamentous prophylaxis are dealt with and the pharmacodynamics of dihydroergotamin (DHE) and "low dose" heparin are explained. Finally the results of thrombosis prophylaxis at the department of surgery II of the Landeskrankenhaus Graz in the years 1974-1978 are reported.