[Pathophysiology of venous thrombosis (author's transl)].

The pathophysiology of venous thrombosis is determined mainly by the triad of Virchow (hypocirculation, endothelial lesion of vessels, coagulation disturbances). Various predisposing factors are known. Thrombocytes are of utmost importance in the initial phase of thrombus formation, while fibrin and red cells influence the length of the clot and the extent of pulmonary embolism. Postoperative venous thrombosis occurs more frequently and earlier than hitherto thought (radiofibrinogen test). General prophylaxis is indicated for its effective prevention.