[Preventive and simultaneous operations of the abdomen].

Prophylactic and elective operations have the same risk. They require detailed and extensive information of the patient and documentation thorough medical reasoning. Without preoperative planning prophylactic operations are justified in severe conditions. Simultaneous operations increase the risk in case they represent major procedures or in septic interventions. Simultaneous surgical interventions of the stomach and the biliary tract imply a high morbidity (13% pulmonary embolism and pneumonia) and a high lethality (15%). In simultaneous operations the fastest of the skilled surgeons is the one who is most successful.