Clinical and microbiological evaluation of piperacillin in elective biliary surgery.

Fifty patients undergoing electric biliary surgery were given piperacillin 2 g i.m. 2 h preoperatively followed by 2 g i.v. at the beginning of the operation. Venous blood and bile from the gall bladder and common bile duct were assayed for piperacillin. Blood levels exceeded 100 mg 1(-1) in all instances unless the protocol was not followed. Both gallbladder and common bile duct bile levels exceeded 50 mg 1(-1), and the only exceptions were due to poor penetration into three obstructed gallbladders. Common bile duct levels exceeded 50 mg 1(-1) even in the presence of obstructive jaundice. Only one patient developed a minor postoperative wound infection.