Cefuroxime was applicated 30 to 60 minutes before the begin of surgery. Drug Levels in blood and fat tissue were measured at skin cut (30-60 minutes after application of Cefuroxime), 45 minutes after skin cut (75-105 minutes after minutes after application of Cefuroxime) and at the end of surgery (up to 150 minutes after application of Cefuroxime) .