In OR, before pneumoperitoneum, prophylactic i.v. antibiotics will be administrated in total 550ml crystalloids (NaCl 0.9%, Fresenius Kabi Ab, Sweden) to all patients. Infusion of buffered glucose solution (25mg/ml, Fresenius Kabi Ab, Sweden) at rate 1.5ml/kg IBW/h will be initiated to all patients. Stroke volume variation ≥ 12 % is used as a threshold for administration of additional colloids 3ml/kg/ IBW during surgery.