Anesthesia induction and muscle relaxation will be standardized with 2 mg kg-1 propofol, 0.6 mg kg-1 rocuronium and 50 µg fentanyl. Anesthesia will be maintained with oxygen in nitrous oxide and desflurane. The desflurane concentration will be titrated to keep BIS between 40-60. The patients will receive 50 µg fentanyl boluses in case hemodynamic variables changed ≥30% from baseline values. Hypotension will be defined as ≥20% decrease in MAP from baseline values and will be treated with fluid boluses and/or ephedrine. Bradycardia will be defined as a heart rate <50 beat min and will be treated with atropine. All treatments will be recorded. At the end of surgery volatile anesthesia will be discontinued and the patients will be extubated according to clinical extubation criteria. The time elapsed from discontinuation of volatile anesthesia to eye opening with verbal commands will be recorded as time to emergence. The patients will be transferred to the post anesthesia care unit (PACU). The modified Aldrete score will be used to evaluate recovery in the PACU and the patients will be discharged from the PACU when the Aldrete score is ≥9 ( ). Post operative pain will be evaluated with a Visual Analogue Scale (VAS) score of 0-10 (0= no pain and 10= worst imaginable pain) at 1, 6, 12 and 24 hours postoperatively.