End of the surgery Ondansetron 4mg Discontinuation of propofol TCI Extubation based on TOFF ratio > 90% Remifentanil TCI 2ng/ml Post-operative analgesia (PACU) Remifentanil TCI: gradual withdrawal: reduction of 30% / 15 mins (2 -> 1.4 -> 1 -> 0.7-> 0.5 -> 0.35 -> 0.25 -> 0 ng/ml) Acetaminophen 1g/6h Diclofenac 1mg/kg /12h Morphine (two mg /5 min if NRS > 3/10) (As all patients are monitored and under immediate medical surveillance, no limit will be imposed to morphine consumption.)