Intraoperative care Intraoperative systolic, diastolic and mean arterial pressures (SBP, DBP, and MAP), HR, arterial oxygen saturation(SaO2), and temperature will be continuously monitored with a Datex AS/3 (Engestrom®, Helsinki, Finland) monitor. All patients in the GA group will mechanically be ventilated, with maintenance of peak inspiratory pressure between 18 and 30 cmH20, and end-tidal CO2 (ETCO2) between 30 and 50 mmHg. Additionally, urine output will be measured at 30-minute intervals.