“…Recently, in two similar prospective studies, Oksar et al [ 10 , 11 ] monitored blood gas and end-tidal CO 2 values and hemodynamic parameters (heart rate, mean arterial, and central venous pressures) affected by CO 2 -pneumoperitoneum alone and in combination with Trendelenburg position and concluded that the main challenges associated with these conditions were the respiratory acidosis and “upper airway obstruction-like” clinical symptoms.…”