“…OLV-induced hypoxic pulmonary vasoconstriction and intrapulmonary shunt can partially affect changes in airway pressure (25), which is the reason for employing P MAX in this study. However, no significant differences were observed in P MAX between patients in Group P and Group C, which is likely a consequence of the specific surgical procedure of combined laparoscopy and thoracoscopy, the specific model of the double-lumen endotracheal tube and male-dominated subjects.…”