During robot-assisted laparoscopic radical prostatectomy (RALRP), patients are placed under general anesthesia and supported with mechanical ventilation. In this study, the effects of two different ventilatory strategies-flow-controlled ventilation (FCV) and volume-controlled ventilation (VCV)-were compared. Using electrical impedance tomography (EIT) to provide real-time assessment of lung status and to guide individualized positive end-expiratory pressure (PEEP) settings, we investigated whether FCV offers superior oxygenation and improved respiratory system mechanics compared with VCV.
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The ratio of arterial oxygen partial pressure to fractional inspired oxygen (PaO2/FiO2)
Timeframe: During the intraoperative period at four predefined time points: after induction of general anesthesia (T1), after pneumoperitoneum and Trendelenburg positioning (T2), 60 minutes after T2 (T3), and before extubation (T4).