Determination of Optimal Positive End-expiratory Pressure Using Electrical Impedance Tomography in Children Under General Anesthesia: Comparison Between Supine and Prone Positions

"1. General anesthesia is done in routine manner~2. A sensor for electrical impedance tomography (EIT) is applied around the patient's chest.~3. In supine position, lung recruitment maneuver is done, followed by decremental PEEP trial. Based on EIT parameter, optimal PEEP which induces minimal overdistension and collapse of lungs is determined.~4. One hour after prone position, optimal PEEP is determined again."