Fig. 1.

These are changes of peak airway pressure (Ppeak) during laparoscopic assisted colectomy. Peak airway pressure (Ppeak) during head-down position (D20, D10) is higher than in the neutral position (N). All parameters at PP 15 are higher than PP 10. Ppeak after deflation of pneumoperitoneum (End) is higher than Ppeak before insufflation (PI). ^*PP 10: peritoneal pressure 10 mmHg, PP 15: peritoneal pressure 15 mmHg, D20: head-down 20°, D10: head-down 10°, U20: head-up 20°, U10: head-up 10°. Values are express as mean ± SD. P < 0.05 compared with neutral position, ^†P < 0.05 compared with PP 10, ^‡P < 0.05 compared with PI.