Fig. 4.

These are changes in airway resistance (Raw) during laparoscopic assisted colectomy. Raw during head-down position (D20, D10) is higher than neutral position (N). All parameters at PP 15 are higher than at PP 10. Raw after deflation of pneumoperitoneum (End) is higher than Raw 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 PI.