Other outcome measurements
PNEUMOPERITONEUM
After pneumoperitoneum using carbon dioxide (CO
Laparoscopic surgical grade of gastric insufflation. The amounts of gastric contents and gas through Levin tube suction was also measured after surgical grading. A 50 cc syringe was connected to Levin tube and pulled to aspirate the gastric contents and gas. Additionally, vital signs including oxygen saturation and PSi were checked at five time points from before to after induction: (1) immediately after entering operating room; (2) before induction; (3) immediately before intubation; (4) immediately after intubation; and (5) one minute after intubation.