복강경 수술시 환자체위와 기복시간의 경과가 동맥혈 이산화탄소 분압과 호기말 이산화탄소 분압의 변화에 미치는 영향

During laparoscopic surgery with carbon dioxide (CO2) pneumoperitoneum, PaCO2 (arterial CO2 gas tension) and P(ET)O2 (end-tidal CO2 gas tension) will be affected by the durations of CO2 pneumo-peritoneum and the body positions. PaCO2 and P(ET)CO2 were investigated 5 minutes after induction of general anesthesia(control value), 10 minutes, 30 minutes and 60 minutes after CO2 gas insufflation, and 15 minutes after CO2 gas excretion. Seventy-two patients undergoing laparoscopic surgery under general anesthesia were allocated to two study groups: group I, laparoscopic appendectomy under the Trendelenburg position; group II, laparoscopic cholecystectomy under the reverse Trendelenburg position. In results, PaCO2 and P(ET)CO2 were significantly increased during laparoscopic surgery that associated with times of CO2 pneumoperitoneum. PaCO2 and P(ET)CO2 at 60 minutes after CO2 gas insufflation were increased from P(ET)CO2 control value 35.8±4.2 mmHg, P(ET)CO2 . control value 34.0±3.6 mmHg to P(ET)CO2 . 39.98.0 mmHg, P(ET)CO2 42.3±4.7 mmHg(p