Methods Seven patients underwent endoscopic thyroid operations under general anesthesia with endotracheal intubation. The pressure of CO 2 insufflation was set at 6 mm Hg. The arterial pH value and PaCO 2 were monitored. 方法2002年6月~2003年3月7例气管插管全麻下行腔镜下甲状腺手术,皮下充入CO2压力6mmHg,监测动脉血pH、PaCO2变化。