Methods Twenty patients with OSAS underwent multislice CT scan while awake and during sleep apnea episodes under monitoring of capnography, 18 age-matched normal subjects were selected as the control group. 方法20例OSAS患者,在呼气末二氧化碳仪的监控下,对其清醒及睡眠呼吸暂停期的上气道进行多层螺旋CT扫描检查。18例同龄正常成年人作为对照组。