关键词: 睡眠呼吸暂停低通气综合征, 阻塞性, 体层摄影术, X线, 计算机, 呼吸暂停低通气指数

Abstract: Objective To investigate the relationship between upper airway CT measurements and apnea hypopnea indexes of patients with obstructive sleep apnea hypopnea syndrome (OSAHS). Methods The pharynxes of 42 patients with OSAHS were scanned by CT during normal respiration and deep inspiration. CT measurements were made in crosssection areas with their corresponding sagittal and transverse diameters, and their pharyngeal collapsibility was also determined. Results （1） The smallest crosssection area of OSAHS was at the velopharyngeal level. (2) At the velopharyngeal level CT measurements were negatively correlated with AHI during normal respiration and deep inspiration, and at the tonguepharyngeal level CT measurements were negatively correlated with AHI during deep inspiration in moderate and serious OSAHS. (3) The collapsibility of different pharynx levels was not correlated with AHI in all cases. Conclusions The collapsibility of different pharynx levels has no correlation with AHI.

Key words: Sleep apnea hypopnea syndrome, obstructive, Tomography, X-ray, computed, Apnea hypopnea index