폐쇄성 수면무호흡증 환자의 두개골계측 소견과 수면다원검사의 연관성

Background and Objectives: The polysomnography is essential for diagnosis of obstructive sleep apnea syndrome (OSAS) and provides important objective informations. But that is cumbersome, expensive and time consuming. The cephalometry is easy to perform on an outpatient basis and well demonstrates bony and soft tissue structures. The purpose of this study was to compare results of polysomnography with cephalometry, and to know the important anatomic landmarks, which influence the severity of OSAS. Materials and Method: We carried out a retrospective study of 42 OSAS patients. All OSAS patients had full night polysomnography. Twenty cephalometric variables and body mass index were measured in all subjects. Cephalometric variables were compared between supine and erect position of patients and correlation between polysomnographic findings (apnea-hypopnea index and O2 saturation) and multiple parameters in cephalometry were analyzed by Pearson correlation test. Results: Apnea-hypopnea index was correlated with perpendicular distance from the anterosuperior point of the hyoid to the mandibular line, length between retrognathion and hyoid, length between vallecula and tongue tip and cross-sectional area of oropharynx. Oxygen saturation was correlated with length between the anteroinferior tip of the C3 vertebra and hyoid, length between vallecula and tongue tip, length between retrognathion and hyoid, cross-sectional area of tongue and cross-sectional area of soft palate. Conclusion: Several parameters of cephalometry were correlated with the results of polysomnography and the cephalometric study is a simple and useful method to analyze OSAS patients. (J Clinical Otolaryngol 2008;19:193-199)