Journal of Rhinology 2011;18(1):20-28.
Published online May 31, 2011.
Relationship between Upper Airway Computed Tomography in the Awake State and Polysomnograpy in Obstructive Sleep Apnea Patients
Ji Hoon Kim, Tae Sub Chung, Na Hyun Kim, Sang Yeob Seong, Gi Bong Lee, Kyung Su Kim
1Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea.
2Department of Radiology, Yonsei University College of Medicine, Seoul, Korea.
폐쇄성 수면무호흡증 환자에서 각성시 촬영한 상기도 전산화 단층촬영과 수면다원검사의 연관성
김지훈, 정태섭, 김나현, 성상엽, 이기봉, 김경수
연세대학교 의과대학 이비인후과학교실,1 진단방사선학교실2
Background and Objectives
The aims of this study were to evaluate the anatomical features of patients with obstructive sleep apnea syndrome (OSAS) using upper airway computed tomography (CT) in the awake state, and to analyze the correlation between anatomical features and severity of polysomnography (PSG) findings.
Materials and Method
S: Sixty-eight patients presenting with snoring and sleep apnea were included, and upper airway CT in the awake state and PSG were performed in all patients. The average apnea-hypopnea index (AHI) and minimal arterial oxygen saturation (minSaO2) values were calculated. The axial and sagittal images from the level of the nasopharynx to that of the hypopharynx were obtained and measured. The correlations of the anatomical parameters with AHI and minSaO2 were statistically analyzed.
The significant parameters correlated with AHI were nasopharynx anterior-posterior (A-P) diameter and transverse diameter, soft palate transverse diameter, uvula length, tongue length, lingual transverse diameter, and hypopharynx A-P diameter & transverse di-ameter. The parameters correlated with minSaO2 were nasopharynx transverse diameter and lingual transverse diameter. Conclusions: Upper airway analysis using CT in awake OSAS patients provides anatomical parameters which correlate with the severity of OSAS. Therefore, upper airway CT in the awake state may be helpful in diagnosing OSAS.
Key Words: Airway obstruction;Tomogram;Sleep apnea, obstructive;Wakefulness

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