The role of upper airway morphology in apnea versus hypopnea predominant obstructive sleep apnea patients: an exploratory study.

Autor:	Özer T; 1 Department of Radiology, Health Sciences University, Derince Education and Research Hospital , Kocaeli , Turkey., Selçuk A; 2 Department of ENT, Health Sciences University, Derince Education and Research Hospital , Kocaeli , Turkey., Yılmaz Z; 3 Department of Neurology, Health Sciences University, Derince Education and Research Hospital , Kocaeli , Turkey., Voyvoda N; 1 Department of Radiology, Health Sciences University, Derince Education and Research Hospital , Kocaeli , Turkey., Çam İ; 1 Department of Radiology, Health Sciences University, Derince Education and Research Hospital , Kocaeli , Turkey., Özel HE; 2 Department of ENT, Health Sciences University, Derince Education and Research Hospital , Kocaeli , Turkey., Özdoğan F; 2 Department of ENT, Health Sciences University, Derince Education and Research Hospital , Kocaeli , Turkey., Esen E; 2 Department of ENT, Health Sciences University, Derince Education and Research Hospital , Kocaeli , Turkey., Genç G, Genç S; 2 Department of ENT, Health Sciences University, Derince Education and Research Hospital , Kocaeli , Turkey.
Jazyk:	angličtina
Zdroj:	The British journal of radiology [Br J Radiol] 2018 Jul; Vol. 91 (1087), pp. 20170322. Date of Electronic Publication: 2018 May 03.
DOI:	10.1259/bjr.20170322
Abstrakt:	Objective: The objective of this study was to investigate the association between upper airway morphology and apnea vs hypopnea predominance in patients with obstructive sleep apnea (OSA) syndrome. Methods: A retrospective study on consecutively CT scans obtained from 54 OSA patients and 53 non-snoring controls. CT scans were measured to evaluate upper airway and surrounding structures' morphologic characteristics. OSA patients (matched for age, gender and body mass index) compared as two groups; apneic group: apnea ratio >50% and hypopneic group: hypopnea ratio >50%. Morphologic characteristics were analyzed using Kruskal-Wallis test and Pearson's correlation test. Results: Apneic group (17 patients) showed 76.56% apnea rate and hypopneic group (37 patients) showed 78.46% hypopnea rate. Minimal lateral and anteroposterior dimensions of velopharynx in the apneic group (0.86 ± 0.73 and 0.21 ± 0.13 cm, respectively) was statistically lesser from that of the hypopneic group (1.2 ± 0.42 and 0.54 ± 0.22 cm, respectively). Minimum cross-sectional area of the velopharynx was also lesser in apneic group (0.21 ± 0.16 cm 2 ) than that in hypopneic group (0.65 ± 0.38 cm 2 ). Almost all upper airway parameters in both apneic and hypopneic groups were tended to be smaller than in controls. Conclusion: Decrease in airway volume does not signify the type of respiratory event, but significant narrowing of velopharynx in both dimensions; thus having the narrowest value below a certain level causes more apnea. Advances in knowledge: We did not find a similar study when we did a literature search, showing the relationship of apnea vs hypopnea predominance and upper airway parameters in CT in patients with OSA.
Databáze:	MEDLINE
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