Computed tomographic cephalometric analysis of Chinese patients with obstructive sleep apnoea
SUMMARY Variations of craniofacial and upper airway structures are recognized to contribute to the phenomenon of obstructive sleep apnoea (OSA). Most previous cephalometric studies were performed using erect lateral radiographs in Caucasian patients. The present project aims to determine cephalometr...
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Published in | Australasian radiology Vol. 44; no. 4; pp. 417 - 423 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Melbourne, Australia
Blackwell Science Pty
01.11.2000
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Subjects | |
Online Access | Get full text |
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Summary: | SUMMARY
Variations of craniofacial and upper airway structures are recognized to contribute to the phenomenon of obstructive sleep apnoea (OSA). Most previous cephalometric studies were performed using erect lateral radiographs in Caucasian patients. The present project aims to determine cephalometric measurements, utilizing CT, in normal Chinese subjects and in Chinese patients with OSA. Computed tomography of 25 patients with OSA (proven using overnight polysomnography), and of 25 age‐, sex‐, height‐, bodyweight‐ and body mass index (BMI)‐matched control subjects were prospectively performed. Thirteen standard bony and soft‐tissue measurements were obtained from the CT lateral scout view of the head and neck, taken with each subject in the neutral supine position. The cross‐sectional area was calculated at two axial levels (velopharynx and hypopharynx). The measurements in the two groups, OSA and control subjects, were compared. The measurements for hyoid position (P = 0.00), nasal cavity length (P = 0.01), mandibular prognathism (P = 0.05), tongue size (P = 0.02), oropharyngeal airway space (P = 0.02), posterior tongue airway space (P = 0.04) and cross‐sectional areas at the level of the velopharynx (P = 0.00) and hypopharynx (P = 0.01) differed significantly between the two groups. In conclusion, CT cephalometric measurements show that certain anatomical variations in the head and neck are likely to contribute to the pathogenesis of OSA in Chinese patients. |
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Bibliography: | istex:F5373DE405F10E417BC7123C97A3CE39F90763F8 ArticleID:JMIRO848 ark:/67375/WNG-3QX1D32J-K FRCP, FRCR WCG Peh FSK Chu MRCPsych. MSM Ip FRCR KF Chung MD, FRCP ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0004-8461 1440-1673 |
DOI: | 10.1046/j.1440-1673.2000.00848.x |