title: [Nasopharygeal size in obstructive sleep apnea syndrome].
abstract: OBJECTIVE
  To investigate the impact of upper airway 3-D size on the obstructive sleep apnea syndrome (OSAS).
  
  
  METHODS
  There were 20 male and 3 female OSAS patients involved in the research. The measured apnea-hypopnea index (AHI) was 45.72(24.01 episodes per hour of sleep). The items measured from magnetic resonance imageing (MRI) of upper airway size were compared to those from 12 normal controls that were sex and age matched to the OSAS patients. The Pearson correlation and multiple linear regression had done to investigate into the relationship of AHI and MRI data.
  
  
  RESULTS
  The OSAS patients had relatively narrow nasopharynges than matched controls in the following items: the sagittal size, transverse size, section area and volume. The measured sagittal size of the nasopharynx was closely related to AHI and Lown SaO2, and the volume of nasopharynx was related to apnea index (AI).
  
  
  CONCLUSIONS
  The nasopharyngeal size is closely associated with OSAS.
authors.affiliation: Department of Orthodontics, Stamatology School of Beijing Medical University, Beijing 100081.
authors.forename: X
authors.initials: X
authors.lastname: Gao
authors.forename: X
authors.initials: X
authors.lastname: Zeng
authors.forename: M
authors.initials: M
authors.lastname: Fu
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009305:Nasopharynx / Q000473:pathology*; D020181:Sleep Apnea, Obstructive / Q000473:pathology* / Q000503:physiopathology