title: [The variation of nasal obstruction in patients with OSAS].
abstract: OBJECTIVE
  To study the variation of nasal resistance and its possible relationship to obstructive sleep apnea.
  
  
  METHODS
  The detection of nasal resistance and polysomnography were performed in 30 normal subjects, 30 snoring patients and 60 patients with OSAS.
  
  
  RESULTS
  The study reveal that nasal resistance of the patients with OSAS (1.06 +/- 4.25) Pa.s/ml, (2.29 +/- 9.74) Pa.s/ml or snoring (0.71 +/- 0.31) Pa.s/ml was higher than that of normal group (0.40 +/- 0.13) Pa.s/ml (P < 0.01). There was a positive correlation between nasal resistance and snoring index (r = 0.258, P < 0.01), but there was no correlation among AHI, waken intervals, and nasal resistance.
  
  
  CONCLUSIONS
  Nasal resistance increased in the patients with snoring or OSAS, it may be a factor related with OSAS.
authors.affiliation: Department of Respiratory, General Hospital of Tianjin Medical University, Tianjin 300052, China.
authors.forename: J
authors.initials: J
authors.lastname: Cao
authors.forename: B
authors.initials: B
authors.lastname: Chen
authors.forename: B
authors.initials: B
authors.lastname: Zhu
mesh_terms: D000328:Adult; D006801:Humans; D008875:Middle Aged; D015508:Nasal Obstruction / Q000503:physiopathology*; D020181:Sleep Apnea, Obstructive / Q000503:physiopathology*