title: Mouth opening during sleep may be a critical predictor of surgical outcome after uvulopalatopharyngoplasty for obstructive sleep apnea.
abstract: OBJECTIVE
  To evaluate the value of mouth opening during sleep for predicting surgical outcomes after uvulopalatopharyngoplasty (UPPP).
  
  
  METHODS
  Retrospectively, 69 out of 120 consecutive patients with obstructive sleep apnea who underwent uvulopalatopharyngoplasty at an academic tertiary referral center were included in this study. Sixty-nine subjects underwent cephalometry, nocturnal polysomnography and sleep videofluoroscopy before and after UPPP. Multiple parameters from the above studies were evaluated as potential predictors of UPPP outcomes.
  
  
  RESULTS
  Multivariate analysis showed that an increased angle of mouth opening during sleep was the only significant predictor for surgical failure (p < 0.001). The angle of mouth opening could predict surgical outcome with predictive values of 72.4% and 82.5% for success and failure, respectively.
  
  
  CONCLUSIONS
  Sleep videofluoroscopy during sleep revealed that the simple measurement of mouth-opening angle could outstandingly predict surgical outcome.
authors.affiliation: Department of Otorhinolaryngology, University Bundang Hospital, Seongnam, Korea.
authors.forename: Chul Hee
authors.initials: CH
authors.lastname: Lee
authors.forename: Ji-Hun
authors.initials: JH
authors.lastname: Mo
authors.forename: Beom Seok
authors.initials: BS
authors.lastname: Seo
authors.forename: Dong-Young
authors.initials: DY
authors.lastname: Kim
authors.forename: In-Young
authors.initials: IY
authors.lastname: Yoon
authors.forename: Jeong-Whun
authors.initials: JW
authors.lastname: Kim
mesh_terms: D000328:Adult; D000368:Aged; D002508:Cephalometry / Q000379:methods / Q000706:statistics & numerical data; D005260:Female; D005471:Fluoroscopy / Q000379:methods / Q000706:statistics & numerical data; D006801:Humans; D008297:Male; D008875:Middle Aged; D009055:Mouth; D010159:Palate / Q000601:surgery*; D010614:Pharynx / Q000601:surgery*; D017286:Polysomnography / Q000379:methods / Q000706:statistics & numerical data; D011237:Predictive Value of Tests; D019651:Plastic Surgery Procedures / Q000379:methods; D012189:Retrospective Studies; D012890:Sleep; D020181:Sleep Apnea, Obstructive / Q000503:physiopathology / Q000601:surgery*; D016896:Treatment Outcome; D014609:Uvula / Q000601:surgery; D014743:Videotape Recording / Q000379:methods / Q000706:statistics & numerical data; D055815:Young Adult
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