title: Digital fluoroscopy before and after laser uvulopalatopharyngoplasty in obstructive sleep apnea. Importance of pharyngeal collapsibility and hyoid bone position.
abstract: OBJECTIVE
  To study the changes in pharyngeal behavior after laser uvulopalatopharyhgoplasty (LUPPP).
  
  
  METHODS
  The dynamic changes in the upper airway size were evaluated with digital fluoroscopy in 24 patients with obstructive sleep apnea (OSA) before and after LUPPP and in 16 normal controls, while they were awake and breathing normally. Cephalometric measurements were also made. The patients were classified into the categories of good and poor responders by means of a static-charge-sensitive bed.
  
  
  RESULTS
  Following LUPPP, collapsibility at the velopharyngeal level was within the normal range m 15 of 17 good responders, but only in 2 of 7 poor responders (p = 0.0086). The minimum airway size at the same level showed a similar trend. In 3 of 7 poor responders the hyoid bone was positioned more caudally than in the good responders (p = 0.017).
  
  
  CONCLUSIONS
  Digital fluoroscopy provides information on the change in upper airway behavior after LUPPP.
authors.affiliation: Department of Diagnostic Radiology, Turku University Hospital, Finland.
authors.forename: Y
authors.initials: Y
authors.lastname: Tsushima
authors.forename: J
authors.initials: J
authors.lastname: Antila
authors.forename: E
authors.initials: E
authors.lastname: Laurikainen
authors.forename: E
authors.initials: E
authors.lastname: Svedström
authors.forename: O
authors.initials: O
authors.lastname: Polo
authors.forename: M
authors.initials: M
authors.lastname: Kormano
mesh_terms: D000328:Adult; D005260:Female; D005471:Fluoroscopy / Q000379:methods*; D006801:Humans; D006928:Hyoid Bone / Q000033:anatomy & histology*; D053685:Laser Therapy / Q000379:methods; D008297:Male; D008334:Mandible / Q000033:anatomy & histology; D008875:Middle Aged; D010160:Palate, Soft / Q000033:anatomy & histology / Q000601:surgery; D010614:Pharynx / Q000033:anatomy & histology / Q000502:physiology* / Q000601:surgery; D012891:Sleep Apnea Syndromes / Q000601:surgery*; D014609:Uvula / Q000601:surgery