title: Radiofrequency ablation for the treatment of mild to moderate obstructive sleep apnea.
abstract: OBJECTIVE
  Obstructive sleep apnea syndrome is due to pharyngeal obstructions, which can take place at the level of the soft palate. Temperature-controlled radiofrequency ablation has been introduced as being capable of reducing soft tissue volume and excessive compliance. The aim of the study was to evaluate prospectively the possible efficacy of temperature-controlled radiofrequency ablation applied to the soft palate in subjects with mild to moderate obstructive sleep apnea syndrome.
  
  
  METHODS
  Twenty-nine patients with a respiratory disturbance index between 10 and 30 events per hour, body mass index equal to or less than 30 kg/m2, and obstruction at the level of the soft palate were included in a pilot, prospective nonrandomized study.
  
  
  METHODS
  Snoring and daytime sleepiness were evaluated subjectively. Treatment (maximum of three sessions) was discontinued when the bed partner was satisfied with the snoring level. A full night recording was performed at least 4 months after the last treatment.
  
  
  RESULTS
  Mean snoring level decreased significantly from 8.6 +/- 1.3 to 3.3 +/- 2.5 on a visual analogue scale (0-10). Daytime sleepiness decreased nonsignificantly. Mean respiratory disturbance index decreased significantly from 19.0 +/- 6.1 events per hour to 9.8 +/- 8.6 events per hour. Mean lowest oxygen saturation value increased nonsignificantly from 85.3% +/- 4.1% to 86.4% +/- 4.4%. Of the patients, 65.5% were cured of their disease.
  
  
  CONCLUSIONS
  Temperature-controlled radiofrequency ablation was effective in selected patients with mild to moderate obstructive sleep apnea syndrome. A full-night polysomnography is required after completion of treatment to rule out residual disease.
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Foch Hospital, Suresnes, France.
authors.forename: Marc Bernard
authors.initials: MB
authors.lastname: Blumen
authors.forename: Serge
authors.initials: S
authors.lastname: Dahan
authors.forename: Bernard
authors.initials: B
authors.lastname: Fleury
authors.forename: Chantal
authors.initials: C
authors.lastname: Hausser-Hauw
authors.forename: Frederic
authors.initials: F
authors.lastname: Chabolle
mesh_terms: D017115:Catheter Ablation / Q000379:methods*; D005260:Female; D006801:Humans; D016014:Linear Models; D008297:Male; D008875:Middle Aged; D010865:Pilot Projects; D017286:Polysomnography; D011446:Prospective Studies; D020181:Sleep Apnea, Obstructive / Q000175:diagnosis / Q000601:surgery*; D016896:Treatment Outcome