Nasal-CPAP, surgery, and conservative management for treatment of obstructive sleep apnea syndrome. A randomized study

Chest. 1996 Jul;110(1):114-9. doi: 10.1378/chest.110.1.114.


Study objective: To assess separately the effectiveness and safety of nasal-continuous positive airway pressure (N-CPAP) and that of surgery in comparison to conservative management in patients with obstructive sleep apnea syndrome (OSAS). DESIGN. A randomized study with 1-year follow-up.

Setting: A university hospital acting as a referral center for OSAS.

Patients: Symptomatic patients with OSAS (72 male and 4 female patients aged 18 to 65 years), who had oxygen desaturations in the overnight recording.

Interventions: After the initial diagnostic workup, patients were considered to be candidates for either N-CPAP (44 patients) or surgical treatment (uvulopalatopharyngoplasty [UPPP] with or without mandibular osteotomy) (32 patients). Within the groups, the patients were then randomized to either the assigned treatment or conservative management.

Main outcome measures: The number of nocturnal oxygen desaturation events of 4% or more per hour in bed (ODI4); daytime somnolence; side effects.

Results: N-CPAP Group: Compliance with N-CPAP therapy at 1 year was 13 of 21. The most common reason for noncompliance was general intolerance of CPAP. All compliant patients had a normal ODI4 ( < 10), whereas 1 of 20 of their control subjects had a normal finding. Patients receiving active treatment were significantly less somnolent than their control subjects at 1 year (p < 0.05). SURGERY GROUP: At 1 year, 7 of 18 of the surgically treated and 1 of 14 of the conservatively treated patients had a normal ODI4 (p < 0.001). Daytime somnolence was significantly less severe in the surgically treated patients compared with their control subjects (p < 0.001) both at 3 and 12 months. The overall postoperative complication rate was 22%.

Conclusions: N-CPAP is an effective therapy for OSAS, but compliance is a problem. Surgical therapy (UPPP with or without mandibular osteotomy) needs further evaluation.

Publication types

  • Clinical Trial
  • Comparative Study
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Esophagus / physiopathology
  • Female
  • Follow-Up Studies
  • Forced Expiratory Volume
  • Humans
  • Male
  • Mandible / surgery
  • Middle Aged
  • Osteotomy
  • Palate / surgery
  • Patient Compliance
  • Pharynx / surgery
  • Polysomnography
  • Positive-Pressure Respiration / adverse effects
  • Pressure
  • Sleep Apnea Syndromes / physiopathology
  • Sleep Apnea Syndromes / surgery
  • Sleep Apnea Syndromes / therapy*
  • Uvula / surgery
  • Vital Capacity