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Updated: Jul 14, 2026
Drug-Induced Sleep Endoscopy (DISE) with Target Controlled Infusion (TCI) and Bispectral Analysis in Obstructive Sleep Apnea
Published on: December 6, 2016
Expansion sphincter pharyngoplasty: a new technique for the treatment of obstructive sleep apnea
Kenny P Pang1, B Tucker Woodson
1Deaprtment of Otolaryngology, Pacific Sleep Centre, 20-01 Paragon, Paragon Medical Centre, Singapore, Republic of Singapore. kennypang@hotmail.com
Objective:
In this study, we assessed the efficacy of a new method (expansion sphincter pharyngoplasty [ESP]) to treat obstructive sleep apnea.
Study Design:
We conducted a prospective, randomized controlled trial.
Methods:
Forty-five adults with small tonsils, body mass index less than 30 kg/m2, of Friedman stage II or III, of type I Fujita, and with lateral pharyngeal wall collapse were selected for the study.
Results:
The mean body mass index was 28.7 kg/m2. The apnea-hypopnea index improved from 44.2 +/- 10.2 to 12.0 +/- 6.6 (P < 0.005) following ESP and from 38.1 +/- 6.46 to 19.6 +/- 7.9 in the uvulopalatopharyngoplasty group (P < 0.005). Lowest oxygen saturation improved from 78.4 +/- 8.52% to 85.2 +/- 5.1% in the ESP group (P = 0.003) and from 75.1 +/- 5.9% to 86.6 +/- 2.2% in the uvulopalatopharyngoplasty group (P < 0.005). Selecting a threshold of a 50% reduction in apnea-hypopnea index and apnea-hypopnea index less than 20, success was 82.6% in ESP compared with 68.1% in uvulopalatopharyngoplasty (P < 0.05).
Conclusion/Significance:
The ESP may offer benefits in a selected group of OSA patients.
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