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It is uncertain which factors substantially influence outcomes after uvulopalatopharyngoplasty (UPPP) in patients with supine predominant obstructive sleep apnea (POSA) To explore the predictors of UPPP outcomes in POSA patients. A total of 108 patient(52 positional patients (POSA) and 56 nonpositional patients(NPP)), who underwent the revised uvulopalatopharyngoplasty (H-UPPP), were retrospectively studied. The pre-operative information of these patients, including polysomnography (PSG), and upper airway CT, were collected for analysis. No difference was found in surgical success rates between POSA and NPP undergoing H-UPPP. In POSA patients, there were statistically significant differences between responders and nonresponders in body mass index (BMI), preoperative supine AHI, time of SaO2 &lt; 90% (TS90) (all  p  &lt; .05), minimal anteroposterior airway (mAP) ( p  = .016), minimal lateral airway (mLAT) ( p  = .002), minimal cross-sectional airway area (mCSA) ( p  &lt; .001) at the velopharynx. mLAT ( p  = .014) and mCSA ( p  = .002) at the glossopharynx. The independent associated factors for surgical success were lower BMI ( p  &lt; .001), narrowerm LAT ( p  = .002) and mAP ( p  &lt; .001) at velopharynx, and wider mCSA ( p  &lt; .001) at glossopharynx in POSA. POSA patients with lower BMI, narrower mLAT and mAP at velopharynx, wider mCSA at glossopharynx were more likely to achieve a positive outcome with H-UPPP.

acta oto-laryngologica

Predictors of uvulopalatopharyngoplasty outcomes in patients with supine predominant positional obstructive sleep apnea: a prospective observational study