Predictors of overnight postoperative respiratory complications in obese children undergoing adenotonsillectomy for obstructive sleep apnea.

O saturation nadir on PSG and time spent with oxygen saturation <90% (TST90) on PSG were found to be independent predictors of overnight postoperative respiratory complications after adenotonsillectomy in obese children. In addition to reaffirming existing guidelines for postoperative admission of patients with O saturation nadir on PSG <80%, these findings also suggest considering postoperative admission for obese patients who experience >0.5% sleep time with O sat <90% during PSG due to increased risk of overnight postoperative respiratory complications.