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Anesthesia literature review.

A retrospective study compared two groups of patients who had undergone major noncardiac surgery and who had undergone a polysomnography study for assessing obstructive sleep apnea (OSA) syndrome within 3 yr. The patients with an apneahypopnea index of 5 or more (282) were defined as OSA, and the remaining patients (189) served as the control group. Both groups were adjusted and classified according to a propensity score. The presence of OSA syndrome was associated with a higher risk of hypoxemia, postoperative complications, and longer hospital stay (fig. 1). The severity of OSA was not associated with a greater incidence of complications.