Featured Articles from May 2014

Parameters From Preoperative Overnight Oximetry Predict Postoperative Adverse Events

The objective of this study is to investigate the role of preoperative overnight oximetry in predicting postoperative adverse events. Consented patients underwent a preoperative overnight monitoring of oxygen saturation with a portable oximeter. 573 patients were studied. Oxygen desaturation index (ODI), cumulative time percentage with SpO2 <90% (CT90) and mean SpO2 were identified as significant predictors for postoperative adverse events. The patients classified as high risk by ODI or CT90 or mean SpO2 had a significantly higher rate of postoperative adverse events. For ODI >28.5 vs ODI ≤28.5 events/h, the odds ratio adjusted with age, gender, body mass index and American Society of Anesthesiologists physical status was 2.2 (95% CI: 1.3–3.9). The authors conclude that patients with mean preoperative overnight SpO2 <92.7% or ODI > 28.5 events/h or CT90 >7.2% are at higher risk for postoperative adverse events. Overnight oximetry could be a useful tool to stratify patients for the risk of postoperative adverse events.