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Assuring adequate oxygen delivery is a central tenet in the intensive care unit (ICU); however, some studies have suggested harm from tissue hyperoxia. In two recent trials, researchers attempted to determine the best target for oxygenation in critically ill patients.
In a trial from Vanderbilt, 2500 patients who were receiving mechanical ventilation were randomized to peripheral oxygen saturation (SpO2) targets that were high (96%–100%), intermediate (92%–96%), or low (88%–92%). Every 2 months during the 3-year study, the target value was changed for all patients cared for in the medical ICU and emergency department. Protocolized adjustments to reach the target SpO2 were limited to fraction of inspired oxygen (FiO2; i.e., not other ventilat…