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Pulse oximetry trace (SpO2) from the MrOS database. (A) T90desaturation is the time spent below 90% oxygen saturation associated with acute desaturation patterns of at least 4%. The long arrow indicates a desaturation event and the short arrows indicate the time below 90% for the event. (B) T90non-specific is the time spent below 90% oxygen saturation associated with non-specific drifts [4].
