Fig. 2
From: Retrospective analysis of pulse oximeter alarm settings in an intensive care unit patient population
Patient record example of SpO2 signal and alarm thresholds. a Example SpO2 data from one patient during an ICU stay. Diamonds indicate time points when the alarm conditions were met (black: 90 % - 15 s, green: 88 % - 25 s, gold: 86 % - 35 s, red: 84 % - 45 s). As the threshold is decreased and delay increased, there is a reduction in the number of alarms. b Example SpO2 data record from another patient record. In this example, the alarm rate for each setting is high when the mean SpO2 is close to the threshold level