Fig. 4
From: Retrospective analysis of pulse oximeter alarm settings in an intensive care unit patient population
Alarm rate variability during ICU stays. Alarm rates for each 3 h segment (vertical axis) of a subset of patient records (horizontal axis) using each alarm setting: a 90 % SpO2 threshold with 15 s delay, b 88 % SpO2 threshold with 25 s delay, c 86 % SpO2 threshold with 35 s delay, and d 84 % SpO2 threshold with 45 s delay. Each column represents one patient record from the beginning of the record (top) to the end of the record (bottom) with color depicting the alarm rate over the 3 h segment, saturated at 1 alarm/h (yellow indicates alarm rate of > =1 alarm/h)