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Retrospective analysis of pulse oximeter alarm settings in an intensive care unit patient population

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Academic year: 2020

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Figure

Figure 2 highlights the variability that can exist in alarmrates between different patients and at different SpO2alarm settings
Fig. 3 Distribution of patient alarm rates.number of records accounting for the percentage of total alarm rate
Fig. 4 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 %
Fig. 5 Consistency of high alarm rates. The percentage of patientrecords having X percent of 3 h segments with alarm rates ≥ 1alarm/h, for patient records with a minimum of 12 h of SpO2 data.For example, 55 % of patient records have at least 20 % of segmentswith an alarm rate of ≥ 1 alarm/h at the alarm setting of 90 %–15s.At 84 %–45s only 23 % of all records have at least 20 % of segmentswith an alarm rate of ≥ 1 alarm/h

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