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Table 1 Simulated SPO 2 values associated with FIO 2 and PaCO 2 /arterial pH

From: A critical assessment of monitoring practices, patient deterioration, and alarm fatigue on inpatient wards: a review

FIO2 PaCO255 mmHg (pH 7.26) Oximeter 90% alarm breach SPO2drift PaCO270 mmHg (CO2Narcosis) Oximeter 90% alarm breach SPO2drift
30 yo Patient Model
.21 SPO2 91% - +   + +
.24 SPO2 95% - - SPO2 89% + +
.27   - - SPO2 93% - +
.30 SPO2 98% - - SPO2 95% - -
50 yo Patient Model
.21 SPO2 89% + +   + +
.24 SPO2 94% - + SPO2 87% + +
.27   - - SPO2 93% - +
.30   - - SPO2 95% - -
75 yo Patient Model
.21 SPO2 87% + +   + +
.24 SPO2 93% - + SPO2 84% + +
.27 SPO2 96% - - SPO2 91% - +
.30   - - SPO2 95% - -