Summary: SpO2 levels the ranges of PaO2 can be predicted fairly well When the SpO2 reads 90 93 the PaO2 of most infants will range around 45 55 torr and will unlikely be more than 65 70 torr Figure 4 O2 Sat and PaO2 Oxygen Dissociation Curve Within a saturation range of 83 93 the PaO2 will be between approximately 43 to 60 torr When an infant with normal lungs
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