Lung and Respiratory - A-a Gradient

A-a Gradient

Input:

Age
Patient Temp
Elevation
Percent Inspired O2
p CO2
Resp Quot
p aO2

Results:

Expected AaG
Measured AaG

Decimal Precision:

Formula Notes References

ExpectedAaG = 2.5 + (0.21 * Age)

MeasuredAaG = (FIO2 * (pAtm - pH2O)) - (pCO2 / RespQuot) + (pCO2 * FIO2 * (1 - RespQuot) / RespQuot) - paO2

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