Alveolar Gas Equation Practice Answer Key

1.      PAO2= (685-47).55 – 45/0.8  OR [45 x 1.25]

                               350.9      -     56.25 = 294.65

            PAO2 = 294.65

2.      PAO2= (702-47).21 – 56/0.8 OR [56 x 1.25]

       137.55   -     70 = 67.55

            PAO2 = 67.55

3.      PAO2= (740-47).28 – 42/0.8 OR [42 x 1.25]

       194.04    -     52.5  = 141.54

            PAO2 = 141.54

4.      PAO2 = (747-47).21 – 31/0.8 OR [31 x 1.25]

                     147       -     38.75 = 108.25

PAO2 = 108.25

5.      PAO2 = (730-47).42 – 60/0.8 OR [60 x 1.25]

286.86       -      75 = 211.86

            PAO2 = 211.86