ABG Review
Chemicals

Three major chemicals
o
Bicarb (HCO3)
o
Hydrogen (H+)
o
Carbonic acid (CO2)
Normal Levels

pH (7.35 – 7.45)

PaCO2 (35 – 45)

HCO3 (22 – 26)
Problem

pH: 7.3

PaCO2: 40

HCO3: 20
Problem

pH: 7.53

PaCo2: 30

HCO3: 24
Problem

pH: 7.20

PaCO2: 50

HCO3: 24
Problem

pH: 7.54

PaCO2: 43

HCO3: 29
Compensation

pH: 7.26

PaCO2: 51

HCO3: 29
Compensation

pH: 7.45

PaCO2: 52

HCO3: 35
Compensation

pH: 7.45

PaCO2: 52

HCO3: 35
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