Calculation of AV oxygen difference and cardiac output using the Fick method

Hgb: serum hemoglobin (g/dL)
SaO2: arterial oxygen saturation (percent) measured from arterial blood
SvO2: mixed venous oxygen saturation (percent) measured from the pulmonary artery in the absence of a shunt or calculated using MvO2 = [3 SVC saturation + IVC saturation] divided by 4 if a left to right shunt is present.
Constant values: 1.34 mL O2 per gram Hgb; 10 dL per L.