Oxygen uptake (VO2) = CO x 13.4 x Hb x ( SaO2-SvO2 )

(normal: 200-300 mL/min or 110-160 mL/min/m2)
CO (L/min)
Hb = hemoglobin (g/dl)
SaO2 (%)
SvO2 is venous O2 saturation (%)