Oxygen uptake (VO
2
) = CO x 13.4 x Hb x ( SaO
2
-SvO
2
)
(normal: 200-300 mL/min or 110-160 mL/min/m
2
)
CO (L/min)
Hb = hemoglobin (g/dl)
SaO
2
(%)
SvO
2
is venous O
2
saturation (%)