Calculation of AV oxygen difference and cardiac output using the Fick method
Calculation of AV oxygen difference and cardiac output using the Fick method
Oxygen consumption is estimated from a nomogram based on age, sex, height, and weight. In addition, oxygen consumption can be measured directly using exhaled breath analysis.
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.
