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Uptodate Reference Title
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.
