5. Flamm’s MVO2
• Average Oxygen Content in Chambers proximal to the
Shunt
• Method to calculate Mixed Venous Oxygen content
• Need to factor in Contribution from IVC and SVC which
is not equal
• Flamm Equation:
3xSVC Oxygen Content + IVC Oxygen Content
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7. Fick Equation to Calculate Oxygen Content
• Assumes in steady state that…
that rate of substance entering (C
in x Qflow) is equal to the rate
of substance leaving
(C out x Qflow) + the rate at
which indicator, V, is added.
Flow= Oxygen consumption/Arterial-
Venous oxygen content difference
• Where oxygen content is determined by
automated methods
• oxygen consumption is assumed based on
patient’s age, gender and body surface
area when not directly measured