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DO2 Equation — FRCA Primary MCQ

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ModeratePhysiology - CardiovascularDO2 EquationFRCA Primary

Regarding oxygen delivery (DO2) which equation is correct?

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Correct answer: E — DO2 = CO × CaO2

DO2 = CO × CaO2 × 10 (for mL/min). Normal DO2 ≈ 5 L/min × 20 mL O2/100 mL blood = 1000 mL O2/min. This shows DO2 depends on both cardiac output and oxygen content.

Reference: Power Kam 2018 Principles of Physiology for the Anaesthetist