Henderson-Hasselbalch Ratio — FRCA Final MCQ

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HardIntensive Care MedicineHenderson-Hasselbalch RatioFRCA Final

Henderson-Hasselbalch: at pH 7.40, the HCO3/dissolved CO2 ratio is:

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Reveal the answer and explanation

Correct answer: B — 40:1

pH 7.40 = 6.1 + log(ratio); ratio = 20:1. HCO3 24 / dissolved CO2 1.2 = 20:1.

Reference: RCOA – 2023 – Acid-base physiology