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Question 75 · LEK · Acid-base balance

Indicate the result of an arterial blood gas test which shows decompensated respiratory acidosis:

  1. A. pH - 7.30, pCO₂ - 55 mmHg, HCO₃ - 24 mmol/L.
  2. B. pH - 7.40, pCO₂ - 40 mmHg, HCO₃ - 25 mmol/L.
  3. C. pH - 7.50, pCO₂ - 30 mmHg, HCO₃ - 23 mmol/L.
  4. D. pH - 7.30, pCO₂ - 50 mmHg, HCO₃ - 19 mmol/L.
  5. E. pH - 7.48, pCO₂ - 28 mmHg, HCO₃ - 31 mmol/L.
Hint

Look for acidemia driven by high pCO2 with bicarbonate not yet raised by renal compensation.

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