A 55-year-old man presents with acute confusion. ABG shows pH 7.35, PaCO₂ 22 mmHg, HCO₃ 12 mmol/L. Na 140, K 3.8, Cl 115 mmol/L. What is the

Question

A 55-year-old man presents with acute confusion. ABG shows pH 7.35, PaCO₂ 22 mmHg, HCO₃ 12 mmol/L. Na 140, K 3.8, Cl 115 mmol/L. What is the acid-base disturbance?

Accepted Answer

Normal anion gap (hyperchloraemic) metabolic acidosis with respiratory compensation

Answer

Pure respiratory alkalosis with renal compensation

Answer

Mixed metabolic and respiratory acidosis

Answer

High anion gap metabolic acidosis

Answer

Respiratory alkalosis

Normal Anion Gap Metabolic Acidosis — RACP Adult Medicine MCQ

A 55-year-old man presents with acute confusion. ABG shows pH 7.35, PaCO₂ 22 mmHg, HCO₃ 12 mmol/L. Na 140, K 3.8, Cl 115 mmol/L. What is the acid-base disturbance?