Which acid-base disturbance occurs in vomiting from pyloric stenosis?
Answer and explanation
Correct answer: B. Hypochloraemic hypokalaemic metabolic alkalosis
- Step 1: Loss of gastric acid causes alkalosis.
- Step 2: Kidneys retain hydrogen at the expense of potassium.
Answer
Hypochloraemic hypokalaemic metabolic alkalosis.
Why not the others: 'High anion gap metabolic acidosis' is not the pattern; 'Respiratory acidosis from hypoventilation' is not the pattern; 'Normal anion gap metabolic acidosis' is not the pattern.
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