A 4-week-old boy has projectile non-bilious vomiting after every feed and a palpable olive-shaped mass. What metabolic abnormality is expected?
Answer and explanation
Correct answer: C. Hypochloremic hypokalemic metabolic alkalosis
- Step 1: Loss of gastric acid in pyloric stenosis causes hypochloremic, hypokalemic metabolic alkalosis.
- Step 2: Surgery follows rehydration.
Answer
Hypochloremic hypokalemic metabolic alkalosis.
Why not the others: The other disturbances do not match loss of hydrochloric acid.
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