Case List History Objectives Radiology Images Questions PEDIATRIC SURGERY Case #3 - A 4 week old male with projectile vomiting DISCUSSION QUESTIONS: 5.) What is paradoxic aciduria and how does this happen? Paradoxic aciduria occurs in hypertrophic pyloric stenosis and in adults with gastric outlet obstruction. The kidney puts a priority on maintaining volume by reabsorbing sodium ions in exchange for hydrogen ions. Therefore despite metabolic alkalosis, the urine may be acid.
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