Pyloric stenosis laboratory findings

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Mohamadmostafa Jahansouz M.D.[2]

Most common laboratory findings consistent with the diagnosis of infantile pyloric stenosis and adult type pyloric stenosis include hypokalemia, hypochloremia, and metabolic alkalosis.

• Laboratory findings consistent with the diagnosis of pyloric stenosis include electrolyte imbalances such as:^[1][2][3]
  • Hypokalemia
  • Hypochloremia
  • Metabolic alkalosis due to loss of gastric acid (which contains hydrochloric acid and potassium) via persistent vomiting.
• Any condition with severe vomiting may present with similar findings.

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