Estimated Electrolyte Deficits by Source of Loss

Source of Loss

Sodium Content (average content) (mEq/L)

Potassium Content (average content) (mEq/L)

Colonic (diarrhea)

50 to 100 (55)

5 to 80 (25)

Gastric (vomiting)

20 to 80 (60)

5 to 30 (10)

Data from Kliegman R, Geme J III: Nelson Textbook of Pediatrics, ed. 22. Philadelphia, Elsevier, 2024, vol. 1.