Which electrolyte should be replenished in hyperophic pyloric stenosis ?: (A) Sodium, (B) Hydrogen, (C) Chloride, (D) Bicarbonate
Answer is C. Hypochloremic, hypokalemic metabolic alkalosis is the classic electrolyte and acid-base imbalance of pyloric stenosis. This prolonged vomiting causes progressive loss of fluids rich in hydrochloric acid, which causes the kidneys to retain hydrogen ions in or of potassium. Reference: GHAI Essential pediatrics, 8th edition