رضيع بتضيق البواب مع قيء متكرر. أي نتيجة تحليل يتوقعها الممرض؟

An infant with pyloric stenosis has repeated vomiting. Which lab pattern does the nurse expect?

1. Metabolic alkalosis with low chloride and potassium
2. Respiratory acidosis with high CO2
3. Respiratory alkalosis with high serum chloride
4. Metabolic acidosis with high potassium

Answer: A) Metabolic alkalosis with low chloride and potassium. Loss of gastric acid through vomiting causes hypochloraemic, hypokalaemic metabolic alkalosis, corrected before surgery.