A 5-week-old boy arrives with progressive nonbilious projectile vomiting after feeds. Triage acuity is ESI 3; BP 86/52 mm Hg, HR 158/min. He is

Question

A 5-week-old boy arrives with progressive nonbilious projectile vomiting after feeds. Triage acuity is ESI 3; BP 86/52 mm Hg, HR 158/min. He is hungry after vomiting and has mild dehydration. Labs show hypochloremic metabolic alkalosis. Which of the following is the most appropriate imaging study?

Accepted Answer

Abdominal ultrasound of the pylorus

Answer

CT head without contrast

Answer

Renal ultrasound

Answer

Barium enema

Answer

Chest radiograph

Pyloric stenosis — ABEM Board MCQ

A 5-week-old boy arrives with progressive nonbilious projectile vomiting after feeds. Triage acuity is ESI 3; BP 86/52 mm Hg, HR 158/min. He is hungry after vomiting and has mild dehydration. Labs show hypochloremic metabolic alkalosis. Which of the following is the most appropriate imaging study?