Sunken Fontanelle in Pediatrics — Case | Pediatric Emergency | SMLE Q#18806
SMLE Question #18806
Pediatrics
Pediatric Emergency
Objective: OBJ-OPH-REFERRAL-001
Last updated: March 2026
A 6-week-old boy is brought to the ED for 1 week of progressively worsening forceful, non-bilious vomiting after each feed. His parents report poor weight gain and fewer wet diapers. He appears dehydrated with a sunken fontanelle and delayed capillary refill. Abdominal ultrasound shows pyloric muscle thickness of 4 mm and channel length of 18 mm. What is the most appropriate initial management step?
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