The mother of the 7-week-old infant reports the baby has had fewer and fewer wet diapers and hasn’t stooled in 3 days despite having a ravenous appetite. The mother reports that the child has been vomiting with increasing force and volume over the past two weeks. The emesis just appears to be partially digested breastmilk and fluid. The infant appears well and vitals are normal. Upon palpation of the abdomen, a small, olive-shaped mass is appreciated. The nurse alerts the provider and prepares education for which procedure?  

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