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What is Investigation of choice for neonatal hyperophic pyloric stenosis is _________ and explain in detail?
The usual age of presentation is approximately 2 - 6 weeks of life. Approximately 95% of infantile hyperophic pyloric stenosis cases are diagnosed in those aged 3-12 weeks. In addition, premature infants have a delayed diagnosis secondary to low bih weight and atypical presentation. DIAGNOSIS : History and physical examination Abdominal USG: Pyloric muscle thickness >3-4mm pyloric length > 15-18mm in presence of functional gastric outlet obstruction Upper GI study when atypical presentation or negative USG Diagnostic: narrowed, elongated pyloric channel with pyloric mass effect on stomach and duodenum -- String/ Double tract / Beak / Pyloric teat sign Reference: GHAI Essential pediatrics, 8th edition