PURPOSE: We will demonstrate that a surgical resident with proven accuracy in the diagnosis of hypertrophic pyloric stenosis (HPS) can teach other surgeons to diagnose HPS with reproducible accuracy. METHODS: A surgical resident with proven sonographic accuracy in diagnosing HPS instructed 5 other surgical residents in the technique. Consecutive patients referred to pediatric surgery with a presumed clinical diagnosis of HPS were examined, and measurements of residents were compared with formal radiology studies. Each surgeon was proctored for 5 examinations before independent evaluation and was blinded to results from both radiologists and other residents. Results were evaluated using Student's t test; P less than .05 was considered significant. RESULTS: Seventy-one patients were evaluated by 5 surgical residents. Residents were diagnostically accurate in all cases. There was no statistically significant difference between pyloric muscle thickness or channel length measurements obtained by radiology and an
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