Gastroesophageal Reflux in Children: Evaluation of the Water Siphon Test

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Abstract
Symptomatic children [59] were radiologically evaluated for gastroesophageal reflux with the water siphon test and also with the acid reflux test and esophageal manometry. Of those with reflux on pH testing, 95% had positive water siphon tests, and 38% also had spontaneous Ba reflux. Of those with negative acid reflux tests, 29% had positive water siphon tests. Lower esophageal sphincter pressure did not correlate with either test unless the pressure was < 10 mm Hg. Ba esophagography with the water siphon test is the appropriate initial examination in symptomatic patients, but the false-positive rate is high.

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