GERD at WSTTags: Gastrointestinal sonography, Video, Clinical report, Esaote MyLab 70, Pediatric Posts 21:35 14-01-2017 GERD at WST#1 A child 3 years from ENT from private clinic on the water-siphon test. After drinking in the cardia of the stomach there is a reverse flow of fluid into the esophagus (gastroesophageal reflux disease?). external link :: attachments(1) :::: file 1 :: HTML5 video plugin not supported!