The String Test for Gastroesophageal Reflux

Hiatal Hernia and Gastroesophageal Reflux

“…The accuracy of the extended pH mon itoring has been shown to be as high as 90%. A screening te st for GER, based on esophageal pH, ha s been publi shed recentl y by Liebman (27). Th is simple study is performed by having the pat ient swallow a stri ng impregnat ed with a color pH indicato r, a nd , aft e r 15 min , checking the pH color for evidence of a low pH.…”