Home > Gastroenterology > New pH Moniter To Diagnose GERD Get the Flash Player to see this player. Rate: (Click the stars to rate) Published on Jan 13, 2009 by JJanson, Views: 7977 New pH moniter to diagnose GERD: Dr. Jan Janson, a gastroenterologist from Sentara health, discusses a new ph moniter from BRAVO. This new pH moniter is placed in the esophagus by a gastroenterologist, but is does not require a tube in the nose throughout the duration of the 24 hour period, and does not need to be retrieved.