FIELD: medicine. SUBSTANCE: method involves applying all-day pH monitoring concurrently at four areas of the gastrointestinal tract: in esophagus, cardia, remote and antral stomach segments by means of transnasal pH-metric probe with four measuring electrodes. pH being lower than 4.0 when read from electrode disposed in the esophagus, gastroesophageal reflux is to be diagnosed. pH being higher than 4.0 when read from electrode disposed in the antral stomach segment, duodenogastric reflux is to be diagnosed. EFFECT: high accuracy of diagnosis and treatment administration.
