Ambulatory 24 hour oesophageal pH monitoring was performed in order to detect gastro-oesophageal reflux disease (GERD) in 74 patients presenting with poorly explained ear-nose-throat complaints. A significant number of these patients also benefited from other currently used methods for diagnosing GERD. Oesophageal pH-monitoring demonstrated GERD in half of the patients. For atypical GERD, 24 hour oesophageal pH-monitoring seems to be the most sensitive procedure.
De Ronde, T., Melange, M., Remacle, M., & Bertrand, B. (1991). Répercussions pharyngo-laryngées du reflux gastro-oesophagien. Intérêt de la pH-métrie oesophagienne chez 74 patients. Acta Gastro-Enterologica Belgica (Multilingual Edition), 54(2), 169-175. https://hdl.handle.net/2078.5/133558 (Original work published 1991)