[The possibilities of reflux disease diagnosis by the ear, nose and throat specialist].

Reflux disease has gained in importance over the last decade since we know that many of the symptoms and diseases of the upper aerodigestive tract might be associated with reflux. However, a distinction needs to be made between extraesophageal reflux (EER) and gastroesophageal reflux disease (GERD). There are several techniques available for the diagnosis of EER. Furthermore, there are various pH monitoring devices to determine acid contamination of the larynx and the pharynx. In addition, flexible transnasal esophagoscopy is a practicable technique for the rapid examination of reflux, its cause as well as the diagnosis of reflux-induced mucosal changes in the esophagus. The present article describes the instruments used for the diagnosis of reflux against the background of our own experience and the international literature.