No single test identifies reflux as the etiology for extra-esophageal symptoms.
It is well recognized that reflux can be causal in subgroups of patients with chest and ENT symptoms like asthma, cough, hoarseness, sore throat, sinusitis, and ear pain. However, the possibility of reflux as the cause for a variety of ENT symptoms is both overestimated and often abused. In fact, the cause of extraesophageal symptoms