Correlation between oropharyngeal pH‐monitoring and esophageal pH‐impedance monitoring in patients with suspected <scp>GERD</scp>‐related extra‐esophageal symptoms

Abstract

The correlation between OP pH-metry and pH-MII was weak. At present, the absence of a reliable gold standard for the diagnosis of LPR and the uncertain etiology of the pharyngeal pH alterations make it difficult to decide which is the most reliable technique for the diagnosis of true LPR.