Gastroesophageal reflux disease in infant: relationship between Multichannel Intraluminal Impedance-pH monitoring and clinical outcome

Combined multichannel intraluminal impedance and pH-monitoring (MII/pH) is a new technique identifying refluxes irrespective of acidity and detecting their duration, proximal extent and pH. These features are important when studying gastroesophageal-reflux disease (GERD) in infants, in which weakly acid refluxes are prevalent. Clinical application of MII/pH is uncommon yet, owing to lack of reference values and difficult interpretation of the variables obtained. Aim of the present study was to investigate the relationship between MII-pH results and clinical outcome on a sample of GERD infants. Conclusions: MII-pH in first months of life could be useful to identify patients with high risk of presenting GER symptoms for more than 1 year. BEI is a pH independent variable with a significant relationship with symptoms duration. Our data highlight the clinical relevance of MII/pH-detected weakly acidic refluxes in GERD infant.