Discussing the influence of electrode location in the result of esophageal prolonged pH monitoring.

Background: There is a large consensus to preserve the distance of 5 cm above the proximal border of the lower esophageal sphincter (PBLES) as appropriate to the location of the electrode of the pH-metry. The main objective of this study is to determine whether placement of the electrode below the recommended location achieves a significant difference in the calculation of the DeMeester score.

Methods: The study was made up of 60 GERD patients and 20 control subjects.