Esophageal pH Monitoring

**Definition:** Analysis of the HYDROGEN ION CONCENTRATION in the lumen of the ESOPHAGUS. It is used to record the pattern, frequency, and duration of GASTROESOPHAGEAL REFLUX.

**Tree numbers:** - E01.370.372.255 - E01.370.520.215

**Synonyms:** - Esophageal pH Recording - Monitoring, Esophageal pH