pH Monitoring: Definition, Uses, and Clinical Overview
pH Monitoring is a diagnostic test that measures acidity over time in parts of the gastrointestinal (GI) tract. It is most commonly used to evaluate acid reflux in the esophagus. It helps clinicians connect symptoms to episodes of acid exposure. It is used in gastroenterology and GI surgery planning, especially around gastroesophageal reflux disease (GERD).