The ph test the ph test for acid reflux (gastroesophageal reflux disease or gerd) measures how often and for how long stomach acid enters the esophagus, and how well it clears the esophagus performed with a thin, plastic tube armed with a sensor, it measures the amount of acid backing up into the esophagus. Quiz for acid reflux. Test results can often be normal when reflux is present, but an endoscopy may detect inflammation of the esophagus (esophagitis) or other complications an endoscopy can also be used to collect a sample of tissue (biopsy) to be tested for complications such as barrett's esophagus ambulatory acid (ph) probe test.
quiz for acid reflux
