what is a gerd/meds blood test for
Diagnosis of GERD is based on: 1  Your symptoms. 2  A test to monitor the amount of acid in your esophagus. 3  An X-ray of your upper digestive system.  A flexible tube to look inside your 1  esophagus. A test to measure the movement of the esophagus.  Preparing for your 1  appointment. Treatments and  drugs.