Esophagogastroduodenoscopy (Upper Endoscopy)
This procedure is used to examine the lining of the esophagus, stomach, and upper duodenum for inflammation, ulcers, or growths. It can rule out disorders such as acid reflux or hiatal hernia. The physician uses a small camera, called an endoscope, which is inserted into the mouth and guided down the throat. The examination usually lasts from 5 to 20 minutes.