An instrument which is used to get an image of the upper gastrointestinal tract; namely, the esophagus, the stomach and the duodenum: The esophagogastroduodenoscope is inserted through the mouth and its operation requires the presence of a highly trained physician and often requires sedation.

The objective of using an esophagogastroduodenoscope is to identify ulcers, gastritis, esophagitis, varices, duodenitis, Barrett's esophagus, hiatal hernias, and tumors.

A esophagogastroduodenoscope procedure is performed on patients with a variety of symptoms; that include: nausea, vomiting, abdominal bloating, abdominal pain, heartburn, reflux, family history of cancer, jaundice, weight loss, anemia, and gastrointestinal bleeding.