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Endoscopy is an examination using a tube-like device with a light on the end. A camera at the end of the tube transmits the lighted image before the tube to a TV screen so the the examiner can see the inside of the upper gastrointestinal tract as the tube advances.
Upper GI endoscopy is the endoscopic examination of the upper portion of gastrointestinal tract by endoscope for diagnosing or treating any disease of this area. It is a procedure performed by a gastroenterologist, who uses the endoscope to diagnose and, in some cases, treat problems of the upper digestive system. The procedure is used to discover the problems for swallowing difficulties, bleeding, indigestion, abdominal pain, nausea, vomiting, reflux, or chest pain.