How is an upper gastrointestinal (GI) endoscopy performed?

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Lawrence S. Friedman, MD
Gastroenterology
Upper gastrointestinal (GI) endoscopy is a method of viewing the inside of the stomach and duodenum (the first part of the small intestine) to look for signs of inflammation or tissue damage. Upper GI endoscopy is considered the gold standard for testing for gastroesophageal reflux disease (GERD) and peptic ulcers.

An endoscope is a flexible tube with a light and camera at the end used to view the interior of the esophagus and stomach. During this procedure, the patient lies on his or her side as the doctor gently slides the scope through the mouth and down the esophagus into the stomach, while watching for lesions on a video monitor.

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