Upper endoscopy, also called esophagogastroduodenoscopy, or egd, is a procedure in which a thin scope with a light and camera at its tip is used to look inside of the upper digestive tract- the esophagus, stomach, and the first part of the small intestine, called the duodenum. This procedure is commonly used to help identify the causes of abdominal or chest pain, nausea and vomiting, heartburn, intestinal bleeding, and swallowing problems. This procedure is performed out patient at The Endoscopy Center at Southwest General Health Center.