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Explain Why Is Endoscopy Called Upper Gastroscopy

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Endoscopy is a nonsurgical procedure that uses an endoscope to examine the digestive tract. An endoscope is a slender and tubular instrument with an attached light and camera. Gastroscopy, also called upper gastrointestinal endoscopy, is an endoscopic examination of the esophagus, stomach and duodenum by means of an endoscope inserted through the esophagus. Gastroscopy patient should take a laxative and should not take any food or liquids for 8 hours prior to the examination. Colonoscopy is an endoscopic examination of the large intestine by means of an endoscope passed through the

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