The provider examines a portion of the small intestine for abnormalities with an endoscope, a tubular instrument with a light source and a camera, which he inserts through the mouth. He includes the first and second parts of the duodenum and goes into the jejunum, but he excludes the ileum, the terminal portion of the small intestine. He locates and removes swallowed objects that might obstruct or damage the intestines.
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