Enteroscopy describes endoscopic examination of the small intestine, extending into the jejunum and/or the il- eum. EGD is normally used to describe procedures into the duodenum. Limited terminal ileal examinations are usually included under the term colonoscopy. "Push en-teroscbpy" (PE) is performed with a specifically designed -enteroscope, with or without an overtube, or a colono-scope without an overtube. Double-balloon enteroscopy (DBE) involves a specially coupled enteroscope and over-tube apparatus with balloons mounted on the distal ends of each component and is intended for examination of the entire jejunum and the ileum. Single-balloon enteroscopy (SBE) uses a similar concept with an enteroscope and an overtube that contains a balloon on its distal end. Intrao-perative enteroscopy (IOE) is a procedure in which an endoscope is inserted orally or via an enterotomy and is manually guided through the small bowel with surgical assistance. Wireless capsule endoscopy (WCE) is a purely diagnostic technology that is used to identify and roughly localize lesions. Sonde enteroscopy is also purely diagnostic, and uses a very long small-caliber endoscope that is passed deep into the small bowel by peristalsis over the course of several hours and is then retracted for viewing. Sonde enteroscopy is an obsolete technique and will not be reviewed further.
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