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Restriction is defined as partially closing an orifice or the lumen of a tubular body part. The restriction root operation can be performed on an orifice that is natural or artificially created. The objective of the restriction procedure is to narrow the diameter of a tubular body part or orifice. This includes either intraluminal or extraluminal methods for narrowing the diameter.
Examples of restriction procedures include esophagogastric fundoplication, cervical cerclage, and clipping of an aneurysm.