The outcome of ileus varies depending on its cause.
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Ileus means obstruction of the ileum, the last part of the small
intestine. Paralytic ileus is a risk after surgery with general
anesthesia.
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A paralytic ileus is caused by an obstruction of the intestine
due to paralysis of the intestinal muscles. The obstruction does
not have to be complete to cause ileus.
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In paralytic ileus, the bowel stops moving contents along, and a
blockage occurs.