A procedure in which fluid is passed into the rectum through a tube inserted into the anus. An enema may be given to clear the intestine of faeces, to relieve constipation or in preparation for intestinal surgery. Enemas are also used to administer medicine, such as corticosteroid drugs to treat ulcerative colitis. A barium enema is used to diagnose disorders of the large intestine (see barium X-ray examinations).


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