Double-contrast barium enema bowel. Double-contrast barium enema A double-contrast barium enema is a form of contrast radiography in which x-rays of the colon and rectum are taken using two forms of contrast to make the structures easier to see. A liquid containing barium (that is, a radiocontrast agent) is put into the rectum. Barium is a silver-white metallic compound that outlines the colon and rectum on an x-ray and helps show abnormalities. Air is also put into the rectum and colon to further enhance the x-ray. Double-contrast barium enemas are less invasive than a colonoscopy and have comparatively fewer issues in a viable
Colon cleansing or a "colonic", is a treatment which is used "to wash out the contents of the large bowel by means of copious enemas using water or other medication." During an enema, the water is retained in the colon for approximately 15 minutes. During a colonic, water is introduced into the colon and then it is flushed out and this is repeated until the entire colon is cleared. Colonic irrigation has been described as an "unwise" procedure as it carries the risk of serious harm and has no proven benefit. The consumer advocacy news program Marketplace conducted a consumer trial with