The provider takes X–rays of the small intestine after infusing high–density barium and air (double–contrast) through a tube passed through the nose or mouth, down the throat, and into the duodenum or small intestine. The service also includes a scout film taken before the contrast is instilled, if performed, and sequential X–ray exposures after the instillation of the contrast. Glucagon, if administered, is usually given by IV infusion prior to the procedure.
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