Since the original reports using dilute positive enteral contrast, CT enteroclysis has evolved into two distinct modifications, one using neutral enteral contrast with intravenous (iv) contrast enhancement and the other using positive enteral contrast [16-19]. Each modification has technical differences, and these will be described separately. For both modifications, bowel preparation includes a low residue diet, ample fluids, a laxative on the day prior to the examination, and nothing by mouth on the day of the examination. As with barium enteroclysis, patients using a 13 F enteroclysis catheter (MEC Cook Inc. Bloomington IN) are given the option to have conscious sedation, as has been previously suggested .
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