How is three-phase helical CT scanning performed in the evaluation of lower gastrointestinal (GI) bleeding (LGIB)?

Updated: Jul 26, 2019
  • Author: Burt Cagir, MD, FACS; Chief Editor: BS Anand, MD  more...
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Three-phase helical CT scanning should be performed using intravenous (IV) contrast medium. Water can be used as an oral contrast agent in the workup of patients who are actively bleeding. Helical CT scanning as a diagnostic tool for acute lower GI bleeding (LGIB) is a safe, convenient, and an accurate diagnostic tool relative to mesenteric angiography and colonoscopy. [31]

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