What is the initial diagnostic study of choice for lower gastrointestinal (GI) bleeding (LGIB)?

Updated: Jul 26, 2019
  • Author: Burt Cagir, MD, FACS; Chief Editor: BS Anand, MD  more...
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In most patients with lower gastrointestinal bleeding (LGIB), colonoscopy is the initial diagnostic method of choice. [5, 6, 41] Colonoscopy is successfully used to identify the site of severe LGIB in approximately 74%-82% of patients. [15] In addition to its diagnostic utility, colonoscopy offers the opportunity for therapeutic intervention [4] in the treatment of vascular ectasias, diverticular bleeding, neoplastic lesions, and ulcerative processes. Rapid colonic lavage with GoLYTELY (orally or by nasogastric [NG] tube) clears intraluminal blood, clots, and stool, providing an adequate environment for visualization of the lower GI mucosa and lesions.

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