How is the lower gastrointestinal (GI) bleeding site localized?

Updated: Jul 26, 2019
  • Author: Burt Cagir, MD, FACS; Chief Editor: BS Anand, MD  more...
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In about 10% of patients presenting with lower gastrointestinal bleeding (LGIB), the source of bleeding is from the upper gastrointestinal (GI) tract. Some patients with LGIB should have a nasogastric (NG) tube placed, and if the aspirate or lavage does not show any blood or coffee ground–appearing material but does show bile, bleeding originating from the upper GI tract is unlikely. In case of high suspicion, obtain an esophagogastroduodenoscopy (EGD) evaluation (see Esophagogastroduodenoscopy).

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