American Society for Gastrointestinal Endoscopy guideline on the role of endoscopy in acute lower gastrointestinal bleeding.

This document was developed using the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) framework.

In the broad context of acute lower GI bleeding, this guideline addresses the use of colonoscopy versus CT +/- angiography as the first modality, urgent versus nonurgent colonoscopy, and prepped versus unprepped colonoscopy.

For diverticular bleeding in particular, this guideline assesses endoscopic band ligation versus clipping and direct clipping of the bleeding site or vessel versus indirect clip closure of the diverticulum.

All of these clinical questions were answered using the GRADE framework.