On the Bleeding Edge: Mastering GI Emergencies and Inpatient GI Consultation (Live and Virtual)| September 2026-ASGE LGIB Endoscopy

ASGE LGIB Endoscopy

Pdf Summary

The ASGE guideline reviews how endoscopy should be used in acute lower gastrointestinal bleeding (LGIB), using the GRADE framework and available evidence.

Key points:
- <strong>Initial assessment:</strong> Patients should be risk-stratified using history, exam, hemodynamic status, and clinical judgment. Risk scores may help identify low-risk patients, but should not replace clinician judgment.
- <strong>Resuscitation:</strong> Hemodynamically unstable patients should receive prompt IV fluids, monitoring, and blood transfusion when indicated.
- <strong>Rule out upper GI bleeding:</strong> <strong>Upper endoscopy is recommended for patients with hematochezia and initial hemodynamic instability</strong> unless imaging already confirms a lower GI source.
- <strong>Initial diagnostic test:</strong> For acute LGIB, <strong>either colonoscopy or CT angiography is acceptable</strong>. Colonoscopy is preferred in stable patients; CT angiography is favored in ongoing instability or when bowel prep is not tolerated.
- <strong>Timing of colonoscopy:</strong> Colonoscopy should be done <strong>when the patient is stable enough and can tolerate full bowel preparation</strong>. Evidence does not show clear outcome benefit for urgent colonoscopy, though it may shorten hospital stay.
- <strong>Preparation:</strong> <strong>Full bowel preparation is recommended</strong> before colonoscopy except in strongly suspected distal or known iatrogenic bleeding.
- <strong>Diverticular bleeding:</strong>  
  - <strong>Band ligation or clipping</strong> may be used depending on lesion location and expertise.  
  - Band ligation is suggested for <strong>right-sided/proximal lesions</strong> when feasible.  
  - If clipping is used, <strong>direct clipping is preferred over indirect clipping</strong>.
- <strong>Other lesion types:</strong>  
  - <strong>Postresection bleeding:</strong> clip or thermal coagulation; hemostatic powder may be adjunctive.  
  - <strong>Vascular lesions / radiation proctopathy:</strong> argon plasma coagulation.  
  - <strong>Malignant bleeding:</strong> hemostatic powder or Nd:YAG laser for temporary control.
- <strong>Surgery:</strong> Reserved as a <strong>last resort</strong> when endoscopic and radiologic therapy fail or are not possible.

The guideline also highlights gaps in evidence and calls for more randomized trials and comparative studies.

Keywords

acute lower gastrointestinal bleeding

ASGE guideline

endoscopy

colonoscopy

CT angiography

hemodynamic instability

upper endoscopy

diverticular bleeding

hemostatic therapy

bowel preparation