2022 Guideline Update: Lower GI Bleeds

Acute lower GI bleeding is risk-stratification and hemodynamics first, not a reflex colonoscopy problem. The updated ACG guidance clarifies who can go home, when CTA changes management, and how to handle transfusion, anticoagulant reversal, and antithrombotic restart decisions.

Lower GI Bleed Guideline Pearls

• Oakland score triage: The Oakland Score helps identify low-risk lower GI bleed patients for possible discharge and gives a quantitative footing for admission decisions when the bedside picture is less obvious.
• Restrictive transfusion threshold: Hemoglobin under 7 g/dL is the headline transfusion trigger, but hypotension or ongoing bleeding still calls for immediate IV fluid resuscitation while the rest of the picture comes together.
• Selective anticoagulant reversal: Anticoagulant reversal is reserved for life-threatening bleeding or markedly supratherapeutic warfarin effect, with 4-factor PCC preferred over FFP for faster INR correction.
• CTA over routine CT: CT angiography of the abdomen and pelvis is the preferred study for significant or ongoing hematochezia because active extravasation can directly route the patient to IR. We get into that consultant-facing workflow in the episode.
• No rush to colonoscopy: Inpatient colonoscopy is still recommended for most admitted patients, but emergent scope has not shown better rebleeding or mortality outcomes than a routine inpatient approach.
• Antithrombotic restart decisions: After bleeding control, anticoagulation should usually be resumed because it lowers thromboembolism and mortality, while aspirin and non-aspirin antiplatelet decisions depend on the indication for use.

References:

1. Sengupta N, et al. Management of Patients With Acute Lower Gastrointestinal Bleeding: An Updated ACG Guideline. Am J Gastroenterol. 2023;118(2):208-231.PMID: 36735555