What is the recommended management of an acute gastrointestinal bleed?

Management of Acute Gastrointestinal Bleeding

Acute GI bleeding requires immediate risk stratification, hemodynamic resuscitation with restrictive transfusion thresholds (Hb <7 g/dL for most patients, <8 g/dL for cardiovascular disease), and early endoscopy within 24 hours—not urgent (<12 hours)—as the cornerstone of diagnosis and treatment. 1

Initial Assessment and Risk Stratification

Upper GI Bleeding (UGIB)

• Use the Glasgow-Blatchford Score (GBS) for pre-endoscopy risk stratification—patients with GBS ≤1 are at very low risk and can be safely managed as outpatients with outpatient endoscopy 2
• Avoid using AIMS65 score to identify low-risk patients, as it lacks sufficient evidence for safe discharge decisions 1
• Consider nasogastric tube placement in selected patients for prognostic value, though not routinely required 1

Lower GI Bleeding (LGIB)

• Stratify patients as unstable (shock index >1) or stable, then categorize stable bleeds as major or minor using the Oakland score 1
• Patients with Oakland score ≤8 points and no other admission indications can be discharged for urgent outpatient investigation 1, 3
• Major bleeds require hospital admission for colonoscopy 1

Resuscitation and Transfusion Strategy

Blood Transfusion Thresholds

• For patients WITHOUT cardiovascular disease: transfuse at Hb <7 g/dL (70 g/L), targeting 7-9 g/dL post-transfusion 1, 3
• For patients WITH cardiovascular disease: transfuse at Hb <8 g/dL (80 g/L), targeting ≥10 g/dL post-transfusion 1, 3

This restrictive strategy is critical—liberal transfusion does not improve outcomes and may worsen mortality in stable patients 1.

Pre-Endoscopic Pharmacotherapy

Proton Pump Inhibitors (PPIs)

• Pre-endoscopic PPI therapy may downstage endoscopic lesions and decrease need for intervention, but should not delay endoscopy 1
• After endoscopic hemostasis, administer high-dose PPI: IV bolus 80 mg followed by continuous infusion 8 mg/hour for 72 hours 1, 2
• Alternative regimens: twice-daily IV bolus or oral PPI formulations are acceptable 2

Prokinetic Agents

• Do NOT routinely use promotility agents (e.g., erythromycin) before endoscopy—insufficient evidence for routine use 1

Tranexamic Acid

• Do NOT use tranexamic acid in acute GI bleeding 4

Endoscopic Management

Timing of Endoscopy

Upper GI Bleeding

• Perform early endoscopy within 24 hours of presentation after hemodynamic resuscitation 1, 2
• Do NOT perform urgent endoscopy (<12 hours) routinely—it does not improve outcomes compared to early endoscopy 2
• For patients on anticoagulants (warfarin, DOACs), do NOT delay endoscopy with or without reversal 1

Lower GI Bleeding

• For hemodynamically unstable patients or shock index >1 after resuscitation: perform CT angiography first to localize bleeding before endoscopic or radiological therapy 1, 3
• If CT angiography is negative in unstable LGIB, perform upper endoscopy immediately—hemodynamic instability may indicate upper GI source 1
• For stable major LGIB: perform colonoscopy during hospital stay—no evidence that urgent colonoscopy improves outcomes 3

Endoscopic Hemostatic Techniques for UGIB

High-Risk Stigmata (Active Bleeding or Visible Vessel)

• Use combination therapy: epinephrine injection PLUS a second modality (contact thermal, mechanical therapy, or sclerosant injection) 1, 2
• Epinephrine injection alone is suboptimal—always combine with another method 1
• No single thermal coaptive method is superior to another 1

Adherent Clots

• Attempt targeted irrigation to dislodge clot, then treat underlying lesion 1
• Endoscopic therapy may be considered, though intensive PPI therapy alone may be sufficient—this remains controversial 1

Low-Risk Stigmata

• Do NOT perform endoscopic therapy for clean-based ulcers or flat pigmented spots 1

Refractory or Recurrent Bleeding

• For persistent bleeding refractory to standard hemostasis: consider topical hemostatic spray/powder or cap-mounted (over-the-scope) clips 2
• For recurrent peptic ulcer hemorrhage: attempt second endoscopy with cap-mounted clip 2
• If second endoscopic attempt fails: proceed to transcatheter angiographic embolization (TAE) 2
• Surgery is indicated only when TAE unavailable or after failed TAE 2
• For LGIB with positive CTA: perform catheter angiography with embolization within 60 minutes in centers with 24/7 interventional radiology 1
• Do NOT proceed to emergency laparotomy unless all radiological and endoscopic options exhausted 1

Anticoagulation and Antiplatelet Management

Warfarin

• Interrupt warfarin at presentation 1
• For unstable hemorrhage: reverse with prothrombin complex concentrate and vitamin K 1, 3
• For low thrombotic risk: restart warfarin at 7 days post-hemorrhage 1

Direct Oral Anticoagulants (DOACs)

• Temporarily withhold DOACs at presentation 3
• Resume anticoagulation as soon as bleeding controlled, preferably within or soon after 7 days, based on thromboembolic risk 2
• Consider rapid onset of DOACs vs warfarin when timing resumption 2

Antiplatelet Therapy

Aspirin Monotherapy

• For secondary cardiovascular prevention: do NOT interrupt aspirin 1, 2, 3
• If interrupted, restart within 3-5 days, preferably as soon as hemostasis achieved 1, 2, 3
• For primary prevention only: permanently discontinue aspirin 1

Dual Antiplatelet Therapy (DAPT)

• Do NOT routinely discontinue DAPT before cardiology consultation 3
• Continue aspirin; P2Y12 inhibitor can be continued or temporarily interrupted based on bleeding severity and ischemic risk 1, 3
• If interrupted, restart P2Y12 inhibitor within 5 days if still indicated 3

Venous Thromboembolism Prophylaxis

• Consider low molecular weight heparin at 48 hours post-hemorrhage for VTE prophylaxis 1
• For high thrombotic risk (prosthetic metal heart valve, recent VTE <3 months): individualize timing with multidisciplinary input 1

Post-Endoscopic Management

• Initiate early enteral feeding for all UGIB patients 4
• Selected low-risk patients with ulcer bleeding can be discharged promptly after endoscopy based on clinical and endoscopic criteria 1
• Continue high-dose PPI for 72 hours post-hemostasis in high-risk peptic ulcer disease 1, 2
• For high-risk PUD with rebleeding: evaluate initially with repeat endoscopy 4

Common Pitfalls

• Avoid liberal transfusion strategies—they worsen outcomes in stable patients without cardiovascular disease 1
• Do not rush to urgent (<12 hours) endoscopy—early (within 24 hours) is sufficient and safer 2
• Never use epinephrine injection alone—always combine with thermal or mechanical therapy 1, 2
• Do not delay endoscopy in anticoagulated patients—proceed with or without reversal based on stability 1
• Recognize that LGIB with hemodynamic instability may be upper GI source—perform upper endoscopy if CTA negative 1