GI Bleed Nursing Guide 2026: Upper & Lower Gastrointestinal Hemorrhage
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This article was created with AI assistance.
Massive GI hemorrhage is life-threatening. A patient can lose 30% of blood volume before systolic BP drops. Tachycardia may be the ONLY early sign. Act fast.
Upper vs Lower GI Bleed
| Feature | Upper GI Bleed (UGIB) | Lower GI Bleed (LGIB) |
|---|
| Source | Esophagus, stomach, duodenum (proximal to Ligament of Treitz) | Small intestine, colon, rectum (distal) |
| Vomiting blood | Hematemesis (bright red) or coffee-ground emesis | No hematemesis |
| Stool appearance | Melena (black, tarry, foul-smelling) if slow; hematochezia if massive/rapid | Hematochezia (bright red blood per rectum) |
| NG tube output | Blood or coffee grounds on lavage | Clear or bile-colored lavage (helps rule out upper source) |
| Common causes | PUD, esophageal varices, Mallory-Weiss tear, gastritis | Diverticulosis, AVM, IBD, colorectal cancer, hemorrhoids |
| BUN:Creatinine ratio | Often >20:1 (blood digested in upper GI = urea load) | Usually normal ratio |
Coffee-ground emesis = blood that has been in contact with gastric acid (slower bleed). Bright red hematemesis = active, brisk bleeding. Both are UGIB.
Nursing Assessment
Focused History
- Onset and amount of bleeding; color of emesis or stool
- NSAID use (most common cause of peptic ulcer disease)
- Alcohol use (esophageal varices; alcoholic gastritis)
- H. pylori history or prior GI bleed
- Anticoagulant use (warfarin, DOACs, aspirin)
- Prior abdominal surgery; known liver disease (cirrhosis = varices risk)
- Syncope or dizziness (suggests significant volume loss)
Physical Assessment Priorities
- Vital signs: HR, BP (orthostatic if stable), RR, SpO2
- Orthostatic hypotension: SBP drop ≥20 mmHg or HR increase ≥20 bpm when standing = significant volume loss
- Abdomen: Tenderness, rigidity, bowel sounds
- Skin: Pallor, diaphoresis, cap refill, jaundice (liver disease)
- Rectal exam: MD/NP assessment for stool color, hemorrhoids, masses
- Urine output: Foley if hemodynamically unstable; goal ≥0.5 mL/kg/hr
Hemodynamic Monitoring
| Finding | Significance | Action |
|---|
| HR >100 bpm | Early shock; volume depletion | Fluid bolus; notify MD |
| SBP <90 mmHg | Hemodynamic instability | Call MD STAT; rapid IV fluid; prepare for transfusion; may need ICU |
| Postural hypotension | 10–20% blood volume loss | Keep supine; IV access; fluid resuscitation |
| Urine output <30 mL/hr | Hypoperfusion; pre-renal state | Volume assessment; fluid bolus per order |
| Altered mental status | Cerebral hypoperfusion; late shock sign | Emergent intervention; code blue may follow |
Priority Nursing Interventions
- Two large-bore IVs (16–18g): for rapid fluid and blood administration
- Type & Crossmatch: Draw stat; order pRBC units per MD order
- CBC, CMP, coags (PT/INR/aPTT), BUN/Cr, LFTs: Stat labs
- NPO: For potential endoscopy; insert NG tube per order (if UGIB suspected)
- IV access and fluid resuscitation: NS or LR bolus if hemodynamically unstable
- O2 therapy: Maintain SpO2 ≥94%; supplemental O2
- Foley catheter: Monitor UO hourly if hemodynamically compromised
- PPI therapy: IV proton pump inhibitor (pantoprazole 80 mg bolus + drip) for suspected UGIB per order
- Octreotide: For suspected variceal bleed per order (reduces portal pressure)
- Reverse anticoagulation if applicable: vitamin K, FFP, 4-factor PCC, platelets per order
Blood Transfusion in GI Bleed
| Transfusion Trigger | Target | Special Considerations |
|---|
| Hgb <7 g/dL (stable patients) | Hgb 7–8 g/dL | Restrictive strategy shown to improve outcomes vs liberal (TRICC trial) |
| Hgb <8 g/dL (ACS, cardiac history) | Hgb ≥8 g/dL | Higher threshold for cardiac patients |
| Active hemodynamic instability | Transfuse regardless of Hgb level | Do NOT wait for lab result in active massive hemorrhage |
| Cirrhosis/variceal bleed | Target Hgb 7–8; avoid over-transfusion | Over-transfusion increases portal pressure and re-bleeding risk |
1:1:1 massive transfusion protocol (MTP): For massive GI bleed (usually UGIB with esophageal varices or arterial source), MTP activates: 1 unit pRBC : 1 unit FFP : 1 unit platelets. Activation criteria vary by institution.
Endoscopy Preparation
- NPO 6–8 hours (or per GI order) before elective endoscopy; emergent endoscopy may proceed faster
- Erythromycin 250 mg IV 30 min before endoscopy may be ordered (promotes gastric emptying, improving visualization)
- Ensure consent is signed (by MD)
- Have IV sedation medications ready (typically propofol or midazolam + fentanyl)
- Continuous monitoring: SpO2, HR, BP, capnography during procedure
- Have reversal agents available: flumazenil (for benzo) and naloxone (for opioid)
- Post-endoscopy: VS q15 min x1 hr; monitor for re-bleeding; report any new hematemesis or drop in BP
Common Causes by Category
Upper GI Bleed Sources
- Peptic Ulcer Disease (PUD): Most common cause of UGIB; H. pylori or NSAID-related
- Esophageal Varices: Life-threatening; complication of portal hypertension in cirrhosis; high re-bleed rate
- Mallory-Weiss Tear: Longitudinal tear at GEJ from vomiting; often stops spontaneously
- Gastritis/Stress Ulcers: ICU patients; prevent with PPI or H2 blocker
- Dieulafoy Lesion: Rare large submucosal artery; massive bleed with minimal mucosal change
Lower GI Bleed Sources
- Diverticulosis: Most common cause of LGIB; usually painless; often stops spontaneously
- AVM (Angiodysplasia): Elderly patients; recurrent bleed
- IBD (Crohn's/Ulcerative Colitis): Blood with diarrhea, cramping
- Colorectal Cancer: Chronic occult blood loss; iron deficiency anemia
- Internal Hemorrhoids: Bright red blood coating stool; NOT mixed in stool
NCLEX High-Yield Points
- Hematemesis = upper GI bleed; hematochezia = usually lower GI bleed (but can be massive UGIB)
- Melena = black tarry stool = upper GI source (blood digested over hours)
- BUN:Creatinine >20:1 suggests UGIB (protein absorption from digested blood)
- Two large-bore IVs are the first priority in active GI bleed
- Restrictive transfusion (Hgb <7) is preferred except in cardiac patients or hemodynamic instability
- IV PPI + octreotide for suspected variceal/UGIB per order
- Tachycardia may be the ONLY early sign of significant hemorrhage — take it seriously
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