GI Bleeding Nursing Guide 2026
⚕️ Medical Disclaimer: This content is for educational purposes only and is intended for licensed healthcare professionals. It does not constitute medical advice and should not replace clinical judgment, facility protocols, or physician orders. Always verify medications, doses, and procedures with your institution's guidelines.
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Upper vs lower GI bleed identification, hemodynamic resuscitation, variceal hemorrhage, endoscopy preparation, and nursing management — including all the NCLEX favorites.
1. GI Bleeding Overview
GI bleeding is classified by location relative to the ligament of Treitz (at the duodenojejunal junction):
| Feature | Upper GI Bleed (UGIB) | Lower GI Bleed (LGIB) |
|---|
| Location | Esophagus, stomach, duodenum (above Treitz) | Jejunum, ileum, colon, rectum (below Treitz) |
| Presentation | Hematemesis, melena, hematochezia (if massive) | Hematochezia, occult blood; melena if right colon |
| BUN/Cr ratio | >20:1 (blood protein absorbed in small bowel → raises BUN) | Normal ratio (blood not absorbed proximally) |
| Common causes | Peptic ulcer disease (most common), varices, Mallory-Weiss tear, esophagitis, AVM, Dieulafoy's lesion | Diverticulosis (most common), hemorrhoids, colorectal cancer, AVMs, ischemic colitis, IBD |
| Diagnostic test | Upper endoscopy (EGD) within 24 hr (12 hr if high risk) | Colonoscopy; CTA angiography if active and rapid |
2. Key Terminology
- Hematemesis: Vomiting bright red blood → active upper GI bleed
- "Coffee ground" emesis: Dark, grainy vomit → upper GI bleed where blood has been in stomach awhile (oxidized hemoglobin)
- Melena: Black, tarry, foul-smelling stool — from digested blood. Requires ≥50–100 mL blood in upper GI. Stains toilet black.
- Hematochezia: Bright red or maroon blood per rectum — usually lower GI. If upper GI bleed is massive (>1 L), can also cause hematochezia.
- Occult blood: Blood not visible to naked eye — detected by guaiac/fecal immunochemical testing (FIT)
3. Common Causes of Upper GI Bleeding
Peptic Ulcer Disease (PUD) — Most Common
Duodenal ulcers most common. H. pylori infection or NSAID use in most cases. Posterior duodenal ulcer can erode the gastroduodenal artery → massive hemorrhage. Signs on endoscopy: spurting vessel = high re-bleeding risk → endoscopic hemostasis.
Esophageal/Gastric Varices
Portal hypertension (cirrhosis, portal vein thrombosis) → blood bypasses liver through collateral vessels → esophageal/gastric varices form. Variceal rupture = massive, life-threatening hemorrhage (mortality 15–25% per episode).
Variceal bleeding management:
- IV octreotide (somatostatin analog) — reduces portal pressure; start BEFORE endoscopy; continue 3–5 days
- Ceftriaxone 1 g IV daily × 7 days (antibiotic prophylaxis — reduces infection risk and re-bleeding in cirrhosis)
- Avoid overtransfusion — target Hgb 7–8 g/dL (keep portal pressure lower)
- Endoscopy (EGD) ASAP for band ligation or sclerotherapy
- Sengstaken-Blakemore tube (or Minnesota tube) for refractory/massive bleeding — balloon tamponade as bridge to definitive treatment
- TIPS (Transjugular Intrahepatic Portosystemic Shunt) if refractory to endoscopic treatment
Mallory-Weiss Tear
Longitudinal mucosal laceration at gastroesophageal junction from forceful vomiting, retching, or coughing. Classic history: alcohol binge → repeated vomiting → then hematemesis. Usually self-limiting; most stop bleeding spontaneously.
4. Severity Assessment
Hemodynamic Stability Classification
| Finding | Mild (Class I) | Moderate (Class II) | Severe (Class III) | Life-Threatening (Class IV) |
|---|
| Blood loss | <15% | 15–30% | 30–40% | >40% |
| HR | Normal | 100–120 | 120–140 | >140 or bradycardia |
| BP | Normal | Normal/orthostatic drop | Low | Very low/undetectable |
| Mental status | Normal | Anxious | Confused | Lethargic/coma |
Orthostatic hypotension: Drop in SBP ≥20 mmHg or DBP ≥10 mmHg when moving from supine to standing. Suggests 15–20% volume depletion. Assess carefully — patient may become syncopal.
Glasgow-Blatchford Score (Outpatient Risk Stratification)
Score 0 = very low risk → outpatient management may be safe. Includes: BUN, Hgb, SBP, HR, melena, syncope, liver disease, heart failure. Score ≥1 = hospitalization needed.
Rockall Score (Re-bleeding/Mortality Risk after Endoscopy)
Pre-endoscopy: age, shock, comorbidities. Post-endoscopy: diagnosis, stigmata of recent hemorrhage (spurting vessel = high risk, clean base = low risk). Score >8 = high mortality risk.
5. Emergency Nursing Management
Initial Response (First 30 Minutes)
- Airway: Position to prevent aspiration — HOB 30–45° or left lateral decubitus. Prepare for intubation if hematemesis is massive or altered mental status (protect airway before endoscopy).
- Access: Two large-bore (16g or larger) peripheral IVs — large-bore for rapid infusion
- Labs: CBC (serial — initial Hgb may be falsely normal before hemodilution), BMP (BUN/Cr ratio), PT/INR (coagulopathy common in cirrhosis), type and crossmatch (order blood EARLY)
- Fluids: IV NS or LR bolus for hemodynamic instability — resuscitate to MAP >65
- Blood products: PRBCs — target Hgb ≥7 g/dL (≥8 if cardiovascular disease). FFP if INR >1.5 and active bleeding. Platelets if <50k with active bleeding.
- NG tube: Insert for UGIB — lavage with room temperature saline to clear stomach for endoscopy visibility; coffee grounds or bloody return → confirms UGIB (though negative NG lavage does NOT rule out UGIB)
- Foley: Monitor UO hourly (goal ≥0.5 mL/kg/hr)
- NPO: Nothing by mouth — prepare for endoscopy
Medications in GI Bleeding
| Drug | Indication | Dose/Notes |
|---|
| Octreotide | Variceal bleeding (reduces portal pressure) | 50 mcg IV bolus then 50 mcg/hr infusion × 3–5 days; start BEFORE endoscopy |
| Pantoprazole (PPI) | Non-variceal UGIB (peptic ulcer) | 80 mg IV bolus then 8 mg/hr infusion × 72 hr post-endoscopy if high-risk ulcer; reduces re-bleeding risk |
| Ceftriaxone | Cirrhosis + variceal bleeding (SBP prophylaxis) | 1 g IV daily × 5–7 days |
| Erythromycin | Prokinetic — clears stomach before endoscopy | 250 mg IV 30–60 min before EGD; improves visualization |
| Tranexamic acid | Considered in some LGIB protocols | Evidence less clear for GI bleeding than trauma; use per protocol |
6. NG Tube in GI Bleeding
Procedure Pearls
- Size 16–18 Fr for adequate lavage
- Confirm placement: x-ray (gold standard) or pH testing before lavage
- Instill 200–300 mL room temperature NS, let dwell 30 seconds, drain; repeat until return clears or remains bloody (then to endoscopy regardless)
- NOT warm water or iced saline (iced saline theoretically reduces coagulation)
- Bloody return confirms UGIB; "coffee ground" confirms recent UGIB; clear or bilious return = no active proximal bleeding (but cannot exclude duodenal source)
- CONTRAINDICATION: Suspected esophageal varices — controversial; place with caution, use smaller tube
NG tube and varices: Historically controversial. Most centers place cautiously in cirrhotic patients — use small tube, lubricate well, do NOT force. The benefit of gastric decompression and prep for endoscopy often outweighs risk of variceal injury from a soft tube.
7. Sengstaken-Blakemore (S-B) Tube
Triple-lumen balloon tamponade tube used for variceal hemorrhage refractory to medical management — BRIDGE to definitive treatment (not standalone treatment).
S-B Tube management (balloon tamponade):
- Usually requires intubation first (airway protection)
- Inflate gastric balloon FIRST with 150–200 mL air → confirm position by x-ray → apply traction
- If still bleeding, inflate esophageal balloon to 30–45 mmHg
- NEVER leave esophageal balloon up >24 hr without planned deflation (ischemia/necrosis)
- Keep scissors at bedside — if airway compromise: cut tube to rapidly deflate
- Monitor: bilateral lung sounds, secretion suctioning from esophageal port, airway pressure
8. Lower GI Bleeding (LGIB) Management
Most LGIB is self-limiting (80% stop spontaneously). Diverticular bleed is most common cause — usually painless, large-volume hematochezia in older patients with a history of diverticulosis.
- Colonoscopy remains the primary diagnostic and therapeutic tool
- CT angiography (CTA) for active brisk bleeding — can localize source and guide IR embolization
- Tagged RBC scan for intermittent or low-rate bleeding (requires 0.1 mL/min bleeding rate to detect)
- IR embolization for vascular causes (AVMs, post-polypectomy bleed) — risk: bowel ischemia
- Surgery for persistent massive bleeding or bowel resection
9. Ongoing Nursing Assessment
| Assessment | Frequency | Watch For |
|---|
| Vital signs + MAP | q15–30 min initially; q1h when stable | Tachycardia, hypotension, falling SpO2 |
| Urine output (Foley) | Hourly | <30 mL/hr = oliguria → poor perfusion |
| Stool description | Each BM | Melena transitioning to normal = improving; bright red persisting = ongoing bleed |
| Emesis description | Each episode | Coffee grounds → bright red = worsening |
| CBC (serial Hgb) | q6–8h acutely | Falling Hgb → ongoing bleed or inadequate transfusion |
| Abdominal assessment | q4h | Increased rigidity, rebound = perforation; bowel sounds |
| Neuro/mental status | q2–4h | In cirrhosis: worsening confusion → hepatic encephalopathy from blood protein load in gut |
NCLEX High-Yield GI Bleeding Points
- Melena = black tarry stool = digested blood = upper GI bleed
- Hematochezia = bright red blood per rectum = usually lower GI; massive upper if >1 L
- BUN/Cr ratio >20:1 = upper GI bleed (blood protein absorbed in small intestine)
- Most common UGIB cause: peptic ulcer disease; most common LGIB: diverticulosis
- Variceal bleed: octreotide + antibiotics (ceftriaxone) + endoscopy
- Sengstaken-Blakemore tube: gastric balloon inflated first; scissors at bedside
- IV access for GI bleeding: 2 large-bore (16g+) peripheral IVs
- NG lavage: clear return ≠ no UGIB (duodenal ulcer may not reflux into stomach)
- Post-EGD high-risk ulcer: PPI infusion 8 mg/hr × 72 hr
- Avoid overtransfusion in varices: target Hgb 7–8 g/dL (higher portal pressure → re-bleed)
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