GI bleed nursing reference: assessment and interventions

Gastrointestinal bleeding ranges from a slow ooze discovered incidentally on lab work to a massive hemorrhage with hemodynamic collapse within minutes. Upper GI bleeding — defined as bleeding proximal to the ligament of Treitz — has an incidence of approximately 67 per 100,000 population per year with in-hospital mortality around 10%. Lower GI bleeding (distal to the ligament of Treitz) affects roughly 36 per 100,000 per year with mortality below 4%. Nurses are usually the first to recognize the early warning signs: tachycardia, postural hypotension, a change in stool character, or fresh blood in the NG aspirate. Catching these signals early and acting on them precisely is what this reference is designed to support.

This page covers upper and lower GI bleed pathophysiology, clinical presentations, systematic assessment, priority interventions, risk stratification, pre-procedure care, complications, and NCLEX-focused review points. For the underlying pathophysiology of ulcers, see the peptic ulcer disease nursing reference. For variceal bleeding in the context of portal hypertension, see the cirrhosis nursing reference.

Quick reference	Upper GI bleed	Lower GI bleed
Anatomic boundary	Proximal to ligament of Treitz (esophagus, stomach, duodenum)	Distal to ligament of Treitz (jejunum, ileum, colon, rectum)
Most common cause	Peptic ulcer disease (~40%)	Diverticulosis
Typical stool	Melena (black, tarry, foul-smelling)	Hematochezia (bright red or maroon blood)
Emesis	Hematemesis or coffee-ground emesis	Absent (unless massive bleed)
BUN:Cr ratio	>20:1 (digested blood raises urea absorption)	Usually normal
Primary diagnostic tool	EGD (esophagogastroduodenoscopy)	Colonoscopy
In-hospital mortality	~10%	<4%
Risk stratification score	Glasgow-Blatchford or AIMS65	Oakland score

Upper GI bleeding

Upper GI bleeding originates proximal to the ligament of Treitz — the suspensory ligament anchoring the duodenojejunal junction. The three primary anatomic sources are the esophagus, stomach, and duodenum. Upper GI bleeds account for approximately two-thirds of all GI hemorrhage cases and carry higher mortality than lower GI bleeds because the vessels supplying these structures are large-caliber.

Causes of upper GI bleeding

Peptic ulcer disease (PUD) is the most common cause, responsible for approximately 40% of upper GI bleeds. Gastric acid erodes through the mucosa into submucosal blood vessels. Posterior duodenal ulcers carry the highest hemorrhage risk because the ulcer erodes directly toward the gastroduodenal artery — a complication that produces massive, arterial hemorrhage. See the peptic ulcer disease nursing reference for full PUD pathophysiology and management.

Other causes in order of clinical frequency:

Esophageal varices — dilated submucosal veins from portal hypertension. Variceal bleeds carry 15–25% mortality per episode and require a distinct management pathway (octreotide, antibiotics, banding). Cirrhosis is the underlying driver in the majority of cases. See the cirrhosis nursing reference for portal hypertension pathophysiology.
Mallory-Weiss tear — a longitudinal mucosal laceration at the gastroesophageal junction caused by forceful, repeated retching or vomiting. Classic history: the patient vomited multiple times without blood, then developed hematemesis. Usually self-limiting and stops with conservative management.
Erosive gastritis/esophagitis — mucosal inflammation from NSAIDs, alcohol, or critical illness (stress ulcers). High-risk ICU patients (mechanical ventilation, coagulopathy) receive prophylactic PPIs or H2-blockers to prevent stress ulceration.
Dieulafoy lesion — an abnormally large submucosal artery that erodes through the mucosa without forming a visible ulcer. Rare but produces sudden, massive bleeding with no prior symptoms. Diagnosis requires endoscopy in the active bleeding phase.
Gastric antral vascular ectasia (GAVE) — also called watermelon stomach because of its endoscopic appearance of red stripes radiating from the pylorus. Common in cirrhosis and autoimmune conditions. Causes slow, chronic blood loss rather than acute hemorrhage.
Aortoenteric fistula — an abnormal tract between the aorta and the duodenum, almost always a late complication of prior aortic graft surgery. The classic presentation is a small “herald bleed” followed by catastrophic hemorrhage. Any patient with prior aortic surgery presenting with upper GI bleeding should be evaluated for fistula urgently.
Malignancy — gastric and esophageal tumors with vascular erosion. Usually presents with occult or chronic slow bleeding rather than acute hemorrhage.

Presentation of upper GI bleeding

The hallmark presentations:

Hematemesis — vomiting of blood. Bright red hematemesis indicates active, brisk bleeding with minimal contact time in the stomach. Coffee-ground emesis (dark, granular, resembling coffee grounds) indicates slower bleeding where gastric acid has oxidized hemoglobin to hematin — the bleeding is ongoing but less acute.
Melena — black, tarry, malodorous stools. As little as 50–100 mL of blood entering the upper GI tract can produce melena. The dark color results from bacterial and enzymatic degradation of hemoglobin during 8+ hours of intestinal transit.
Hematochezia from an upper source — bright red blood per rectum indicates a massive upper GI bleed (typically >1,000 mL) moving so rapidly through the GI tract that there is no time for digestion. This presentation carries significantly higher mortality than typical melena and mandates immediate aggressive resuscitation.

Hemodynamic changes reflect the volume of blood lost:

<750 mL loss (<15% blood volume): resting tachycardia, mild anxiety — blood pressure may still be normal supine
750–1,500 mL loss (15–30%): orthostatic hypotension appears, tachycardia >100 bpm, anxiety and restlessness
1,500–2,000 mL loss (30–40%): supine hypotension, tachycardia >120 bpm, altered mental status, cool pale skin
>2,000 mL loss (>40%): severe hypotension, lethargy or unresponsiveness, absent peripheral pulses — hemorrhagic shock

Lower GI bleeding

Lower GI bleeding originates distal to the ligament of Treitz. It accounts for approximately one-third of GI hemorrhage cases. Most episodes (80–85%) are self-limiting, though the 15–20% that continue bleeding or cause hemodynamic instability require urgent intervention.

Causes of lower GI bleeding

Diverticulosis is the most common cause in adults over 40. Diverticula form at points where the vasa recta (end-arterioles) penetrate the colonic wall — these are anatomically weak spots. When an artery within a diverticulum ruptures, the result is brisk, painless arterial bleeding. Painlessness is a key clinical feature that distinguishes diverticular bleeding from ischemic colitis or IBD.

Additional causes:

Angiodysplasia (arteriovenous malformations) — abnormal, thin-walled dilated vessels in the colonic mucosa. The most common cause of lower GI bleeding in patients over 65. Associated with Heyde syndrome (concurrent aortic stenosis) and chronic kidney disease. Tends to cause recurrent, intermittent episodes.
Colorectal cancer — tumor erosion into blood vessels. Typically causes occult or slow, chronic bleeding; occasionally presents as acute hematochezia. Any patient with unexplained lower GI bleeding and risk factors (age >50, family history, change in bowel habits) warrants colonoscopy.
Inflammatory bowel disease — both Crohn’s disease and ulcerative colitis cause mucosal ulceration and bleeding. IBD bleeding is typically associated with diarrhea, cramping, and urgency. See the IBD nursing reference for full detail.
Ischemic colitis — mucosal ischemia from reduced colonic blood flow, most often at the “watershed” zones (splenic flexure, rectosigmoid junction) where two arterial territories meet. Classic presentation: sudden cramping left lower quadrant pain followed by passage of maroon or bloody stool. Common in elderly patients with atherosclerosis.
Hemorrhoids and anal fissures — the most common cause of visible rectal bleeding in adults. Bleeding is typically bright red, small volume, and associated with the bowel movement (on toilet paper or dripping into the bowl). These must be distinguished from more proximal pathology.
Post-polypectomy bleeding — delayed hemorrhage occurring 5–14 days after colonoscopic polyp removal when the eschar falls off the cauterized vessel base.
Meckel’s diverticulum — a true diverticulum of the ileum, typically presenting as painless lower GI bleeding in younger patients (under 30). Contains ectopic gastric mucosa that produces acid, ulcerating the adjacent ileal mucosa.

Presentation of lower GI bleeding

The typical presentation is hematochezia — bright red or maroon blood per rectum. Blood color provides localization clues:

Bright red blood suggests a distal sigmoid or rectal source (minimal transit time)
Maroon stools suggest a proximal colonic or distal small bowel source (longer transit, partial degradation)
Melena can occur with proximal small bowel bleeding if transit is slow enough for degradation — this overlaps with upper GI bleed presentations

Most lower GI bleeds are painless (diverticular, angiodysplasia). Pain with bleeding raises concern for ischemic colitis, IBD, or infectious colitis. Patients requiring more than 2 units of packed red blood cells, who are hemodynamically unstable, or who have ongoing visible hemorrhage need urgent colonoscopy or CT angiography.

Nursing assessment

Systematic, serial assessment is the foundation of GI bleed management. Hemodynamic status can deteriorate rapidly, and the nurse is typically the first to detect early warning signs.

Vital signs and hemodynamic monitoring

Heart rate: tachycardia is the earliest hemodynamic response to hemorrhage. A rate >100 bpm in any GI bleed patient warrants immediate escalation. Critically, beta-blockers (commonly prescribed for cirrhotic patients on propranolol for variceal prophylaxis) can mask tachycardia — never assume hemodynamic stability based on a normal heart rate alone in a beta-blocked patient.
Orthostatic blood pressure: check for orthostatic hypotension — a drop of ≥20 mmHg systolic or ≥10 mmHg diastolic when the patient moves from supine to standing (or sitting). This indicates approximately 15% blood volume loss and frequently precedes any drop in supine blood pressure. This is a high-yield NCLEX finding.
Respiratory rate and SpO2: tachypnea reflects compensatory response to reduced oxygen-carrying capacity. Monitor closely for aspiration risk in patients with active hematemesis or altered mental status.
Temperature: fever in a GI bleed patient raises concern for bacterial translocation through a compromised gut barrier — a mechanism that leads to sepsis. Cirrhotic patients are particularly susceptible.
Urine output: insert a Foley catheter for continuous monitoring. Target ≥0.5 mL/kg/hr as evidence of adequate renal perfusion.

Stool assessment

Document every stool for color, consistency, and estimated volume. Record the time between stools to assess ongoing loss rate.

Melena: black, tarry, foul-smelling — upper GI or proximal lower GI source
Hematochezia: bright red or maroon blood — lower GI source (or massive upper GI bleed)
Coffee-ground output from NG tube: indicates partially digested blood in the stomach — the bleed is ongoing but not brisk

A change from melena to hematochezia signals rebleeding or acceleration of hemorrhage and requires immediate reassessment and escalation.

Abdominal assessment

Inspection: abdominal distension, visible peristalsis, spider angiomata or caput medusae on the abdominal wall (signs of portal hypertension and variceal risk)
Auscultation: hyperactive bowel sounds suggest blood in the GI tract (blood acts as a cathartic). Absent bowel sounds with tenderness raise concern for perforation.
Palpation: tenderness, guarding, rigidity. A rigid, board-like abdomen with rebound tenderness indicates peritoneal contamination — this is a surgical emergency. Light percussion for ascites (shifting dullness) suggests cirrhosis with portal hypertension.

Nasogastric lavage

NG tube placement and lavage can help confirm an upper GI source when the presentation is ambiguous. Key interpretations:

Bright red blood on aspiration: confirms active upper GI bleeding
Coffee-ground material on aspiration: confirms upper GI source with slower bleeding
Clear or bilious aspirate: does not rule out upper GI bleeding (a negative NG lavage has a false-negative rate of approximately 10–15% for upper GI bleed, because a post-pyloric source may not reflux)
No bile on aspiration: the NG tube may not have passed the pylorus — the negative result cannot exclude upper GI pathology

Lab monitoring

Draw labs on arrival and repeat every 4–6 hours during active bleeding. Refer to the nursing lab values cheat sheet for normal ranges.

Lab test	Clinical significance in GI bleed	Key threshold / action
Hemoglobin / Hematocrit	Serial H&H tracks ongoing blood loss. Initial values may be deceptively normal in acute hemorrhage — hemodilution takes 24–72 hours to equilibrate. Do not rely on a single normal H&H to rule out significant acute bleeding.	Transfusion trigger: Hgb <7 g/dL (stable); <8 g/dL in cardiovascular disease
BUN and creatinine	BUN:Cr ratio >20:1 strongly suggests an upper GI source. Digested blood protein is absorbed in the small bowel, raising BUN disproportionately to creatinine. Also monitors for hypovolemic AKI.	Normal BUN:Cr 10–20:1; ratio >20:1 = suspect upper source
PT/INR	Identifies coagulopathy from liver disease or anticoagulant therapy. Elevated INR worsens ongoing hemorrhage and requires reversal before or during endoscopy.	INR >2: consider prothrombin complex concentrate (PCC)
Platelet count	Thrombocytopenia from cirrhotic hypersplenism or DIC impairs platelet plug formation. Platelet dysfunction (from uremia or NSAID use) may coexist with a normal count.	Transfuse platelets if <50,000/µL with active bleeding
Type and screen / crossmatch	Essential for blood product preparation. Send immediately — do not wait for hemodynamic instability. At least 2 units PRBCs should be available before any patient with active significant GI bleed goes to endoscopy.	Order on arrival; crossmatch if transfusion anticipated
Serum lactate	Elevated lactate indicates tissue hypoperfusion from hemorrhagic shock. A rising lactate despite crystalloid resuscitation signals inadequate volume replacement or ongoing hemorrhage.	>2 mmol/L: concerning; >4 mmol/L: high mortality risk — escalate urgently
Liver function tests + albumin	Elevated bilirubin, elevated AST/ALT, and low albumin suggest cirrhosis — identifies patients who need octreotide, antibiotic prophylaxis, and highest-acuity monitoring.	Low albumin (<3 g/dL) is a component of the AIMS65 mortality score
aPTT	Elevated in patients on heparin or with intrinsic coagulopathy. If aPTT is supratherapeutic in a bleeding patient on heparin, hold the heparin and consider protamine reversal.	Supratherapeutic aPTT on heparin: hold drug, consider protamine sulfate

Nursing interventions

When a patient presents with GI bleeding, systematic prioritization prevents critical steps from being missed. The following table covers the priority interventions in order of urgency.

Intervention	Rationale	Priority
Establish two large-bore peripheral IVs (18-gauge minimum; 16-gauge preferred)	Large-bore access is required for rapid crystalloid infusion and blood product delivery. IV flow rate is proportional to the fourth power of catheter radius (Poiseuille's law) — a 16-gauge catheter delivers fluid more than twice as fast as an 18-gauge. A central line (introducer sheath) provides even higher flow rates when peripheral access is inadequate.	Immediate — first action
Place patient NPO	Endoscopy is the primary diagnostic and therapeutic intervention for most GI bleeds. An empty stomach reduces aspiration risk during procedural sedation. NPO status must be confirmed and documented before any sedation is administered.	Immediate
Initiate crystalloid resuscitation	Normal saline or lactated Ringer's restores intravascular volume while blood products are prepared. Avoid over-resuscitation with crystalloid in variceal bleeding — it can worsen portal pressure and precipitate rebleeding. Use enough to maintain hemodynamic stability; transfuse blood products early.	Immediate
Insert Foley catheter	Continuous urine output monitoring provides a reliable, real-time marker of renal perfusion. Target output ≥0.5 mL/kg/hr. A falling urine output despite IV fluids signals hemorrhagic shock with inadequate perfusion.	Immediate
Initiate continuous cardiac monitoring	Tachycardia is the earliest hemodynamic indicator of blood loss. Continuous monitoring detects dysrhythmias that may accompany hypoxia, electrolyte shifts from massive transfusion, or underlying cardiac comorbidities.	Immediate
Administer IV proton pump inhibitor (pantoprazole)	An 80 mg IV bolus followed by 8 mg/hr continuous infusion raises gastric pH above 6, stabilizing clot formation at the ulcer base and reducing rebleeding risk. First-line pharmacotherapy for all suspected upper GI bleeds. Start before endoscopic confirmation — do not wait for diagnosis.	High — upper GI bleed
Administer octreotide for suspected variceal bleeding	Octreotide (somatostatin analog) reduces splanchnic blood flow and lowers portal pressure. Standard dosing: 50 mcg IV bolus, then 50 mcg/hr continuous infusion for 3–5 days. Start immediately when variceal bleeding is suspected — do not wait for endoscopic confirmation. Unlike vasopressin, octreotide does not require concurrent nitroglycerin.	High — suspected varices
Administer IV antibiotic prophylaxis (ceftriaxone) in cirrhotic patients	GI bleeding dramatically increases bacterial translocation through the compromised cirrhotic gut barrier. Infection rates in untreated cirrhotic GI bleed patients reach 35–66%. Ceftriaxone 1 g IV daily for 7 days reduces infection, rebleeding, and mortality. This is a mandatory intervention in cirrhosis — not optional.	High — cirrhotic patients
Administer packed red blood cells (PRBCs)	Initiate when hemoglobin falls below 7 g/dL in stable patients, or 8 g/dL in those with cardiovascular disease. A restrictive transfusion strategy (Hgb threshold 7 g/dL) has demonstrated lower rebleeding rates and better survival compared to a liberal strategy (9 g/dL) — transfusing to a higher target in variceal bleeding worsens portal pressure. Monitor hemoglobin response after each unit and reassess.	High — active blood loss
Activate massive transfusion protocol (MTP) if indicated	For patients with hemodynamic instability despite initial resuscitation, or projected blood loss >1 blood volume (~70 mL/kg). MTP delivers PRBCs, fresh frozen plasma (FFP), and platelets in a balanced 1:1:1 ratio to prevent dilutional coagulopathy. Notify the blood bank early — MTP activation requires advance preparation.	High — hemorrhagic shock
Reverse anticoagulation	Anticoagulated patients with active GI bleeding require urgent reversal. Warfarin → four-factor prothrombin complex concentrate (PCC); this is preferred over FFP alone due to faster INR correction. Heparin → protamine sulfate. Dabigatran → idarucizumab. Rivaroxaban or apixaban → andexanet alfa. Know the drug-reversal agent pairing — this is high-yield NCLEX content.	High — anticoagulated patients
Position head of bed at 30–45 degrees; prepare for intubation if airway at risk	Elevation reduces aspiration risk in patients with active hematemesis. Any patient with altered mental status, inability to protect their airway, or anticipated massive bleeding before EGD should be intubated before endoscopy. Communicate airway concerns to the team early — do not wait for a deterioration event.	High — hematemesis or altered mentation
Serial stool and emesis assessment	Document color, volume, and character with every episode. A change from melena to hematochezia indicates acceleration of bleeding. A change from hematochezia to formed brown stool indicates resolution. Use a consistent documentation template so the healthcare team can track the bleeding trajectory from nursing notes.	Ongoing throughout admission
Patient and family education	Explain the procedure plan, NPO rationale, and bleeding precautions. Instruct the patient to call for assistance before getting out of bed (fall risk from orthostatic hypotension). Educate on avoiding NSAIDs and alcohol post-discharge. Ensure patient understands return precautions: black tarry stools, vomiting blood, dizziness on standing.	As condition allows

Risk stratification

Risk scores are used to determine urgency of endoscopy, need for hospitalization, and likelihood of adverse outcomes. Nurses encounter these scores during triage and handoff.

Glasgow-Blatchford Score (GBS) — upper GI bleed

Used pre-endoscopy to determine whether a patient needs inpatient management or can safely undergo outpatient endoscopy. Variables: BUN level, hemoglobin, systolic BP, heart rate, presence of melena, syncope, hepatic disease, and heart failure.

Score 0: very low risk — outpatient endoscopy within 24 hours may be appropriate
Score 1–6: intermediate risk — inpatient endoscopy within 24 hours
Score ≥7: high risk — urgent inpatient endoscopy, ICU-level monitoring likely needed

The GBS has high sensitivity for identifying low-risk patients who can be managed safely without hospitalization — it is the preferred pre-endoscopy score.

AIMS65 Score — upper GI bleed mortality

AIMS65 predicts in-hospital mortality and guides resource allocation. Each letter represents one point:

A — Albumin <3 g/dL
I — INR >1.5
M — altered Mental status (GCS <14, confusion, somnolence)
S — Systolic BP <90 mmHg
65 — age ≥65 years

Score 0–1: low risk (mortality <1%). Score 2: ~3% mortality. Score 3: ~9% mortality. Score 4–5: mortality approaches 25%. Higher AIMS65 scores warrant early ICU or step-down placement, gastroenterology and surgery co-management, and proactive family communication about severity.

Rockall Score — upper GI bleed rebleeding

The Rockall Score has a pre-endoscopy component (age, comorbidities, hemodynamics) and a post-endoscopy component that adds endoscopic findings (source of bleeding, stigmata of hemorrhage). It predicts rebleeding risk and 30-day mortality. Unlike the GBS, it requires endoscopic data for the full score. The combined score ≥8 carries 40%+ rebleeding risk.

Oakland Score — lower GI bleed

The Oakland Score predicts safe discharge for lower GI bleed patients without further intervention. Variables include: age, sex, previous lower GI bleed admission, digital rectal exam findings, heart rate, systolic BP, and hemoglobin. Score ≤8 identifies patients appropriate for early discharge with outpatient colonoscopy. Higher scores indicate need for inpatient observation and urgent colonoscopy.

Pre-procedure nursing care

Most GI bleed patients proceed to endoscopy (EGD or colonoscopy) within hours of presentation. Pre-procedure nursing preparation directly affects procedure safety and quality.

Preparation for EGD (upper GI bleed)

Confirm NPO status: document the time of last oral intake. Solids require 6 hours of fasting; clear liquids require 2 hours. If the patient ate recently and has ongoing hematemesis, intubation before EGD may be required.
Erythromycin pre-medication: IV erythromycin 250 mg given 30–90 minutes before EGD accelerates gastric emptying by stimulating motilin receptors — it clears blood and clots from the stomach, improving endoscopic visualization. Verify the order and allergies (erythromycin is a macrolide antibiotic; cross-reactivity with azithromycin is possible).
IV access verification: confirm both large-bore IVs are patent and functional. Endoscopy teams will need IV access for sedation.
Consent: ensure written informed consent is obtained. If the patient has altered mental status, identify the healthcare proxy or surrogate decision-maker.
Airway preparation: for patients with ongoing hematemesis, altered mental status, or a GBS ≥7, anticipate potential intubation before sedation. Have suction readily available at the bedside.
Blood products available: confirm that typed and crossmatched blood is available in the blood bank before the patient is transported to the endoscopy suite.
Vital sign baseline: document a full set of vitals immediately before transport. Communicate any trend changes (rising heart rate, falling BP) to the endoscopy team before the procedure begins.

Preparation for colonoscopy (lower GI bleed)

Bowel preparation: most lower GI bleeds require a rapid purge preparation (polyethylene glycol solution, typically 4–6 liters over 2–4 hours) to clear stool and blood from the colon. Active, brisk lower GI bleeding may require CT angiography first if the patient is too unstable for bowel prep.
Monitor for vasovagal responses: bowel prep causes large fluid shifts and stimulates vagal tone — monitor heart rate and blood pressure during prep administration.
IV access and labs: same requirements as EGD. Ensure a type and crossmatch is current.
Electrolyte monitoring: large-volume bowel prep can cause electrolyte shifts. Monitor sodium, potassium, and phosphate — particularly in patients with renal impairment.

Complications

GI bleeding carries several serious complications beyond the initial hemorrhage. Recognizing and preventing these complications is a core nursing responsibility.

Hemorrhagic shock

The most immediately life-threatening complication. Progressive blood loss depletes intravascular volume, reducing venous return and cardiac output. The compensatory response — tachycardia, peripheral vasoconstriction, increased respiratory rate — can maintain blood pressure temporarily. When compensation fails, blood pressure falls, perfusion drops below the threshold for aerobic metabolism, and lactic acidosis develops. Hemorrhagic shock progresses from Class I through Class IV with worsening hemodynamics at each stage. Massive transfusion protocol activation, surgical consultation, and interventional radiology embolization are the primary rescue strategies.

Rebleeding

Upper GI bleed rebleeding occurs in 10–20% of patients despite initial endoscopic hemostasis. High-risk endoscopic stigmata that predict rebleeding: active arterial spurting, visible nonbleeding vessel, and adherent clot overlying an ulcer. These patients require 72-hour hospitalization after hemostasis. Nursing vigilance — monitoring for new hematemesis, rising heart rate, or falling hemoglobin — is the primary detection method for rebleeding.

Aspiration pneumonia

Patients with active hematemesis, altered mental status, or requiring procedural sedation are at high risk. Aspiration of blood or gastric contents causes chemical pneumonitis that can progress to aspiration pneumonia or acute respiratory distress syndrome (ARDS). Prevention: head of bed elevation ≥30 degrees, intubation before EGD when airway is compromised, and continuous monitoring of SpO2 and respiratory rate post-procedure.

Hepatic encephalopathy (variceal bleeding)

In cirrhotic patients, a large GI bleed provides a substantial protein load (blood is approximately 17–20% protein). The compromised cirrhotic liver cannot clear the resulting ammonia surge. Bacterial translocation during the bleed adds further inflammatory burden. The result is hepatic encephalopathy — confusion, asterixis (flapping tremor), and in severe cases, coma. Prevention: lactulose administration to reduce ammonia absorption, rifaximin in recurrent cases, antibiotic prophylaxis to reduce bacterial translocation. Monitor orientation, asterixis, and serum ammonia.

Hypovolemic acute kidney injury

Sustained hypoperfusion from hemorrhage triggers prerenal AKI through afferent arteriolar vasoconstriction and reduced glomerular filtration. Signs: rising creatinine, falling urine output, concentrated urine (high specific gravity, low sodium). Management: adequate volume resuscitation, avoidance of nephrotoxic agents (NSAIDs, IV contrast in volume-depleted patients), and serial creatinine monitoring. The BUN:Cr ratio elevation seen in upper GI bleed is distinct from the equal elevation seen in true AKI — BUN:Cr >20:1 with normal or near-normal creatinine is the upper GI bleed pattern.

Electrolyte disturbances from massive transfusion

Rapid transfusion of large volumes of banked blood introduces citrate (a preservative that chelates calcium), potassium (released from hemolyzed cells in stored blood), and causes hypothermia (from cold blood products). Monitor ionized calcium, potassium, and temperature during massive transfusion. Hypocalcemia from citrate toxicity manifests as perioral tingling, tetany, and cardiac dysrhythmias — replace calcium chloride or gluconate as needed.

NCLEX tips

First priority is circulation, not endoscopy. Establish two large-bore IVs and initiate fluid resuscitation before any diagnostic procedure. NCLEX always prioritizes ABCs and hemodynamic stabilization.
BUN:Cr ratio >20:1 = upper GI source. Digested blood protein is absorbed in the small bowel, raising BUN disproportionately to creatinine. A normal ratio does not rule out lower GI bleeding.
Melena = digested blood = upper GI (or proximal lower GI with slow transit). The black, tarry appearance results from bacterial oxidation of hemoglobin over 8+ hours of transit.
Hematochezia from an upper source = massive bleed. Blood moving so fast through the GI tract that it cannot be digested. This patient needs the most aggressive intervention on the unit.
Orthostatic hypotension is an early and important hemorrhage sign. A drop of ≥20 mmHg systolic on standing indicates ~15% blood volume loss and often appears before any drop in supine BP. Assess every GI bleed patient who can safely stand.
Octreotide is the first-line drug for variceal bleeding. It reduces portal pressure by inhibiting splanchnic vasodilator release. Beta-blockers (propranolol, nadolol) are for secondary prophylaxis after the acute episode — never for acute management.
Do not trust a normal H&H in acute hemorrhage. Hemodilution takes 24–72 hours to equilibrate. A patient who lost 1,500 mL of blood in the last hour may still have a hemoglobin of 14 g/dL. Assess hemodynamics and trend, not a single lab value.
Coffee-ground emesis = slow, partially digested bleeding. Gastric acid converts hemoglobin to hematin, producing the dark granular material. This indicates the bleed has been ongoing but is currently not brisk.
Know the anticoagulant reversal agents. Warfarin → PCC (four-factor prothrombin complex concentrate). Heparin → protamine sulfate. Dabigatran → idarucizumab. Rivaroxaban/apixaban → andexanet alfa. Questions about GI bleeding in anticoagulated patients will test whether you know these pairings.
Antibiotics in cirrhotic GI bleed are mandatory, not optional. Bacterial infection in cirrhosis is directly associated with higher rebleeding rates and mortality. Any cirrhotic patient with GI bleeding must receive IV antibiotic prophylaxis regardless of current signs of infection.

Peptic ulcer disease nursing reference — PUD pathophysiology, H. pylori eradication therapy, gastric vs duodenal comparison
Cirrhosis nursing reference — portal hypertension, Child-Pugh staging, variceal prophylaxis, hepatic encephalopathy
Nursing lab values cheat sheet — normal ranges and clinical significance for all labs in this article
Pancreatitis nursing reference — differential for abdominal pain and epigastric presentations
Diverticulitis nursing reference — diverticular disease and its relationship to lower GI bleed
Sepsis nursing reference — bacterial translocation sepsis in cirrhotic GI bleed
AKI nursing reference — hypovolemic AKI from hemorrhage, BUN:Cr monitoring