GASTROINTESTINAL BLEEDING

✓ Medically ReviewedDISEASEID: MDBT0104🚨 TRIAGE: EMERGENCYICD-10: K92.2

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Definition

CLINICAL DEFINITION

Gastrointestinal bleeding is blood loss from oesophagus (food pipe) to anus (bowel outlet). Upper bleeding starts above ligament of Treitz (upper gut anchor). It often causes haematemesis (vomiting blood) or melena (black tarry stools). Lower bleeding starts below that anchor. It often causes haematochezia (bright red rectal blood). Severe loss causes shock (poor organ flow) with fast pulse and low pressure.

IN PLAIN ENGLISH

Bleeding starts inside the food tube or bowels. Upper bleeds cause vomit with blood. They cause black tar-like stools. Lower bleeds cause red blood from the back passage. Heavy loss is unsafe and needs fast care.

COMMON MISCONCEPTION / WHAT IT DOES NOT MEAN

Gastrointestinal bleeding is not haemoptysis (coughing blood) from lungs and airways. It is not epistaxis (nosebleed) with swallowed blood alone. It is not haematuria (blood in urine) from kidneys or bladder. It is not vaginal bleeding from uterus or vagina. Confirm source with history plus rectal exam (back passage check) and endoscopy (camera look).

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Word Breakdown

gastrointestinal-

=stomach and intestines (food tube and bowels)

bleed-

=blood loss from vessels

-ing

=active or ongoing process

Literal Meaning: ongoing blood loss from stomach-gut tract

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Abbreviations

UGIB=Upper gastrointestinal bleeding - loss above ligament of Treitz (upper gut anchor)

LGIB=Lower gastrointestinal bleeding - loss below ligament of Treitz (lower gut anchor)

GIB=Gastrointestinal bleeding - any blood loss from gut tract

GBS=Glasgow-Blatchford score - risk tool for upper bleed care need

NSAID=Non-steroidal anti-inflammatory drug - pain drug injuring gut lining

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Synonyms & Variants

GI bleeding›Gastrointestinal haemorrhage›GI haemorrhage›Digestive tract bleeding›

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Category-Specific Context

Gastrointestinal bleeding is a Disease because it is a pathological process (harmful body process) with causes and course. It is not a Symptom (felt complaint) such as melena alone. It spans variceal (swollen vein) and non-variceal (ulcer and mucosal) pathways. Care targets source control and shock prevention rather than symptom cover alone. It sits under gut emergencies with shock as its urgent face.

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Clinical Context & Usage

CLINICAL SETTINGS

Emergency DepartmentAcute Medical UnitGastroenterology Clinic and Endoscopy SuiteIntensive Care UnitPrimary Care for follow-up

USAGE & DOCUMENTATION NOTES

Use gastrointestinal bleeding for proven or strongly suspected gut blood loss, not red stool alone. Record haematemesis (vomiting blood), melena (black tarry stools) and haematochezia (red rectal blood). Document NSAIDs (pain drugs), anticoagulants (clot thinners), antiplatelets (clot-cell blockers), liver disease and prior ulcer. Do not label haemoptysis (coughed blood) or piles spotting alone without gut source workup.

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Primary Causes & Pathophysiology

PATHOPHYSIOLOGY

Mucosal breach (lining break) exposes vessels to acid and shear so clots fail. Ulcers and erosions (shallow lining sores) erode into submucosal arteries (deeper wall vessels). Portal hypertension (high liver-vein pressure) dilates varices (swollen veins) that rupture under strain. Diverticula (wall pouches) and angiodysplasia (fragile surface vessels) bleed from thin walls. Tumours and inflammation (immune gut injury) create friable (easily torn) tissue. Volume loss then cuts perfusion (organ blood flow) and drives shock.

PRIMARY CAUSES

Peptic ulcer disease of stomach and duodenum

Acid and Helicobacter pylori (stomach germ) erode mucosa (lining) into arteries causing brisk upper loss

Oesophageal and gastric varices from portal hypertension

High liver-vein pressure dilates collateral veins (bypass vessels) that rupture with massive vomiting of blood

Erosive gastritis and oesophagitis

NSAIDs, alcohol and reflux injure surface lining so diffuse oozing and melena (black stools) occur

Mallory-Weiss tear at gastro-oesophageal junction

Forceful vomiting shears mucosa (lining tear) causing arterial ooze after retching

Colonic diverticular bleeding

Vasa recta (pouch wall vessels) stretch over domes and rupture into lumen (bowel channel) causing painless red loss

Angiodysplasia of stomach, small bowel and colon

Degenerative dilated capillaries (tiny fragile vessels) leak or burst, often in older adults

Gastrointestinal malignancy including gastric, oesophageal and colorectal cancer

Tumour neovessels (new fragile vessels) and ulcerated mass bleed chronically or acutely

Inflammatory bowel disease including ulcerative colitis and Crohn disease

Immune ulcers and friable mucosa (easily torn lining) ooze blood with diarrhoea and urgency

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Drug-Induced Causes

💊 NSAIDs such as ibuprofen, naproxen and diclofenac ↗

Mechanism: Block protective prostaglandins (lining signals) so ulcers and erosions form and bleed

→ Stop or switch agent, start proton pump inhibitor (acid blocker), test for Helicobacter pylori (stomach germ) and arrange endoscopy (camera look) if bleeding

💊 Anticoagulants such as warfarin, apixaban, rivaroxaban and heparin ↗

Mechanism: Impair clot formation so small mucosal breaks become prolonged gut loss

→ Assess clot versus bleed risk, hold or reverse per protocol, correct coagulopathy (clotting failure) and seek urgent specialist and endoscopy input

💊 Antiplatelets such as aspirin, clopidogrel and ticagrelor ↗

Mechanism: Block platelet plugs (clot-cell seals) so ulcers and varices bleed longer

→ Do not stop dual therapy alone after stents (artery tubes), give proton pump inhibitor cover and get cardiology plus gastroenterology review fast

💊 Selective serotonin reuptake inhibitors such as fluoxetine and sertraline ↗

Mechanism: Deplete platelet serotonin (clot signal) and raise bleed risk, mainly with NSAIDs or antiplatelets

→ Review need, avoid NSAID pairing where possible, add stomach protection and monitor haemoglobin (blood pigment) and stools

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Epidemiology

Prevalence:Gastrointestinal bleeding is a common emergency worldwide. Upper bleeding is more often seen than lower bleeding. Risk rises with age, NSAID (pain drug) use and anticoagulant (thinner) use. Variceal bleeding clusters with cirrhosis (liver scarring) and alcohol use. True rates vary by testing and endoscopy (camera) access.

Age Group:All ages can bleed when cause is present. Peptic ulcer and diverticular (pouch) bleeding rise in middle and older age. Variceal bleeding peaks with established liver disease in adults. Tumour bleeding rises with age and screening gaps. Paediatric cases more often link to inflammation or Meckel pouch (birth remnant).

Geographic Distribution:Gastrointestinal bleeding occurs worldwide without single clustering. Variceal patterns follow cirrhosis (liver scarring) from alcohol and viral hepatitis (liver germs). NSAID and aspirin patterns follow pain and heart care. Detection tracks emergency and endoscopy (camera) access. Tumour patterns reflect screening uptake.

Red Flags & Triage ★

TRIAGE LEVEL

🚨 EMERGENCY

DO NOT MISS — LIFE-THREATENING PRESENTATIONS

Variceal rupture with massive haematemesis in liver disease
Haemorrhagic shock with tachycardia and hypotension
Rebleeding after ulcers with high-risk stigmata
Gastrointestinal malignancy as first bleed cause
Aortoenteric fistula with herald bleed then exsanguination

URGENT EVALUATION TRIGGERS

Haematemesis or melena with dizziness or syncope
Haematochezia with pallor, fast pulse or low pressure
Vomiting blood in known liver disease
Black stools on NSAIDs, aspirin or anticoagulants
Haemoglobin drop with chest pain or breathlessness

Contraindications & Precautions

CONTRAINDICATIONS

Do not perform elective endoscopy without resuscitation and airway review in massive haematemesis
Do not give NSAIDs or alcohol during acute ulcer bleeding
Do not correct clotting alone without source control plan
Do not discharge ongoing melena or shock for outpatient review

SPECIAL PRECAUTIONS

Resuscitate first with large-bore access and blood grouping
Monitor pulse, pressure, breathing, urine and mentation often
Use restrictive transfusion thresholds per protocol in most stable cases
Start high-dose acid blockade for suspected upper source
Arrange urgent liver and clotting review when varices likely

Complications

DOWNSTREAM CLINICAL COMPLICATIONS

Haemorrhagic shock with hypotension (low pressure)
Acute anaemia with fatigue and dyspnoea (breathlessness)
Rebleeding after initial control
Aspiration pneumonia from vomited blood
Acute kidney injury from poor perfusion (organ flow)
Myocardial ischaemia from oxygen-supply mismatch
Coagulopathy with prolonged bleeding
Death in massive or variceal bleeding

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Reference Ranges

CRITICAL (PANIC) VALUEHypotension with systolic below 90, pulse above 120, syncope (faint) or ongoing haematemesis with melena needs emergency care. Haemoglobin fall with shock signs needs transfusion review.

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Confused With (LASA & DDx) ★

LEXICAL (LASA) — SIMILAR NAMES

Haemoptysis

Shares bloody output and hemo prefix but is coughed lung blood with froth, not vomited gut blood with coffee-ground or tarry stools

Haematuria

Similar bleeding wording but is urine blood from urinary tract with dysuria (pain passing urine), not rectal blood or melena

Epistaxis with swallowed blood

Nosebleed blood can be vomited or passed as melena and mimics upper bleed, but source is nasal not gut

CLINICAL DIFFERENTIAL DIAGNOSES (DDx)

Haemoptysis from respiratory tract

Key Distinguishing Feature: Coughed bright blood with breathlessness and froth rather than vomiting with melena

Epistaxis with swallowed blood

Key Distinguishing Feature: Active nosebleed with blood in nose and throat rather than primary gut lesion on endoscopy

Haematuria

Key Distinguishing Feature: Red urine with urinary symptoms and dipstick blood rather than rectal blood or black stools

Vaginal bleeding

Key Distinguishing Feature: Per-vaginal loss tied to cycle or pregnancy rather than gut source on rectal and scope exam

Bleeding haemorrhoids with outlet spotting

Key Distinguishing Feature: Small bright streaks on paper with itch or lump and normal upper scope rather than melena or shock

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Clinical Pearls

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Resuscitate before scoping in shock with two large cannulas and blood grouping. Airway cover matters in massive haematemesis (vomiting blood).

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Use Glasgow-Blatchford score at triage for upper bleeds. Zero with normal vitals marks low risk while higher scores need urgent scope.

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Start high-dose proton pump inhibitor (acid blocker) for suspected upper ulcer bleed. Arrange endoscopy (camera look) within 24 hours.

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Treat likely variceal bleed with vasoactive drug plus antibiotics in cirrhosis (liver scarring). Arrange band ligation (vein banding) urgently.

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Use restrictive transfusion in most stable cases per protocol, often near 70 g per L. Give more freely with heart disease or ongoing shock per team.

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Example Usage & SOAP

CLINICAL SENTENCE

""68-year-old man on aspirin with melena has upper gastrointestinal bleeding from ulcer.""

IN A SOAP NOTE

S: 68-year-old man with black tarry stools and one vomit of blood, dizzy on standing, on aspirin. O: Temp 36.7C, BP 96/60, HR 118, RR 22, SpO2 97 percent on air, pale with melena on rectal exam. Labs show low haemoglobin with raised urea. A: Upper gastrointestinal bleeding with shock, likely ulcer. P: Resuscitate with fluids and crossmatch, high-dose proton pump inhibitor, nil by mouth, urgent gastroenterology with endoscopy within 24 hours, Blatchford and Rockall scored, aspirin review.

DIFFERENTIAL DIAGNOSIS CONTEXT

Vomiting blood with melena favours upper gastrointestinal bleeding from ulcer or varices. Bright red rectal loss with stable vitals favours lower source such as diverticula (pouches). Coughed frothy blood favours lungs not gut. Red urine favours urinary source. Scope plus rectal exam and urea rise separate upper from lower.

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Classifications & Scoring

GRADING SYSTEM

Forrest Classification for ulcer bleeding

Grades ulcer stigmata (scope risk marks) from active spurting and oozing to visible vessel, clot and clean base to guide endoscopic therapy

SCORING TOOL

Glasgow-Blatchford Score

Pre-endoscopy risk tool using vitals, haemoglobin, urea and history to flag need for admission and urgent scope

SCORING TOOL

Rockall Score

Post-endoscopy risk tool using age, shock, comorbidity and lesion marks to predict rebleed and death

SCORING TOOL

AIMS65 Score

Bedside score using albumin, INR (clot measure), mentation, pressure and age to predict death in upper bleeding

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Prognosis

SHORT-TERM OUTCOME

Short term course depends on rate, source and frailty (low reserve). Brisk upper or variceal loss can cause shock within hours. Early resuscitation (fluid and blood support) plus endoscopy (camera look) lowers rebleed. Delay with missed shock signs raises organ harm. Risk scores guide admission and urgency.

LONG-TERM PROGNOSIS

Long term outlook depends on cause and liver health. Ulcer cure with Helicobacter pylori (stomach germ) care lowers return. Varices need pressure lowering and surveillance (repeat checks). Tumours need stage-based cancer care. Ongoing NSAID or thinner use without protection raises repeat bleeds.

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References & Coding

ICD-10 DIAGNOSTIC CODE

K92.2

LITERATURE CITATIONS & GUIDELINES

[1]WHO ICD-10 K92 Gastrointestinal haemorrhage

[2]NICE acute upper gastrointestinal bleeding guidance

[3]American College of Gastroenterology upper and lower bleeding guidance

[4]EASL decompensated cirrhosis and variceal bleeding guidance

[5]Harrison's Principles of Internal Medicine gastrointestinal bleeding

MEDICAL DISCLAIMER — This content is intended for educational purposes and qualified healthcare professionals only. Always refer to current clinical diagnostic criteria, institutional protocols, and official guidelines. Medobo is not responsible for clinical decisions made based on this content.

GASTROINTESTINAL BLEEDING

Definition

Word Breakdown

Abbreviations

Synonyms & Variants

Category-Specific Context

Clinical Context & Usage

Primary Causes & Pathophysiology

Drug-Induced Causes

Epidemiology

Red Flags & Triage ★

DO NOT MISS — LIFE-THREATENING PRESENTATIONS

URGENT EVALUATION TRIGGERS

Contraindications & Precautions

CONTRAINDICATIONS

SPECIAL PRECAUTIONS

Complications

DOWNSTREAM CLINICAL COMPLICATIONS

Reference Ranges

Confused With (LASA & DDx) ★

Clinical Pearls

Example Usage & SOAP

Classifications & Scoring

Forrest Classification for ulcer bleeding

Glasgow-Blatchford Score

Rockall Score

AIMS65 Score

Prognosis

SHORT-TERM OUTCOME

LONG-TERM PROGNOSIS

Related Terms

References & Coding