Glasgow Blatchford Score Calculator

Risk-stratify upper GI bleeding to determine need for intervention. Enter values for instant results with step-by-step formulas.

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Formula

GBS = Sum of component scores (BUN + Hemoglobin + SBP + Pulse + Melena + Syncope + Hepatic + Cardiac)

The Glasgow-Blatchford Score ranges from 0-23, calculated by summing points from blood urea nitrogen, hemoglobin (gender-specific), systolic blood pressure, pulse rate, and presence of melena, syncope, hepatic disease, or cardiac failure. A score of 0 identifies patients safe for outpatient management.

Worked Examples

Example 1: Low-Risk Patient Assessment

Problem: A 45-year-old male presents with hematemesis. BUN: 5.5 mmol/L, Hb: 14.2 g/dL, SBP: 125 mmHg, HR: 78, no melena, no syncope, no liver/cardiac disease.

Solution: BUN < 6.5 mmol/L: 0 points\nHb >= 13.0 g/dL (male): 0 points\nSBP >= 110 mmHg: 0 points\nHR < 100: 0 points\nNo melena: 0 points\nNo syncope: 0 points\nNo hepatic disease: 0 points\nNo cardiac failure: 0 points\nTotal GBS = 0

Result: GBS = 0 | Very Low Risk | Safe for outpatient management with follow-up endoscopy

Example 2: High-Risk Patient Assessment

Problem: A 68-year-old female with known cirrhosis presents with melena and syncope. BUN: 15 mmol/L, Hb: 8.5 g/dL, SBP: 88 mmHg, HR: 112.

Solution: BUN 10.0-24.9 mmol/L: 4 points\nHb < 10.0 g/dL (female): 6 points\nSBP < 90 mmHg: 3 points\nHR >= 100: 1 point\nMelena: 1 point\nSyncope: 2 points\nHepatic disease: 2 points\nNo cardiac failure: 0 points\nTotal GBS = 19

Result: GBS = 19 | Very High Risk | Emergent endoscopy, ICU admission, possible transfusion and surgical consult

Frequently Asked Questions

What is the Glasgow-Blatchford Score and when is it used?

The Glasgow-Blatchford Score (GBS) is a clinical risk stratification tool used to assess the severity of upper gastrointestinal (GI) bleeding and predict the need for medical intervention such as blood transfusion, endoscopic treatment, or surgery. It was developed in 2000 by Blatchford et al. at Glasgow Royal Infirmary using data from 1,748 consecutive upper GI bleed admissions. The score ranges from 0 to 23 and is calculated using laboratory values (blood urea nitrogen and hemoglobin), vital signs (systolic blood pressure and heart rate), and clinical findings (melena, syncope, hepatic disease, and cardiac failure). Its primary advantage over other scoring systems like the Rockall score is that it requires no endoscopy, making it ideal for rapid triage in the emergency department.

What does a Glasgow-Blatchford Score of 0 mean?

A GBS of 0 identifies patients at very low risk who may be safely managed as outpatients without requiring hospital admission or urgent endoscopy. Multiple validation studies have confirmed that patients scoring 0 have less than a 1% chance of needing any intervention (transfusion, endoscopic therapy, or surgery) and virtually zero mortality risk. The criteria for a score of 0 are: BUN less than 6.5 mmol/L, hemoglobin at least 13 g/dL for men or 12 g/dL for women, systolic blood pressure at least 110 mmHg, heart rate under 100, no melena, no syncope, no hepatic disease, and no cardiac failure. This low-risk identification is the most validated and clinically useful application of the GBS, as it safely reduces unnecessary hospital admissions by approximately 16-25% of upper GI bleed presentations.

How does the Glasgow-Blatchford Score compare to the Rockall Score?

The Glasgow-Blatchford Score and the Rockall Score are both used for upper GI bleeding but serve different purposes. The GBS is a pre-endoscopy score that predicts the need for clinical intervention (transfusion, endoscopy, or surgery) and is better at identifying low-risk patients suitable for outpatient management. The Rockall Score exists in two forms: a pre-endoscopy version and a complete version that incorporates endoscopic findings and diagnosis. The complete Rockall Score better predicts mortality rather than need for intervention. Head-to-head studies show the GBS has superior sensitivity (approaching 100%) for identifying patients needing intervention, while the Rockall Score has better specificity for mortality prediction. Most current guidelines recommend the GBS for initial emergency department triage decisions.

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