Glasgow-Blatchford Score (Upper GI Bleed) — free guideline decision tool
Risk-stratify upper GI bleeding with the Glasgow-Blatchford Score (GBS).
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
Runs in your browser
No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Blood urea | 6 mmol/L |
|---|---|
| Haemoglobin | 13 g/dL |
| Sex | Male |
| Systolic BP | 120 mmHg |
| Pulse ≥ 100 | No |
| Melena | No |
| Syncope | No |
| Hepatic disease | No |
| Cardiac failure | No |
→GBS0
- Interpretation：Score 0 — very low risk; outpatient management may be considered.
| Blood urea | 6 mmol/L |
|---|---|
| Haemoglobin | 13 g/dL |
| Sex | Female |
| Systolic BP | 120 mmHg |
| Pulse ≥ 100 | Yes (+1) |
| Melena | Yes (+1) |
| Syncope | Yes (+2) |
| Hepatic disease | Yes (+2) |
| Cardiac failure | Yes (+2) |
→GBS8
- Interpretation：Score ≥ 1 — higher risk; admission and endoscopic assessment.
Common questions
What is Glasgow-Blatchford Score (Upper GI Bleed)?
Risk-stratify upper GI bleeding with the Glasgow-Blatchford Score (GBS).
How is Glasgow-Blatchford Score (Upper GI Bleed) calculated? What is the core formula?
Points from blood urea, haemoglobin (sex-specific), systolic BP, pulse ≥ 100, melena, syncope, hepatic disease and cardiac failure. Score 0 = very low risk.
When is Glasgow-Blatchford Score (Upper GI Bleed) used?
Identify low-risk patients suitable for outpatient management before endoscopy.
What are the key clinical points for Glasgow-Blatchford Score (Upper GI Bleed)?
Uses only pre-endoscopy clinical and laboratory data. GBS 0 (some use ≤ 1) may allow outpatient management. Predicts need for transfusion, endoscopic therapy or surgery.
What are the limits and cautions when using Glasgow-Blatchford Score (Upper GI Bleed)?
For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
How is Glasgow-Blatchford Score (Upper GI Bleed) calculated in practice? Can you show a worked example?
Inputs: Blood urea 6 mmol/L, Haemoglobin 13 g/dL, Sex Male, Systolic BP 120 mmHg, Pulse ≥ 100 No, Melena No, Syncope No, Hepatic disease No… → Result: GBS 0（Interpretation: Score 0 — very low risk; outpatient management may be considered.） Inputs: Blood urea 6 mmol/L, Haemoglobin 13 g/dL, Sex Female, Systolic BP 120 mmHg, Pulse ≥ 100 Yes (+1), Melena Yes (+1), Syncope Yes (+2), Hepatic disease Yes (+2)… → Result: GBS 8（Interpretation: Score ≥ 1 — higher risk; admission and endoscopic assessment.）
Run Glasgow-Blatchford Score (Upper GI Bleed) now
Risk-stratify upper GI bleeding with the Glasgow-Blatchford Score (GBS).
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.
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