The Glasgow-Blatchford Bleeding Score (GBS)
The Glasgow-Blatchford Score (GBS) is a validated clinical prediction rule used to evaluate patients presenting with acute upper gastrointestinal bleeding (UGIB). Unlike other scores (such as the Rockall score), the GBS is calculated prior to endoscopy using strictly clinical history, vital signs, and initial laboratory values.
It is primarily used to identify "low-risk" patients who can safely undergo outpatient management, thereby avoiding unnecessary hospital admissions.
Glasgow-Blatchford Scoring Criteria
The total score is the sum of the points allocated across four distinct clinical categories. A score of 0 indicates the lowest risk.
1. Blood Urea Nitrogen (BUN) Level
BUN greater than or equal to 18.2 mg/dL to less than 22.4 mg/dL (greater than or equal to 6.5 to less than 8.0 mmol/L) (+2 points)
BUN greater than or equal to 22.4 mg/dL to less than 28.0 mg/dL (greater than or equal to 8.0 to less than 10.0 mmol/L) (+3 points)
BUN greater than or equal to 28.0 mg/dL to less than 70.0 mg/dL (greater than or equal to 10.0 to less than 25.0 mmol/L) (+4 points)
BUN greater than or equal to 70.0 mg/dL (greater than or equal to 25.0 mmol/L) (+6 points)
2. Hemoglobin Level
For Men:
Hemoglobin greater than or equal to 12.0 g/dL to less than 13.0 g/dL (+1 point)
Hemoglobin greater than or equal to 10.0 g/dL to less than 12.0 g/dL (+3 points)
Hemoglobin less than 10.0 g/dL (+6 points)
For Women:
Hemoglobin greater than or equal to 10.0 g/dL to less than 12.0 g/dL (+1 point)
Hemoglobin less than 10.0 g/dL (+6 points)
3. Vital Signs
Systolic Blood Pressure 100 to 109 mmHg (+1 point)
Systolic Blood Pressure 90 to 99 mmHg (+2 points)
Systolic Blood Pressure less than 90 mmHg (+3 points)
Heart Rate greater than or equal to 100 beats per minute (+1 point)
4. Clinical Markers and Comorbidities
Presentation with Syncope (fainting) (+2 points)
Presentation with Melena (black, tarry stools) (+1 point)
History of Hepatic Disease / Liver Failure (+2 points)
History of Cardiac Failure (+2 points)
Clinical Interpretation and Management Strategy
Score of 0 to 1 (Low Risk): The risk of requiring an intervention (blood transfusion, endoscopic therapy, or surgery) or facing mortality is extremely low. These patients are ideal candidates for safe discharge from the emergency department with outpatient gastroenterology follow-up.
Score of 2 or more (Higher Risk): Requires formal hospital admission. These patients are at an increased risk for requiring active clinical interventions, urgent upper GI endoscopy, or blood product resuscitation.
Glasgow-Blatchford Score References
Blatchford, O., Murray, W. R., & Blatchford, M. (2000). A risk score to predict need for treatment for upper-gastrointestinal haemorrhage. The Lancet, 356(9238), 1318-1321.
Stanley, A. J., Ashley, L., Dalton, H. R., et al. (2009). Outpatient management of patients with low-risk upper-gastrointestinal haemorrhage: multicentre validation and economic evaluation of the Glasgow-Blatchford score. The Lancet, 373(9657), 42-47.
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