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Calculator: Blatchford score for gastrointestinal bleeding in adults (conventional and SI units)


Calculator: Blatchford score for gastrointestinal bleeding in adults (conventional and SI units)

 
Blood urea nitrogen

<18.2 mg/dL [<6.5 mmol/L] (0 points)

≥18.2 and <22.4 mg/dL [≥6.5 and <8 mmol/L] (2 points)

≥22.4 and <28 mg/dL [≥8 and <10 mmol/L] (3 points)

≥28 and <70 mg/dL [≥10 and <25 mmol/L] (4 points)

≥70 mg/dL [≥25 mmol/L] (6 points)
Hemoglobin

Male ≥13 g/dL [≥130 g/L] (0 points)

Male ≥12 and <13 g/dL [≥120 and <130 g/L] (1 point)

Male ≥10 and <12 g/dL [≥100 and <120 g/L] (3 points)

Female ≥12 g/dL [≥120 g/L] (0 points)

Female ≥10 and <12 g/dL [≥100 and <120 g/L] (1 point)

Male or female <10 g/dL [<100 g/L] (6 points)
Systolic blood pressure

≥110 mmHg (0 points)

100 to 109 mmHg (1 point)

90 to 99 mmHg (2 points)

<90 mmHg (3 points)
Other markers

Heart rate ≥100 per minute (1 point)

Melena at presentation (1 point)

Syncope at presentation (2 points)

Hepatic disease present (2 points)

Cardiac failure present (2 points)

 
Important: Inputs must be complete to perform calculation.

 
Total criteria point count:
 
Notes
  • A score of 0 is associated with a low risk of the need for endoscopic intervention.
  • Please refer to appropriate UpToDate topic reviews.

 
Only digits 0 to 9 and a single decimal point (".") are acceptable as numeric inputs. Attempted input of other characters into a numeric field may lead to an incorrect result.

Information on this page may not appear correctly if printed.

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