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CRUSADE Bleeding Score Calculator

Enter the patient's vitals and labs to compute the CRUSADE bleeding risk score.

How it is calculated

The score is a sum of points from eight factors: score = hematocrit + CrCl + heart rate + sex + CHF + vascular disease + diabetes + systolic BP. Hematocrit is in percent (below 31 scores 9, then 7, 3, 2 and 0 from 40 up). Creatinine clearance is in mL/min (15 or less scores 39 down to 0 above 120). Heart rate is in beats per minute (70 or less scores 0, above 120 scores 11). Systolic pressure is in mmHg (90 or less scores 10; 121 to 180 scores 1; above 200 scores 5). Female sex adds 8, signs of heart failure 7, prior vascular disease 6 and diabetes 6.

The total is shown out of 100 and grouped: 20 or less very low, 21 to 30 low, 31 to 40 moderate, 41 to 50 high, above 50 very high. Band edges are inclusive at the upper end. This is an educational calculation, not a clinical decision tool.

Worked example

A male patient has hematocrit 35%, creatinine clearance 70 mL/min, heart rate 85, systolic pressure 130 mmHg, no heart failure signs, prior vascular disease and diabetes. Points: hematocrit 35 gives 3, clearance 70 gives 17, heart rate 85 gives 3, systolic 130 gives 1, vascular disease adds 6, diabetes adds 6, sex adds 0, heart failure adds 0. The sum is 3 + 17 + 3 + 1 + 6 + 6 = 36 / 100, which the tool groups as Moderate.

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Common mistakes

  • Entering a serum creatinine value in the clearance field. The tool needs creatinine clearance in mL/min, so a number like 1.1 would be scored as a severely reduced clearance and add 39 points.
  • Using a hematocrit as a fraction (0.35) instead of a percentage (35). The low value would score the maximum 9 points for hematocrit.
  • Putting heart rate and blood pressure the wrong way round, or using diastolic pressure. The pressure field is the systolic (upper) value.
  • Leaving the yes/no selectors at their defaults. The heart failure, vascular disease and diabetes selectors each change the total by 6 to 7 points, so check each one.
  • Reading the score as a percentage chance of bleeding. It is a points total out of 100 with a risk band, not a probability.

Sources

About this calculator

The CRUSADE bleeding score (from the CRUSADE registry — Can Rapid risk stratification of Unstable angina patients Suppress ADverse outcomes with Early implementation of the ACC/AHA guidelines) predicts the risk of major bleeding during hospitalization for patients with acute coronary syndromes such as NSTEMI. It's built from eight weighted inputs: baseline hematocrit, calculated creatinine clearance, heart rate, sex, signs of congestive heart failure, prior vascular disease, diabetes, and systolic blood pressure.

Each factor contributes points to a total score that maps to a bleeding-risk category from very low to very high. Cardiologists and interventional teams use it alongside ischemic-risk scores to balance how aggressively to anticoagulate an ACS patient — since the drugs that reduce clot risk also raise bleeding risk. This tool is for clinical reference only and is not medical advice.

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Comments (1)

  • Editorial team

    This score was published for patients with non-ST-elevation acute coronary syndromes, so it is not a general bleeding tool for everyone. The creatinine clearance box expects the figure from the record, as the tool does not calculate it from age and weight. It is an educational calculation only, and treatment decisions belong with the care team. Which of the eight inputs is hardest to find in your records?

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