Local calculation history
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How to use this calculator
- Select the model matching the patient’s actual clinical setting.
- Enter all required values using the displayed units.
- Choose “Unknown” when information is unavailable. Never assume “No.”
- Review the point breakdown, warnings, population, and prediction period.
- Address modifiable factors and interpret the score alongside thrombotic or ischemic risk.
- Verify treatment decisions with current guidance and qualified clinical judgment.
Example model selection table
| Clinical scenario | Suggested model | Main output |
|---|---|---|
| Atrial fibrillation anticoagulation review | HAS-BLED | 0–9 additive score and modifiable factors |
| Atrial fibrillation with current laboratory values | ORBIT | Low, medium, or high category |
| Warfarin-associated hemorrhage context in AF | ATRIA | Low, intermediate, or high category |
| Stable anticoagulation after VTE | VTE-BLEED | Low or high category |
| Hospitalized medical patient | IMPROVE | Below 7 or at least 7 |
| PCI with DAPT duration review | PRECISE-DAPT | Estimated score; verify reference implementation |
| PCI high-bleeding-risk classification | ARC-HBR | Major/minor criteria classification |
Clinical limitations
Bleeding scores have limited discrimination and should support, not replace, individualized review. A high score generally identifies opportunities for closer follow-up and correction of modifiable risk factors. It does not automatically mean that anticoagulation or antiplatelet therapy should be withheld.
Definitions, laboratory methods, and treatment standards may vary. Confirm that each model fits the patient population, timing, and medication setting. Recalculate when clinical status, medicines, kidney function, liver function, blood pressure, or blood counts change.
Frequently asked questions
Can I compare scores from different models?
No. Each model was developed for a specific population and outcome. Their point totals are not interchangeable.
Does a high score mean anticoagulation must stop?
No. A high bleeding score should prompt careful review, risk-factor modification, follow-up, and shared clinical decision-making.
What happens when a value is unknown?
The calculator lists it as missing and marks the result incomplete. It does not silently assign zero points.
Why is PRECISE-DAPT labeled an estimate?
The original score uses a bedside nomogram/reference implementation. This file transparently applies linear interpolation between published endpoint values and requires external verification.
Is ARC-HBR a numerical score?
No. It is a criteria-based consensus definition. One major criterion or two minor criteria classify high bleeding risk.
Methodology references
- Pisters R, et al. Original HAS-BLED derivation for atrial fibrillation.
- O’Brien EC, et al. Original ORBIT bleeding score.
- Fang MC, et al. ATRIA hemorrhage risk scheme.
- Klok FA, et al. VTE-BLEED score development.
- IMPROVE investigators. Bleeding-risk assessment in hospitalized medical patients.
- Costa F, et al. PRECISE-DAPT development and validation.
- Urban P, et al. ARC-HBR consensus definition.