🩸 ORBIT Bleeding Score (AF)
Estimate anticoagulation bleeding risk in atrial fibrillation with ORBIT.
Clinical takeaway
Identifies modifiable contributors to bleeding.
Loading calculator…
Paste the link in Slack, Teams, X, or LinkedIn — the preview image comes from this page’s Open Graph card.
When to use
Assess major bleeding risk and target modifiable factors.
How it works
Anaemia (2), age > 74 (1), bleeding history (2), eGFR < 60 (1), antiplatelet use (1). 0–2 low, 3 medium, 4–7 high.
Key points
- Identifies modifiable contributors to bleeding.
- Should not by itself withhold indicated anticoagulation.
- Compares favourably with HAS-BLED in some cohorts.
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.
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.
| Anaemia (Hb low / Hct < 36% F, < 40% M) | No |
|---|---|
| Age > 74 years | No |
| Bleeding history | No |
| eGFR < 60 mL/min/1.73m² | No |
| Treatment with antiplatelet | No |
→ORBIT0/7
- Bleeding risk：Low (~2.4 per 100 pt-yr)
| Anaemia (Hb low / Hct < 36% F, < 40% M) | Yes (+2) |
|---|---|
| Age > 74 years | Yes (+1) |
| Bleeding history | Yes (+2) |
| eGFR < 60 mL/min/1.73m² | Yes (+1) |
| Treatment with antiplatelet | Yes (+1) |
→ORBIT7/7
- Bleeding risk：High (~8.1 per 100 pt-yr)
Frequently asked questions
- What is ORBIT Bleeding Score (AF)?
- Estimate anticoagulation bleeding risk in atrial fibrillation with ORBIT.
- How is ORBIT Bleeding Score (AF) calculated? What is the core formula?
- Anaemia (2), age > 74 (1), bleeding history (2), eGFR < 60 (1), antiplatelet use (1). 0–2 low, 3 medium, 4–7 high.
- When is ORBIT Bleeding Score (AF) used?
- Assess major bleeding risk and target modifiable factors.
- What are the key clinical points for ORBIT Bleeding Score (AF)?
- Identifies modifiable contributors to bleeding. Should not by itself withhold indicated anticoagulation. Compares favourably with HAS-BLED in some cohorts.
- What are the limits and cautions when using ORBIT Bleeding Score (AF)?
- 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 ORBIT Bleeding Score (AF) calculated in practice? Can you show a worked example?
- Inputs: Anaemia (Hb low / Hct < 36% F, < 40% M) No, Age > 74 years No, Bleeding history No, eGFR < 60 mL/min/1.73m² No, Treatment with antiplatelet No → Result: ORBIT 0 /7（Bleeding risk: Low (~2.4 per 100 pt-yr)） Inputs: Anaemia (Hb low / Hct < 36% F, < 40% M) Yes (+2), Age > 74 years Yes (+1), Bleeding history Yes (+2), eGFR < 60 mL/min/1.73m² Yes (+1), Treatment with antiplatelet Yes (+1) → Result: ORBIT 7 /7（Bleeding risk: High (~8.1 per 100 pt-yr)）