ORBIT
Alternative bleeding risk score for AF — may outperform HAS-BLED.
What it is for
Bleeding risk in AF (alternative to HAS-BLED).
Use the working calculator
The working ORBIT calculator is on our calculators page. It is free and needs no account. Enter the values and it shows the result with the reading that goes with it.
The calculators are free. The trial opens the protocols and pathways they link to.What you enter
The calculator asks for 5 items.
- Hb < 130 (M) / < 120 (F) OR Hct < 40%/36% (2 points)
- Age > 74 (1 point)
- Bleeding history (any prior major bleed) (2 points)
- eGFR < 60 (1 point)
- Concomitant antiplatelet treatment (1 point)
How the result is read
The result is shown as ORBIT score, out of a maximum of 7.
The calculator reads each total as follows. Where a single answer changes the reading (for example sex, age or one extreme value), the working calculator says so.
| Total | Band | What the calculator says |
|---|---|---|
| 0 to 2 | Low risk | Major bleed ~ 2.4%/yr. |
| 3 | Medium risk | Major bleed ~ 4.7%/yr — modify factors. |
| 4 to 7 | High risk | Major bleed ~ 8.1%/yr — review need + modify. |
Sources
These are the sources the calculator cites. Check the current version before relying on a threshold.
Related
For qualified clinicians. A score supports a clinical decision and does not make it: check the inputs, read the cited source, and use the tools in your clinical system for patient care where one is provided.