🧠 RACE Scale (LVO Stroke Screen)
UseWhen to use: EMS/ED suspected acute ischemic stroke routing.
Strata≥5 higher LVO probability cue; <5 still needs full stroke pathway.
LimitsWhen not to use: to exclude posterior circulation LVO. · Pitfall: skipping NIHSS/imaging after negative screen. · Follow local destination protocols.
SourcePérez de la Ossa et al. RACE scale
This-shift next steps
After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.
Paste the link in Slack, Teams, X, or LinkedIn — the preview image comes from this page’s Open Graph card.
Methodology · worked example, guidelines & full notes
0–9.
When to use
When to use: EMS/ED suspected acute ischemic stroke routing.
How it works
Face 0–2 + arm 0–2 + leg 0–2 + gaze 0–1 + aphasia/agnosia 0–2.
Key points
- 0–9.
- ≥5 LVO cue.
- Next: NIHSS / CTA.
References
- Pérez de la Ossa et al. RACE scale
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.
| Facial palsy | Mild (1) |
|---|---|
| Arm motor impairment | Able to lift, cannot hold (1) |
| Leg motor impairment | Able to lift, cannot hold (1) |
| Head / gaze deviation | Absent (0) |
| Aphasia (right hemiparesis) OR agnosia (left hemiparesis) | Mild / partial (1) |
→RACE4/9
- Cue：<5 — lower LVO screen positivity; still follow stroke pathway
| Facial palsy | Absent (0) |
|---|---|
| Arm motor impairment | Normal / mild drift (0) |
| Leg motor impairment | Normal / mild drift (0) |
| Head / gaze deviation | Absent (0) |
| Aphasia (right hemiparesis) OR agnosia (left hemiparesis) | Neither (0) |
→RACE0/9
- Cue：<5 — lower LVO screen positivity; still follow stroke pathway
Verification & sources · governance
FAQ
Frequently asked questions
- Does RACE Scale (LVO Stroke Screen) upload patient data? Where is it calculated?
- Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
- How is RACE Scale (LVO Stroke Screen) calculated in practice? Can you show a worked example?
- Inputs: Facial palsy Mild (1), Arm motor impairment Able to lift, cannot hold (1), Leg motor impairment Able to lift, cannot hold (1), Head / gaze deviation Absent (0), Aphasia (right hemiparesis) OR agnosia (left hemiparesis) Mild / partial (1) → Result: RACE 4 /9（Cue: <5 — lower LVO screen positivity; still follow stroke pathway） Inputs: Facial palsy Absent (0), Arm motor impairment Normal / mild drift (0), Leg motor impairment Normal / mild drift (0), Head / gaze deviation Absent (0), Aphasia (right hemiparesis) OR agnosia (left hemiparesis) Neither (0) → Result: RACE 0 /9（Cue: <5 — lower LVO screen positivity; still follow stroke pathway）