RACE (Rapid Arterial oCclusion Evaluation)
Rapid Arterial oCclusion Evaluation scale (Pérez de la Ossa 2014): facial palsy (0-2), arm motor (0-2), leg motor (0-2), head/gaze deviation (0-1), aphasia or agnosia (0-2).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Facial palsy
- 2
- Arm motor function
- 2
- Leg motor function
- 1
- Head / gaze deviation
- 1
- Aphasia or agnosia
- 2
Result: RACE 8 of 9: LVO is likely (>=5 per Pérez de la Ossa 2014, sensitivity 85% / specificity 68%). Consider transport to a comprehensive / thrombectomy-capable stroke center per local protocol.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- 0-4
- LVO less likely on the RACE threshold; continue stroke workup per local protocol.
- 5-9
- LVO likely (Pérez de la Ossa 2014 sensitivity 85% / specificity 68%). Consider transport to a comprehensive / thrombectomy-capable stroke center per local protocol.
What you enter
- Facial palsy (0-2)
- Arm motor function (0-2)
- Leg motor function (0-2)
- Head / gaze deviation (0-1)
- Aphasia or agnosia (0-2)
How this is calculated
Pérez de la Ossa N, Carrera D, Gorchs M, et al. Design and validation of a prehospital stroke scale to predict large arterial occlusion: the rapid arterial occlusion evaluation scale. Stroke. 2014;45(1):87-91. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.