Clinical use
Use this calculator for ankle/foot x-ray decision rule in theemergency medicine workflow. It is decision support and should be interpreted with the patient context, local protocols, and clinician judgment.
Calculate Ottawa Ankle
Interpretation
Any positive criterion: X-ray indicated. Sensitivity >98% for fractures. Valid for ages 2-55. Not validated if intoxicated, multiple injuries, or unable to cooperate.
Required inputs
- Malleolar Tenderness
- Navicular Tenderness
- Base 5 Th Metatarsal Tenderness
- Inability To Bear Weight
Evidence and limitations
This page cites 1 published reference. Confirm units and inclusion criteria before applying the output; calculators do not replace assessment, escalation, or local policy.
References
- Stiell IG et al. JAMA 1993;269:1127-1132
Frequently asked questions
What is the Ottawa Ankle Rule?
Ottawa Ankle Rule is a clinical calculator used for Ankle/foot X-ray decision rule.
How do I interpret the Ottawa Ankle Rule?
Any positive criterion: X-ray indicated. Sensitivity >98% for fractures. Valid for ages 2-55. Not validated if intoxicated, multiple injuries, or unable to cooperate.
What inputs are required for the Ottawa Ankle Rule?
Required inputs include Malleolar Tenderness, Navicular Tenderness, Base 5 Th Metatarsal Tenderness, Inability To Bear Weight.
What is the evidence behind the Ottawa Ankle Rule?
The Ottawa Ankle Rule page cites Stiell IG et al. JAMA 1993;269:1127-1132.
Next steps
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