Emergency Medicine · Orthopedics

Ottawa Ankle Rules calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Pain in the malleolar zoneBone tenderness at posterior edge/tip of lateral malleolusBone tenderness at posterior edge/tip of medial malleolusPain in the midfoot zoneBone tenderness at base of fifth metatarsalBone tenderness over navicularUnable to bear weight for 4 steps both immediately and in evaluation

Result

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Formula inputs

Pain in the malleolar zone
Bone tenderness at posterior edge/tip of lateral malleolus
Bone tenderness at posterior edge/tip of medial malleolus
Pain in the midfoot zone
Bone tenderness at base of fifth metatarsal
Bone tenderness over navicular
Unable to bear weight for 4 steps both immediately and in evaluation

Primary source

Stiell IG et al. Decision rules for radiography in acute ankle injuries: refinement and validation. JAMA (1993)

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