Emergency Medicine · Orthopaedics
Ottawa Knee Rule calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Result
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0
Ottawa Knee Rule negative
Band: Ottawa Knee Rule negative
Interpretation. Ottawa Knee Rule negative
Suggested management. No knee radiograph is indicated by the rule.
Ottawa Knee Rule: 0 — Ottawa Knee Rule negative. Interpretation: Ottawa Knee Rule negative What to do: No knee radiograph is indicated by the rule. Inputs: Age ≥55 years: false; Isolated patellar tenderness: false; Fibular-head tenderness: false; Unable to flex knee to 90°: false; Unable to bear weight for 4 steps immediately and in evaluation: false Source: Stiell IG et al. Derivation of a decision rule for radiography in acute knee injuries. Ann Emerg Med (1995)
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Clinical inputs
- Age ≥55 years
- Isolated patellar tenderness
- Fibular-head tenderness
- Unable to flex knee to 90°
- Unable to bear weight for 4 steps immediately and in evaluation
Primary source
Stiell IG et al. Derivation of a decision rule for radiography in acute knee injuries. Ann Emerg Med (1995)
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