Ottawa knee rules calculator
Ottawa Knee Rules
| Criteria | No (0) | Yes (+1) |
|---|---|---|
| Age ≥55 years | 1 | |
| Tenderness at head of fibula | 1 | |
| Isolated tenderness of patella (no other knee bone tenderness) | 1 | |
| Inability to flex to 90° | 1 | |
| Inability to bear weight (4 steps both immediately and in ED) | 1 | |
| Criteria Met | / 5 | |
| Interpretation | |
|---|---|
| 0 | X-ray NOT indicated — No Ottawa Knee Rule criteria met. Sensitivity 98.5% for fracture. |
| ≥1 | X-ray indicated — One or more criteria met; obtain knee radiographs to evaluate for fracture. |
| References |
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