Teaching Points
- Ottawa Rules in acute knee injury -
- Age ≥ 55
- Tenderness at the head of the fibula
- Isolated tenderness of the patella
- Inability to flex knee to 90 degrees
- Inability to walk 4 weight bearing steps
- Initial plain films of the knee are indicated when any of the above indications are present
- MRI is useful for the detection of ongoing knee instability following trauma to the knee, as it is able to accurately delineate the soft tissues of the joint
- CT has a lesser role in the assessment of post traumatic knee pain, though it is useful in demonstrating subtle bony injury and loose bodies within the knee joint
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