Template:Special Test
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Purpose
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A decision rule used to determine the need for radiographs in acute knee injuries.
Technique
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The decision rule is applied to any patient presenting with an acute knee injury. Ifany of the 5 following findings are present, the patient should have radiographic examination.
1. Age 55 or older
2. Isolated tenderness of the patella (no bone tenderness of knee other than patella)
3. Tenderness of the head of the fibula
4. Inability to flex to 90 degrees
5. Inability to bear weight both immediately and in the emergency department for 4 steps (unable to transfer weight twice on each lower limb regardless of limping)
Evidence
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