Ottawa Knee Rule for use of X Ray in Knee Injury

Select Criteria:
History and Physical Criteria
Age 55 or older (1 point)
Isolated tenderness of patella (no bone tenderness of knee other than patella) (1 point)
Tenderness of head of fibula (1 point)
Inability to flex to 90 degrees (1 point)
Inability to bear weight both immediately and in the emergency department for 4 steps (1 point)
Results: Total Criteria Point Count:
Ottawa Rule Findings
0 findings:X-Ray not indicated
1-5 findings:X-Ray Indicated
  1. Stiell IG, Greenberg GH, Wells GA, et. al. Prospective validation of a decision rule for the use of radiography in acute knee injuries. JAMA. 1996 Feb 28;275(8):611-615.
  2. Stiell IG, Wells GA, McDowell I, et. al. Use of radiography in acute knee injuries: need for clinical decision rules. Acad Emerg Med. 1995 Nov;2(11):966-73.
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