EBMcalc Medical Calculator

Ottawa Knee Rule for use of X Ray in Knee Injury

The EBMcalc module Ottawa Knee Rule for use of X Ray in Knee Injury is available in EBMcalc Complete Edition.

This calculator yields the following results:

Ottawa Score

Equation parameters include:

Age
Isolated tenderness of patella (no bone tenderness of knee other than patella)
Tenderness of head of fibula
Inability to flex to 90 degrees
Inability to bear weight both immediately and in the emergency department for 4 steps

References

EBMcalc CrossRef: Pittsburgh Knee rule
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. PubMed ID: 8594242
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. PubMed ID: 8536122

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