Emergency Medicine · Orthopaedics

Pittsburgh Knee Rule calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Blunt trauma or fall as mechanismAge younger than 12 or older than 50 yearsUnable to walk four weight-bearing steps in the ED

Result

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Pittsburgh knee rule negative

Band: Pittsburgh knee rule negative

Interpretation. Pittsburgh knee rule negative

Suggested management. Interpret only within the cited source population and criteria; use alongside complete clinical assessment.

Pittsburgh Knee Rule: 0 — Pittsburgh knee rule negative. Interpretation: Pittsburgh knee rule negative What to do: Interpret only within the cited source population and criteria; use alongside complete clinical assessment. Inputs: Blunt trauma or fall as mechanism: false; Age younger than 12 or older than 50 years: false; Unable to walk four weight-bearing steps in the ED: false Source: Seaberg DC, Jackson R. Clinical decision rule for knee radiographs. Am J Emerg Med. 1994;12:541-543. DOI: 10.1016/0735-6757(94)90274-7. PMID: 8060409. Validated in Seaberg DC et al. Ann Emerg Med. 1998;32:8-13 (PMID 9656942). Scope: positive (1) when mechanism is blunt trauma or fall AND either age <12 or >50 years OR inability to walk four weight-bearing steps in the ED. (1994)

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Clinical inputs

Blunt trauma or fall as mechanism
Age younger than 12 or older than 50 years
Unable to walk four weight-bearing steps in the ED

Primary source

Seaberg DC, Jackson R. Clinical decision rule for knee radiographs. Am J Emerg Med. 1994;12:541-543. DOI: 10.1016/0735-6757(94)90274-7. PMID: 8060409. Validated in Seaberg DC et al. Ann Emerg Med. 1998;32:8-13 (PMID 9656942). Scope: positive (1) when mechanism is blunt trauma or fall AND either age <12 or >50 years OR inability to walk four weight-bearing steps in the ED. (1994)

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