Pittsburgh knee rules

Pittsburgh knee rules

(pits′bŭrg″)
A clinical prediction rule used to determine whether an individual requires plain x-rays to rule out a knee fracture after an acute or blunt injury. Predictive variables include a fall or blunt trauma as the mechanism of injury, inability to ambulate initially or in the ER (i.e., the inability to take four steps), or patients younger than 12 or older than 50.
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The Pittsburgh knee rules indicate radiography if the mechanism of injury is blunt trauma or a fall, and either (1) the patient is younger than 12 or older than 50 years of age or (2) the injury causes an inability to walk four weight-bearing steps in the ED.
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