Screening test for whether knee x-rays are indicated in acute knee injuries.

This test should not be applied to patients with significant trauma, obvious deformity, or patients who are unable to provide reliable history / physical exam.

Sensitivity 98-100% for identification of knee fractures (95% CI: 94% - 100%).

Stiell, IG et al. Prospective Validation of a Decision Rule for the Use of Radiography in Acute Knee Injuries. JAMA. 1996; 275(8):611-615. Text