Canadian C-Spine Rule

Stiell IG, Wells GA, Vandemheen KL, et al. The Canadian C-Spine Rule for radiography in alert and stable trauma patients. A three-step rule (high-risk factors, low-risk factors permitting range-of-motion testing, active 45° rotation) that was 100% sensitive for clinically important cervical spine injury and would have cut imaging substantially.

Stiell IG, Clement CM, McKnight RD, et al. The Canadian C-Spine Rule versus the NEXUS low-risk criteria in patients with trauma. In a head-to-head comparison the Canadian C-Spine Rule was more sensitive (99.4% vs 90.7%) and more specific for important injury.