Prospective cohort study across 10 Canadian EDs enrolling 8,924 alert, stable blunt-trauma patients. The goal was to derive a clinical decision rule identifying which patients require cervical spine radiography and which can be safely cleared without imaging. This is the derivation paper for the Canadian C-Spine Rule.
Before this rule, C-spine radiography ordering in alert, stable trauma patients varied up to 6-fold among attending emergency physicians, with more than 98% of films negative for fracture — a textbook example of clinical practice driven by fear rather than evidence.
When you evaluate an alert (GCS 15), hemodynamically stable blunt-trauma patient, apply the rule sequentially: first check for any high-risk feature (age ≥65, dangerous mechanism, paresthesias). If present, image without further assessment. If no high-risk feature, look for any low-risk feature; if present, test active rotation. Only patients who clear all three steps can be released without imaging.
Do not use this rule if GCS is below 15, vital signs are abnormal, or the patient has known vertebral disease (ankylosing spondylitis, rheumatoid arthritis, prior cervical surgery). These were explicit exclusion criteria.
This is a derivation study only. The 2003 Stiell et al. Validation paper in NEJM prospectively confirmed 100% sensitivity and demonstrated head-to-head superiority over NEXUS, which is why the Canadian C-Spine Rule is now the standard in most high-volume trauma centers.
The Canadian C-Spine Rule for Radiography in Alert and Stable Trauma Patients.
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Prospective cohort study across 10 Canadian EDs enrolling 8,924 alert, stable blunt-trauma patients. The goal was to derive a clinical decision rule identifying which patients require cervical spine radiography and which can be safely cleared without imaging. This is the derivation paper for the Canadian C-Spine Rule.
Before this rule, C-spine radiography ordering in alert, stable trauma patients varied up to 6-fold among attending emergency physicians, with more than 98% of films negative for fracture — a textbook example of clinical practice driven by fear rather than evidence.
When you evaluate an alert (GCS 15), hemodynamically stable blunt-trauma patient, apply the rule sequentially: first check for any high-risk feature (age ≥65, dangerous mechanism, paresthesias). If present, image without further assessment. If no high-risk feature, look for any low-risk feature; if present, test active rotation. Only patients who clear all three steps can be released without imaging.
Do not use this rule if GCS is below 15, vital signs are abnormal, or the patient has known vertebral disease (ankylosing spondylitis, rheumatoid arthritis, prior cervical surgery). These were explicit exclusion criteria.
This is a derivation study only. The 2003 Stiell et al. Validation paper in NEJM prospectively confirmed 100% sensitivity and demonstrated head-to-head superiority over NEXUS, which is why the Canadian C-Spine Rule is now the standard in most high-volume trauma centers.