Who is the Canadian C-Spine Rule validated for?

Alert (GCS 15), stable adult patients presenting after blunt trauma with potential cervical spine injury. It is NOT validated for non-trauma neck pain, intoxicated patients, or those with a distracting injury preventing reliable assessment.

What counts as a dangerous mechanism?

Fall from height >1 m or 5 stairs, axial load to the head (e.g., diving), motor vehicle collision at high speed (>100 km/h) or with rollover or ejection, collision involving a motorized recreational vehicle, or bicycle collision.

What are the recognized low-risk factors?

Simple rear-end motor vehicle collision (not pushed into traffic, not hit by bus/large truck, no rollover, not at high speed), sitting position in the ED, ambulatory at any time since injury, delayed onset of neck pain, and absence of midline cervical spine tenderness.

How does this compare to the NEXUS criteria?

The Canadian C-Spine Rule (CCR) has been shown in head-to-head studies to be more specific than NEXUS (fewer unnecessary X-rays) while maintaining equivalent sensitivity. Both are widely accepted; many centers use CCR as the primary rule.

Does this tool replace clinical judgment?

No. This is a decision-support aid only. Always integrate the result with the full clinical picture, local protocols, and attending physician judgment before making a clearance decision.

Canadian C-Spine Rule — Cervical Spine Imaging Criteria, CCR

Summary

Apply the validated Canadian C-Spine Rule to decide whether cervical spine X-ray or CT is needed after blunt trauma.

How it works

Step 1 checks for high-risk factors that mandate imaging (age ≥65, dangerous mechanism, or paresthesias in extremities).
Step 2 checks for low-risk factors that allow a range-of-motion assessment.
Step 3 checks whether the patient can actively rotate the neck 45° left and right.
If no high-risk factor AND a low-risk factor is present AND rotation is possible, imaging is not required.
Any high-risk factor or inability to assess rotation triggers the imaging-required pathway.

Use cases

ED triage of alert, stable adults after motor vehicle collision.
Clinical decision support for fall-related neck pain evaluation.
Reducing unnecessary cervical spine X-rays in low-risk patients.
Teaching clinical decision rules to medical students and residents.
Documenting rational for imaging or clearance in the medical record.

Canadian C-Spine Rule

Patient Criteria