What are the NEXUS criteria?

Five low-risk criteria: no posterior midline tenderness, no focal neurological deficit, normal alertness, no intoxication, no painful distracting injury. ALL must be absent to clear the c-spine.

How sensitive is NEXUS?

99.6% sensitivity for clinically significant c-spine injury. It missed 8 of 818 injuries in the original study, but none required surgical intervention.

How does NEXUS compare to Canadian C-Spine Rule?

The Canadian C-Spine Rule has slightly better sensitivity and specificity. However, NEXUS is simpler to apply and is more widely used in the US.

Online Medical Tools — NEXUS C-Spine

Printed on 2/13/2026

For informational purposes only. This is not medical advice.

Emergency

NEXUS C-Spine

The National Emergency X-Radiography Utilization Study (NEXUS) criteria identify trauma patients who can have their c-spine cleared clinically without imaging. All 5 criteria must be absent to safely forego imaging, with 99.6% sensitivity for clinically significant cervical spine injuries.

Compare with Canadian Head CT

Formula: All 5 criteria absent → c-spine can be cleared. Any criterion present → imaging recommended.

Disclaimer: This tool is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about your health.