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decision rule

NEXUS · NEXUS Criteria for C-Spine Imaging

5 items · 1 min · Imaging required / not required · not scored

1 Before you use it

What it is

Five criteria, all of which must be absent to clear the neck clinically. No midline cervical tenderness · no focal neurological deficit · normal alertness · no intoxication · no painful distracting injury.

Any one present → image.

When to reach for it

Any traumatic neck presentation — as the quick screen, or beside the Canadian rule as the reasoning exercise.

"Painful distracting injury" is the criterion that carries the judgement, and it is worth asking a student to define it out loud before they use it.

2 Giving it

Scoring

Not scored. It is a checklist, and it is deliberately simpler than the Canadian C-Spine Rule — five yes/no items with no ordering and no range testing.

What it doesn’t measure

Anything about ongoing function, or about cervical arterial dysfunction. Screen those separately.

3 Reading the score

Interpreting it

A sensitive rule-out. No verified accuracy figure is carried in our library and none is printed here.

The honest teaching point is the comparison. NEXUS is faster and needs no movement; the Canadian C-Spine Rule is more structured and asks the patient to rotate. They do not always agree on the same patient, and knowing that is more useful to a student than memorising either one.

Is the change real?

No verified MCID or MDC is carried in our library for this measure, so the number on its own cannot tell you a change is real. Compare it to this patient's own baseline and say what changed functionally.

Student trap. Recording "alert" without checking, and calling a sore shoulder a distracting injury when it isn't. Both criteria are judgement calls, and both get waved through.

Official source: trauma.reach.vic.gov.au. We don't host the form.

This is a learning tool. It does not diagnose patients and does not replace your clinical educator.

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