Emergency Medicine

Canadian CT Head Rule Calculator

CT decision rule for adult minor head injury

Calculate Canadian CT Head

Clinical use

Use this calculator for ct decision rule for adult minor head injury in theemergency medicine workflow. It is decision support and should be interpreted with the patient context, local protocols, and clinician judgment.

Interpretation

For GCS 13-15, age ≥16. High-risk criteria: GCS<15 at 2h, suspected skull #, basilar skull # signs. Medium-risk: vomiting ≥2, age ≥65, amnesia ≥30min, dangerous mechanism.

Required inputs

Gcs < Than 15 At 2 Hours
Suspected Skull Fracture
Signs Of Basilar Skull Fracture
Vomiting 2 Or More Episodes
Age 65 Or More
Amnesia 30 Min Or More
Dangerous Mechanism

Evidence and limitations

This page cites 1 published reference. Confirm units and inclusion criteria before applying the output; calculators do not replace assessment, escalation, or local policy.

References

Stiell IG et al. Lancet 2001;357:1391-1396

Frequently asked questions

What is the Canadian CT Head Rule?

Canadian CT Head Rule is a clinical calculator used for CT decision rule for adult minor head injury.

How do I interpret the Canadian CT Head Rule?

For GCS 13-15, age ≥16. High-risk criteria: GCS<15 at 2h, suspected skull #, basilar skull # signs. Medium-risk: vomiting ≥2, age ≥65, amnesia ≥30min, dangerous mechanism.

What inputs are required for the Canadian CT Head Rule?

Required inputs include Gcs < Than 15 At 2 Hours, Suspected Skull Fracture, Signs Of Basilar Skull Fracture, Vomiting 2 Or More Episodes, Age 65 Or More, Amnesia 30 Min Or More, Dangerous Mechanism.