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| ==Canadian CT Head Rule==
| | #Redirect[[Clinical decision rules for head CT in trauma]] |
| Not applicable for non-trauma, GCS<13, Age <16, Bleeding disorder or on anti-coagulation (e.g. Coumaidn, Debigatran), Obvious open skull fracture.
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| ===If ANY High Risk factor present – then get a CT Head ===
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| # Age >65 years | |
| #Suspected Open or Depressed skull fracture
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| #Signs suggesting Basal skull fracture
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| ## Hemotympanum
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| ## Racoon eyes
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| ##CSF otorrhea or rhinorrhea
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| ##Battle sign
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| #Vomiting > 2 times
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| #GCS <15 at 2 hours post injury
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| ===If ANY Medium Risk factor present – then get a CT Head===
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| # Amnesia before impact >30min
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| #Dangerous mechanism
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| ##Pedestrian struck by vehicle
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| ##Ejection from motor vehicle
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| ##Fall from elevation >3 feet or 5 stairs
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| ==Canadian rule vs. New Orleans vs. Nexus II rules==
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| Comparison done to evaluate Sensitivity and Specificity for clinically important intracranial injuries
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| ===Sensitivity===
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| Canadian 99% vs New Orleans 99% vs. Nexus II 97%
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| ===Specificity===
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| Canadian 47% vs. New Orleans 33% vs. Nexus II 47%
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| ==Source==
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| #Ann of Emerg Med 2009; 53, 2:180-188.
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| #http://www.ohri.ca/emerg/cdr/cthead.html
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| [[Category:Trauma]]
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| [[Category:Neuro]]
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| [[Category:Rads]]
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