aER Review2

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  1. What are the AIS and ISS?
    Abbreviated Injury Score and Injury Severity Score.
  2. Lucid interval followed by acute deterioration in consciousness after a blow to the head is classically associated with...
    Epidural Hematoma
  3. What % of epidural hematomas have an associated skull fracture?
  4. Epidural Hematoma signs associated with worse outcome
    • EDH >2cm
    • Ongoing hemorrhage suggested by mixed densitities.
    • >1.5cm of midline shift.
    • Brainstem deformity.
    • Extensive associated injury.
  5. Low density area within an epidural hematoma suggests what?
    Hyperacute hemorrhage within a clot
  6. When is a subdural hematoma considered chronic? Peak incidence?
    • Present for greater than 3 wks and
    • Hypodense to brain parenchyma on CT.

    Peak incidence 60yo.
  7. T/F: 20% of patients with chronic subdural hematoma have either no h/o trauma or only minor injury.
    False. 50% of patients with chronic subdural hematoma have either no h/o trauma or only minor injury.
  8. When does Delayed Postraumatic Intracranial Hemorrhage occur? What are common clinical factors seen with delayed hemorrhage?
    • Most occur within a few hours of the initial injury.
    • >80% occur within 48 hours of injury.

    • ICP >30mmHg (nml <10mmHg)
    • Clinical deterioration of the patient
    • Failure of the patient to improve.
  9. Etiologies of SAH? (4)
    • Ruptured aneurysm
    • Trauma
    • AVM
    • Secondary to intraparenchymal hemorrhage
  10. Location of SAH blood suggests location of aneurysm rupture.
    Sylvian fissure -
    Posterior fossa -
    Cavum septum pellucidum-
    • Sylvian fissure - Ipsilateral MCA aneurysm
    • Posterior fossa - Posterior communicating artery aneurysm
    • Cavum septum pellucidum or interhemispheric fissure - Anterior communicating artery aneurysm
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aER Review2
2011-07-03 23:37:17
Trauma Radiology Review

Trauma Radiology Review
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