CHORUS
Collaborative Hypertext of Radiology
Nervous system
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epidural hematoma
- 2% of all serious head injuries
- uncommon in infants
- associated with skull fracture in 40-85%
- mechanism of injury:
- laceration of dural vessels from calvarium fracture (91%)
- avulsion of venous vessels from points of calvarial perforations
- disruption of dural sinuses (major cause in kids)
- transient loss of consciousness; lucent interval
- 3rd nerve palsy (sign of cerebral herniation)
- somnolence 24-96 hrs after accident (medical emergency)
- types:
- acute (58%) from arterial bleeding
- subacute (31%)
- chronic (11%) from venous bleeding
- location:
- temporoparietal (66%): middle meningeal artery tear
- frontal pole, parieto-occipital region, between occipital
lobes, posterior fossa: laceration of venous sinuses
Yong H. Hahn, MD - 2 February 1995
Last updated: 1 October 2013
Copyright © 2013, Charles E. Kahn, Jr.
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