Skulls and facial Truama Flashcards
GCS 3 main categories?
Eye
Motor
Verbal
Typical CM for CT skull trauma
Nil Contrast
What can increased cranial pressure do the brain
Tonsillar Herniation
ST brain Windowing
WW= 100, WL= 40-50
3mm slice thickness
Skull bone window
WW=2000
WL= 200-300
2mm slice thickness
What typically does blood indicate in cisterns
Sub arachnoid heamorrage -> bleed into CSF
what can a ventricular effacement (thinning) or shift indicate?
intraventricular haemorrhage
what can fluid in sinuses or mastoid air cells signify?
Skull #
Briefly describe a extra/epi dural haemorrhage
Between dura and skull.
typically a skull #
Typically damage to MMA.
(doesnt tend to shift brain much due to strong dural layer holding blood back)
Describe a subdural haem.
Crescent shape between dura and arachnoid
Venous bleeding
Closed head injury
Describe a subarachnoid haemorrhage.
Between arachnoid and pia
follows surface of brain and CSF
Maybe intraventricular.
Describe intracerebral/ parenchymal haemorrhage
Tearing of brain parenchyma
associated with cerebral oedema
What usually attributes to cerebral contusions
and where are contusions typically missed?
Coup-Contrecoup
near Base of skull due to PVAvg.
Face position for CT facial bones?
Chin slightly raised
How to make CT mandible look like OPG
Recon with thicker slices
