4.2 - TRAUMA Flashcards
leading cause of death in children and young adults
trauma
3 neurosurgical areas
traumatic brain injury
spinal cord injury
peripheral nerve injury
open fractures require
Debridement and scalp repair
indications for craniotomy
depression > cranial thickness
intracranial hematoma
frontal sinus involvement
craniotomy CI in skull fractures like?
dural venous sinus
fracture of the temporal bone leading to extravasation of the blood behind the ear
battles sign
raccoon eyes
anosmia
rhinorhea results from what fracture?
anterior skull base
a drop of fluid into an absorbent tissue. result shows red spot in the middle and surrounding layer
halo test
if halo test is indeterminate, what test to order?
beta-2 transferrrin testing
common tx for CSF leaks
elevate head for several days
lumbar drain
tx for facial nerver palsies
steroids
most common type of TBI
closed head injury
patients with a documented CHI and evidence of intracranial hemorrhage and depressed skull fracture should receive
17mg/kg phenytoin LD
300-400mg/d phenytoin
peptic ulcers occuring in patients w head injury
cushings ulcers
moderate head injury
gcs 9-12
risk in a patient: headache, dizziness, no loss of consciousness
low risk. can be discharged w/o CT
risk in a patient: depressed consciousness, changing neuro exam..
high risk. CT and then admit
temporary neuronal dysfunction following nonpenetrating head trauma
concussion
grade concussion based on the colorado grading system
1, px with amnesia
2, lost consciousness
grade2
grade 3
refers to when brain is more susceptible to minor head trauma in the first 1-2 weeks after concussion
second impact syndrome
bruise of the brain, impact causes breakage of small vessels; appear bright on CT
contussion
contussion occuring in the opposite site of i9njury
contrecoup injury
two main subtypes of penetrating (CHI)
missile (bullets) non missile (knife)
types of intracranial hematomas
epidural
subdural (acute and chronic)
intraparenchymal
stage wherein EDH subclinically expands
lucid interval (patient is awake)
EDh rarely occurs in
posterior fossa
conservative management for EDH when all criteria is met
clot volume
results from venous bleeding, typically from bridging vein from cerebral cortex to dural sinus
subdural hematoma
higher risk population to have SDH d/t brain atrophy
elderly and alcoholic
tor F: SDH cross the midline
F, no d/t falx
indication for craniotomy in SDH
thickness >1cm
midline shift >5mm
gcs drop of 2pts
at 2-3 weeks CT scan reading of SDH
hypodense
hyperdense up to ?
3 days
small bleeds that expands the collection
acute - on -chronic SDH
placed in order to prevent reaccumulation of blood
subdural/subgalcal drains
isolated hematomas/ intraparenchymal hemorrhage are d/t?
hypertensive hemorrhage
AV mal
indication for craniotomy with IPH
- clot volume >50cm
- clot volume >20cm with neuro deterioration (gcs6-8)
- midline shift >5mm, basal cistern compression
violation of the vessel wall intima
dissection
intradural dissection may present w
SAH
angiographic abnormality in dissection
string sign
surgical options for dissection
vessel ligation and bypass grafting
presents with pulsatile proptosis, , retroorbital pain, loss of normal eye movement
carotid cavernous fistula
tx for ccfs
balloon occlusion
causes of vertebrobasilar dissection
- sudden rotation of the neck
- chiropractic manipulation
- direct blow to the neck
Rule of spence
7mm or greater
Ondontoid type? Tip only
1
C2 is broken
Hangmans fracture
Failure of anterior column
Compression fravture
Failure of anterior and middle column
Burst fracture
Middle and posterior failure
Chance
All columns
Fracture-dislocation
Least severe. Pn injury
Neuropraxia
Most severe
Neurotmesis
Brachial plexus types
Erb palsy
Klumpke palsy