TBI Flashcards
how often are neuro check performed during early medical management of a TBI?
every 15-30 mins
what are the 3 components of the Glasgow Coma Scale?
eye opening
best motor response
verbal response
what is the lowest Glasgow Coma Scale score? highest?
lowest - 3
highest - 15
a Glasgow Coma Scale score of ____ indicates severe injury
3-8
Glasgow Coma Scale score of ___ indicates moderate injury
9-12
Glasgow Coma Scale score of ___ indicates mild injury
13-15
what does a Glasgow Coma Scale score of “T” mean?
cannot be scored
what are the limitations of the Glasgow Coma Scale?
pre-existing conditions (language)
aphasia
alcohol or other meds
other injuries
what is a local brain injury?
localized to the site of the impact on the skull
what is a diffuse brain injury?
widely scattered shearing of axons
(DAI)
what causes DAI?
high velocity impact
what are the primary brain insults?
local brain injury
diffuse brain injury (DAI)
what are the secondary brain insults?
raised ICP
intracranial infection
cerebral arterial vasospasm
hydrocephalus
post-traumatic epilepsy
brain edema
arterial hypoxemia
arterial hypotension
anemia
hyponatremia
intracranial hematoma
what is normal ICP?
0-10 mmHg WHILE SUPINE
what is abnormal ICP?
20 mmHg
what ICP is a contraindication to PT?
above 20 mmHg
what ICP causes neurologic dysfunction?
20-40 mmHg
what ICP causes death (almost always)?
60 mmHg
if a patient has a transcranial doppler result of a velcity over 100, what can be done in PT?
no OOB activities
supine exercises OK
ventricle will appear ____ with hydrocephalus
bigger
brain edema will causes the ventricles to appear ____
smaller
what condition is present in 1/3 of TBIs presenting to the ER and can be due to depressed breathing centers or drowning?
arterial hypoxemia
what condition is seldom produced in a TBI but can occur with GSW, long bone fx, and liver laceration?
arterial hypotension
what structures are hypoxic and ischemic brain damage most commonly seen in?
hippocampus
basal ganglia
scattered sites of cerebral cortex
cerebellum
(parts that requires the most O2)
which is more localized? hypoxia or ischemia?
ischemia
what color is normal CSF?
clear
what is the purpose of a ventriculostomy?
measures and drains CSF
via external ventricular drain (EVD)
what is the purpose of a bolt?
measures ICP only
the pressure transducer of an EVD should be level with ___
external auditory meatus
what must occur to the EVD prior to mobilization?
must be clamped
if can’t clamp, must have nurse to move it constantly