Lesson 9 Flashcards
CPP = ___ - ___
CPP = MAP - ICP
intracranial contents
brain tissue 80%
blood 10%
CSF 10%
Hypoventilation
vasodilation
increased blood volume
endless cycle
increased ICP = decreased CPP = decreased cerebral blood flow = ischemia = brain edema = increased tissue pressure
C3 compression =
blown pupil
once brain swelling starts (increased ICP)
cerebral cortex/RAS is activated decreased LOC activate hypothalamus = vomiting motor neurons activated and cause abnormal posture (decorticate/decerebrate posturing) brain can herniate
what happens when ICP = MAP
no cerebral blood flow
CPP = MAP - ICP
RAS =
reticular activating system
how does the body react to make up for the decreased cerebral blood flow when ICP increases
BP increases and the patient becomes bradycardia
respirations become fast (decreased CO2) or irregular (increased CO2)
O2 is a…
vasoconstrictor
CO2 is a…
vasodilator
6 neurologic exam components but we only do 4
mental status
cranial nerves
motor function (movement/feeling)
sensory function
important questions to know from Tim
what did you find
what did you do
how are they know
anisocoria
unequal pupils
if you cant move 1 or both eyes theres a neurological deficit between C nerves…
3, 4 and 6
skull fractures
linear
depressed
open/closed
basilar
needs a CT to know details
brain contusion
brain bruise
similar to concussion but with neurological abnormalities
intracranial hematoma types
epidural
subdural
intracerebral
epidural hematomas
temporal lobe involvement
subdural hematoma
results from tearing of veins between dura mater and arachnoid
how long do you suction?
until its not needed
if end tidal CO2 is up
increase ventilation effort
CPP means…
cerebral perfusion pressure
CBF means…
cerebral blood flow
