Critically Ill Patients with Neuro Problems (12) Flashcards
Brief interruption in cerebral blood flow
TIA and RIND
treatment for TIA and RIND
neuro assessment
CT scan, lab
possible admission
drug therapy = clopidogrel
what is a stroke (brain attack)
change in normal blood supply to brain
causative agents of stroke
hypertension arteriovenous malformation (born with it)
types of stroke
ischemic (thrombolic and embolic)
hemorrhagic
Types of stroke and onset
thrombotic = gradual onset embolic = sudden onset hemorrhagic = sudden onset
what does arteriovenous malformation look like
dilated, entangled blood vessels
risk factors for stroke
smoking alcohol abuse obesity sedentary lifestyle oral contraceptive use heavy alcohol use use of PPA (no longer produced in US)
early intervention for stroke
Face Arm weakness Speech difficulty Time to call 911 Chew 325 mg of aspirin stat!
rtPA eligibility criteria
last seen normal less than 3 hours
can extend to 4.5 hours
age
goal of ED door to tx timeframe for stroke
and neuro asessment timeline
Damage to right hemisphere (LUDDI)
Loss of depth perception Unilateral body neglect syndrome Disorientation Denial of Illness Impulsiveness
Damage to left hemisphere (AAARI)
Anger, anxiety, frustration Aphasia, alexia, dyslexia Acalculia Right visual field Intellectual impairment
when can intra-arterial thrombolysis be done
within 6 h of LSN
drug therapy for CVA
thrombolytics anticoagulants (ASA, plavix) lorazepam CCB stool softeners analgesics for pain antianxiety meds
primary brain tumors originate in ______ and secondary to _________ in other parts of body
CNS
mestastasis
med used to decrease fluid in brain
med used to control ICP*
mannitol
dexmethasone
why is protonix needed?
steroids can cause stomach ulcers
3 things that increases ICP
fever
pushing when pooping
N/V
post op care for craniotomy
fluid balance assess site monitor ICP NO FEVER DVT helmet for immobolization high risk aspiration due to altered LOC
removal of pituatary tumor through nasal approach
transphenoidal hypophysectomy (TPH)
complications of TPH
air embolism
CSF leak
visual disturbances
diabetes inspidus = water imbalance in body
CSF leak can lead to
meningitis
post op care
do not blow nose! HOB elevated hourly UOP monitor electrolytes monitor for visual disturbances
Berry aneurysm occurs where
anterior communicating artery of the brain
Fusiform aneurysm occurs where
any blood vessel supplying the brain
1st sign of ICP and what happens to eye and pulses
decreased LOC
papilledema = “filling up” of the optic cup and dilation of the retinal veins
widened pulse pressure
Cushings triad
systolic hypertension
bradycardia
abnormal respirations
normal ICP level
borderline = compensating
moderately high
5 to 15 mmHg
10-20 mmHg
20-40 mmHg
start treatment when ICP > ____ that is sustained over ____
20 mmHg
5 minutes
Factors of CPP
acidosis = dilation, increased CBF alkalosis = constriction, decreased CBF
CPP calculation
CPP=MAP-ICP
Normal CPP
hypoperfusion level
brain ischemia level
70-95
target MAP and what may it induce
90
hypertension to increase ICP
what two interventions for decreased CPP
hyperventilation (only when herniating) and oxygenation
when to intubate?
GCS
hypoxia and hypotension = ____% mortality
intervention?
75
uses 100% FiO2, early resus
when do you not give mannitol
serum osmo
what is herniation
where does it occur most often
shifting of tissue from one compartment to another
cerebrum (supratentorial)
which type of herniation is considered a late sign and emergent
tonsillar
tonsils of cerebrum shift through the foreman magnum and into the spinal canal
open vesticuostomy
certain level reached, chamber drains
closed vesticuostomy
monitoring only, no drainage
where is the zero reference point
foramen of monroe (at ear level)
Name ICP waveforms (EVD closed system)
“giving middle finger” = bad
P1 = percussion
P2 = tidal
P3 = dicrotic
Cerebral aneurysm SAH symptoms
sudden onset ha
brief LOC
N/V
kernigs sign, brudzinskis sign, photophobia
Why is SAH considered an emergency and what must be done
direct effect of hemorrhaging and a craniotomy must be done within 48 hours
SAH preop
keep calm dark environment KEEP BP LOW bed rest no straining DVT precautions
SAH post op and what can lead to death
Triple H Hemodilution = fluid Hypertension= increase BP and CO Hypervolemic= volume expanders vasospasms can lead to death
use isotonic fluids to prevent
hyponatremia
what other two complications of SAH and interventions
rebleeding - assess for sudden onset ha, increased BP, and resp change
hydrocephalus - ventriculostomy = temporary or shunt = permanant
traumatic brain injury is similar to
spinal cord injury
primary injury occurs
contact
acceleration - deceleration
rotational
secondary injury occurs
cerebral ischemia
know this!
degrees of TBI
mild (grade 1) mod (grade 2) severe(grade 3)
LOC 6h
CT/MRI normal CT/MRI abnormal CT/MRI abnormal
GCS 13-15 GCS 9-13 GCS7d
sudden transient mechanical injury with disruption of neural cavity with AMNESIA REGARDING EVENT
concussion
post concussive syndrome timeline
2 w to several months
progressive brain disease caused by REPEATiTIVE HEAD TRAUMA occurring mostly in sports
CTE or chronic traumatic encephalopathy
what is CTE patho
Tau proteins become toxic and start dying
what diseases are liked to CTE
parkinsons
dementia
ALS
Skull fractures
FAR and BMB
frontal or orbital fracture - anterior fossa - racoon eyes
basal fracture - middle fossa- battle sign (behind ear)
major complications
CSF leak
rhinorrhea (mucus in nasal cavity)
otorrhea (drainage from ears)
what hematoma is associated with skull fractures
epidural hematoma
damage occurs where
dura, veins, and arteries
symptoms of epidural hematoma
IMMEDIATE LOC, then alert, than rapid decline
dilated, fixed pupil on same side of injury
surgical intervention and when
craniotomy at 72 h (when ICP greatest)
what hematoma occurs with MVA, falls, trauma
subdural hematoma
timeline for subdural hematoma
acute = first 48 h subacute = 2d to 2w chronic = 2w to several months
damage to white matter of brain causing coma
DAI or diffuse axonal injury
timeline for severity
mild = coma 6-24h, follow commands after 24h moderate = coma >24h, no brainstem signs severe = coma prolonged, prominent brainstem signs