w4 content Flashcards
2 types of cerebrovascular diseases
TIA
stroke/CVA (ischemic and hemorrhagic)
“cerebral vascular accident”
ischemic vs hemorrhagic stroke
_________ Patho:
- large area effected - bleeding into the brain tissue can affect a large area, leading to significant damage
- increase in ICP - The accumulation of blood increases ICP and causes inflammation, compressing surrounding brain structures.
- herniation - This can result in life-threatening herniation, where brain tissue is shifted and compressed against the skull.
- death - Unrelieved herniation, particularly of the brainstem, can cause respiratory arrest and death.
_________ Patho
1. decreased blood supply (from occlusion)
2. oxygen deprivation
3. neuro deficits w/in 1 min
4. continued loss of supply leads to irreversible damage
hemorrhagic
ischemic
Patho _______
1. infection of arachnoid mater and CSF
2. inflammatory response and pus secretion
3. increase in CSF production
4. increase in ICP
meningitis
Patho of ALS
1. ____________ in the brainstem and spinal cord gradually degenerate/die
2. can no longer produce or transport _________ to muscles
3. electrical and chemical messages from the _______ don’t reach the muscles
Patho
1. motor neurons in the brainstem and spinal cord gradually degenerate/die
2. can no longer produce or transport signals to muscles
3. electrical and chemical messages from the brain don’t reach the muscles
TIA vs stroke
__________ s/s
- varies between people, reoccurences look similar
- onset and recovery are abrupt
- s/s associated with location of defect
- s/s follow the effected vessel and whatever that vessel supplies blood to
Ex:
s/s carotid artery affected:
- weakness
- heaviness in contralateral arm, leg, or face
- numbness
- dysphagia – difficulty swallowing
- ipsilateral monocular visual loss - vision loss in one eye on the same side as the brain injury
s/s Vertebrobasilar area (back of brain) affected:
- dim or blurry vision
- vertigo
- dysphasia – difficulty speaking
- ataxia - lack of coordination and unsteadiness
- motor or sensory changes
- Ipsilateral face - same side of body as the brain injury
- Contralateral body - opposite side of the body from the brain injury
____________ s/s
- numbness/weakness on one side of body (face, arm, leg)
- sudden confusion
- trouble speaking
- dysarthria – slurred speech
- trouble seeing
- ataxia - lack of coordination and unsteadiness
- severe h/a
TIA
Stroke
Acute inflammation of the meningeal tissues of the brain and spinal cord
- meningeal tissue – made up of three meningeal layers (dura, arachnoid, pia) provide protection, cushioning, and a pathway for blood vessels supplying the central nervous system
Outer to inner:
1. dura mater
2. arachnoid
3. pia mater
Meningitis
TIA Diagnosis
- H&P
- Pattern
- History
- Vascular problems
- CT scan
- Rule out ________ stroke
- r/o Lacunar infarcts (small ischemic lesions)
- MRI/MRA
- r/o ___________
- carotid doppler studies
- can detect carotid stenosis
- echocardiogram
- assess for cardiac source
Diagnosis
- H&P
- Pattern
- History
- Vascular problems
- CT scan
- Rule out hemorrhagic stroke
- r/o Lacunar infarcts (small ischemic lesions)
- MRI/MRA
- r/o aneurysms
- carotid doppler studies
- can detect carotid stenosis
- echocardiogram
- assess for cardiac source
ischemic stroke Patho
1. __creased blood supply (from occlusion)
2. ______ deprivation to the brain
3. ______ deficits w/in 1 min
4. continued loss of supply leads to _________ damage
ischemic stroke Patho
1. decreased blood supply (from occlusion)
2. oxygen deprivation
3. neuro deficits w/in 1 min
4. continued loss of supply leads to irreversible damage
Treatment GBS
- cure?
- drugs
- steroid therapy
- high dose immunoglobulin therapy (IV) – shortens severity, duration, and length of stay
goal of drugs = reduce severity and accelerate recovery
Treatment
- no known cure
- drugs
- steroid therapy
- high dose immunoglobulin therapy (IV) – shortens severity, duration, and length of stay
- goal of drugs = reduce severity and accelerate recovery
stroke Complications/long term
1- _________ - eval for aspiration before giving anything PO, swallow study with barium and xray
2- Motor deficits and Sensory-perceptual problems
3- ________ on contralateral side - days to weeks after the stroke, the affected limbs are limp
4- ________ – within 6 weeks after stroke, the affected limbs have increased muscle tone and stiffness.
5- contractures
6-________ impairment (contralateral field blindness/homonymous hemianopia)
1- dysphagia - eval for aspiration before giving anything PO, swallow study with barium and xray
2- Motor deficits and Sensory-perceptual problems
3- Flaccidity on contralateral side (opposite side of the body from the brain injury) - days to weeks after the stroke, the affected limbs are flaccid/limp
4- spasticity – within 6 weeks after stroke, the affected limbs have increased muscle tone and stiffness.
5- contractures
6- visual impairment – contralateral field blindness/homonymous hemianopia - The visual field defect affects the opposite side from the brain injury
ischemic stroke etiology
__________ - blood clot that forms within an artery supplying blood to the brain. This causes an ischemic stroke by obstructing blood flow.
___________ – clot/debris that travels through the bloodstream from another part of the body and lodges in a cerebral artery, causing an ischemic stroke.
- thrombus
- embolus
________ stroke –
occlusion/clot stops blood supply to an area of the brain (cerebral artery)
- the area of the brain supplied by clogged vessel loses blood supply
_______ stroke –
blood leaks into brain tissue (parenchyma)
- associated with long standing, sever HTN
which is most common?
Ischemic
hemorrhagic
ischemic
stroke treatment
hemorrhagic vs ischemic
1. ABCs
2. CT scan
________ stroke treatment:
- reverse anticoagulation = antidotes
- manage HTN
- manage elevated ICP
- Raise HOB
- Give antipyretics if febrile
- Neutral position head
__________ stroke treatment:
- Alteplase
- penumbra procedure
hemorrhagic
ischemic
etiology
ischemic stroke vs hemorrhagic stroke?
1. thrombus
2. aneurysm
3. embolus
4. associated with long standing, sever HTN
5. mural thrombus
6. atrial fibrillation
7. venous clots (if there is an atrial septal defect or patent foramen ovale)
8. thrombus of vegetation on heart valve
9. Carotid plaque rupture
- I
- H
- I
- H
- I
- I
- I
- I
- I
stroke
BEFAST
B –
E –
F –
A –
S –
T –
B – balance – loss of balance, h/a, dizzy
E – eyes – sudden loss of vision
F – face – asymmetrical face
A – arm – weakness
S – speech – difficulty talking
T – Time – time is tissue, time to call 911
Acute ascending polyneuritis
Guillain-Barre Syndrome
GBS
Rare progressive neuro disorder characterized by the loss of motor neurons (upper and lower)
Acute inflammation of the meningeal tissues of the brain and spinal cord
auto immune disorder characterized by myelin sheath damaged caused by autoantibodies
acute inflammation of the brain
Accumulation of pus within the brain tissue
ALS
meningitis
GBS
encephalitis
Brain abscess
CT scan comparison
Ischemic stroke
- __________is darker on CT scan
Hemorrhagic stroke
- _________is lighter on CT scan
damaged tissue
blood
stroke treatment:
Treatment
- w/in __ hours is goal
- recognize s/s and get therapy
1st -
2nd -
initiate hemorrhagic or ischemic stroke treatment
Treatment
- w/in 3 hours is goal
- recognize s/s and get therapy
1st
ABC’s
- airway
- Airway obstructions
- breathing
- Check if person is breathing
- circulation
- Check for pulse (we want to know if heart is pumping blood around body)
2nd
- CT scan w/out contrast –r/o hemorrhage (determines if ischemic or hemorrhage stroke)
- MRI provides better image/detail but it takes longer
initiate hemorrhagic or ischemic stroke treatment
stroke Complications/long term
7- ______– issues with speaking or comprehending speech
8- ________ – impaired speech
9- ________ – imperfect speech sounds, word finding issues, incorrect use of words
10- _________ aphasia – comprehension intact but can’t express/communicate
11-_________ aphasia – can express/communicate but can’t comprehend/receive
12- depression
13- memory problems – names, words, objects
14- behavioral problems – emotional response, slow reaction times, hesitant, cautious, apathetic, confused, disoriented, doesn’t know own abilities
7- aphasia – issues with speaking or comprehending speech
8- dysphasia – impaired speech
9- dysarthria – imperfect speech sounds, word finding issues, incorrect use of words
10- expressive aphasia – comprehension intact but can’t express/communicate
11- receptive aphasia – can express/communicate but can’t comprehend/receive
12- depression
13- memory problems – names, words, objects
14- behavioral problems – emotional response, slow reaction times, hesitant, cautious, apathetic, confused, disoriented, doesn’t know own abilities
TIA
Risk factors
(1)
Complications
(1)
Risk factors
- male
Complications
- increased risk for stroke after TIA (highest risk within 1 month of TIA)
thrombus ischemic stroke vs embolus ischemic stroke
s/s and treatment is ________
etiology and prevention is________
similar
different
etiology
- viral
- West Nile ______ (from mosquitos)
- Measles, chicen pox, mumps
- HSV1 – herpes simplex virus (Herpetic _______ is a potentially life-threatening viral infection of the brain caused by the herpes simplex virus (HSV), s/s occur rapidly)
Etiology –
- unknown
- excitotoxicity hypothesis (theory)
Etiology
- infection from various places cross the BBB
- lungs
- bloodstream
- penetrating wounds
- bacterial infections
- strep. Pneumoniae (pneumococcus)
- Neisseria meningitidis (meningococcus)
- viral infections
- Enteroviruses
etiology
- viral infection – most common
- bacterial infection – campylobacter jejuni – food borne illness
- post surgery
Etiology
- local or systemic infection
- most common: (b/c close to brain from bacteria to gain access)
- Ear infection
- Tooth infection
- Sinus infection
- Mastoid infection
- most common organizations:
- Streptococci
- Staph aureus (found on skin)
encephalitis
ALS
meningitis
GBS
brain abscess
3 classic s/s
- fever!!
- h/a!!
- stiff neck!!
what does positive kernig sign and positive Brudzinski sign indicate?
meningitis
meningitis