Stroke, Cranial Nerves Flashcards
Cranial nerve 1, function, assessment
Olafactory (smell)
Have patient smell something like alc swab
Cranial nerve 2, function, assessment
Optic (vision)
Ask how many fingers/reading
Cranial nerve 3, function, assessment
Oculomotor (eye movement, pupil constriction)
H formation
Cranial nerve 4, function, assessment
Trochlear (eye movement)
H formation
Cranial nerve 5, function, assessment
Trigeminal ( face pain, touch, chewing)
Light touch to 6 spots on face
Cranial nerve 6, function, assessment
Abducens (eye movement)
H formation
What three cranial nerves are associated with eye movement?
Cranial nerves 3,4, and 6
Cranial nerve 7, function, assessment
Facial (facial movement) Facial expressions (symmetry)
Cranial nerve 8 and function
Vestibulaocular (hearing, balance)
Whisper in ear (we don’t test this one)
Cranial nerve 9 and function
Glossopharyngeal (taste, swallowing)
Say ah, swallow
Cranial nerve 10 and function
Vagus (throat and pharynx muscle)
Say ah, swallow
Cranial nerve 11 and function
Spinal accessory ( neck muscle movement) Shoulder shrug, hand against head on both sides
Cranial nerve 12 and function
Hypoglossal (tongue movement)
Check if tongue is midline
Infarction
Death of tissue due to diminished blood supply from obstruction of bv from blood clot or narrowing of bv
Penumbra
When an ischemic stroke occurs, some of the tissue damage still may be reversible/salvageable if perfused
What is tPA and when would it be used?
tPA (tissue plasminogen activator) is a clot buster; it breaks clots up to allow restoration of blood flow to brain
tPA can be used to revitalize penumbra
Hemiplegia
Total or nearly complete paralysis of one side of body, limiting movement
Hemiparesis
One sided weakness (some motor function remains in weakened area)
Expressive aphasia and causes
One is able to get out a few words at once due to difficulty finding the right words/expressing what they want
Causes: injury to speech/language center of brain from stroke or brain trauma
Receptive aphasia
Difficulty understanding language
TIA abbreviation
Transient ischemic stroke
What happens in a TIA and how long might it last
Cerebral artery temporarily blocked, decreasing blood flow to brain. This causes temporary reduced neuro function
Time: lasts around 15 min or less
What causes ischemic strokes
Ischemic strokes occur due to atherosclerosis in bvs —> piece of plaque break off and get lodged causing obstructed blood flow to brain
What causes hemorrhagic stroke
BVS stiffen from atherosclerosis, making them likely to rupture (stiffening = weaker). Blood accumulates in brain tissue —> increased ICP
SXS of stroke
Numbness or weakness of face, arm, leg unilaterally Speech difficulty Visual disturbances Severe sudden headache Confusion Altered mental status Difficulty walking Loss of coordination/balance
Risk factors of stroke (modifiable)
HTN, diabetes, smoking, diet, obesity, sleep apnea, afib, oral contraceptives, cocaine/amphetamines, high cholesterol, alcohol,
Non modifiable risk factors of stroke
Family hx, race (African American), 55 y.o>, male, TIA or previous stroke,
Why are African Americans at higher risk for stroke?
African Americans since increased risk HTN
What are some changes people can make to decrease their risk of stroke
Decrease alcohol intake Smoking cessation DASH diet Exercise Manage HTN Manage dyslipidemia Manage diabetes Healthy weight
Medical management of stroke (what does provider order?)
Anticoagulants (warfarin) Antiplatelets (aspirin, plavix) Stent placement in artery Bed rest Surgery (remove clot, stent placement, clipping aneurysm, cerebral revascularization, draining blood from intracranial space) O2 administration
Ischemic stroke treatment
Statins (artorovastatin) Antihypertensives (ACE inhibitors and diuretics) tPA Antiplatelets (aspirin) Endovascular treatment
What is the time frame to administer TPA? Why can’t we give it past this window?
3 hours
Can cause ischemic stroke to become hemorrhage or cerebral edema (increased ICP)
Hemorrhage stroke treatment
Bed rest with sedation Avoid extreme hypertension or hypotension (BP meds and monitoring BP) Anticonvulsant meds Surgery to evacuate blood Surgical clip
What is the significance of “last time patient was seen well?”
Determines onset of symptoms of stroke —> guides HCPs decisions for treatment
Avoids under treatment or over treatment
Determines if it is safe to administer tPA
We do not know the state of the penumbra if we don’t know the time frame
What is the time to save the penumbra
3 hours to revascularize it before dies completely
Why is it dangerous to give tPA past 3 hours? What can happen?
Cause more damage than benefit
If penumbra is dead, revascularization causes ischemic —> hemorrhage bc dead tissue can’t accept
What imaging is used to determine if the stroke is hemorrhagic or ischemic
CT scan
What is tPA? How does it work?
Tissue plasminogen activator
Protein breaks clots down
FAST (what does it stand for?)
Face droop
Arm weakness
Speech difficulty or slurred
Time to call 911
What are some manifestations of stroke
Numbness or weakness of face, arm, legs (on half of body) Frustration r/t loss of functions Confusion/ altered LOC Difficulty walking, dizzy Loss balance Sudden severe headache Visual disturbances
How does elevating bed help manage stroke
Decreased pressure in brain
How does O2 administration benefit stroke patients
Prevents brain tissue from starving and dying