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40 Cards in this Set

  • Front
  • Back
Clinical features of Basilar artery occlusion
Oculomotor deficits and or ataxia with "crossed" sensory and motor dficits
Clinical features of Vertebral Artery occlusion.
Lower cranial nerve deficits and/or ataxia with crossed sensory deficits.
Unilateral Visual Impairment Numbness or weakness of an extremeit or aphasia Symptoms of a stroke mean...
They have CAROTOID dz (usually just one of the cartoid).
Bilateral Vision impairment, bilat weakness, ataxia (weak gait) or amensia
Global problems, These suggest veterbral basilar dz.
TIAs give a pt a higher risk for....
Stroke
A pt who has a stroke, you should consider...
-They have alerations in CO2 responsivness in the BBB 4-6 weeks after surgery.
-Elective surgery should be delayed 6 wks after a CVA.
-Very careful with muscle relaxants.
-Nerve stimulation or normal side
-If you put on weak side, you will overdose muscle relaxant.
CVA's and NDMB
Be sure to judge twiches on non-paralyzed side because of up regulation. More receptors present and pt will be resistant to NDMB. Sch given to these pts with marked up regulation will have hyperk+.
Conditions associated with AchR upregulation
Spinal cord injury
Stoke
Burns
Prolonged immobility
Prolonged exposure to NMB
MS
GBS
Conditions associated with AchR Down regulation
Myasthenia Grvavis
Anticholinesterase poisoning
Organophosphate
Where does CSF start?
At the choroid plexus and goes to be absorbed in the villi of the arachnoid membrane in the brain.
Hydrocephalus can be caused by...
obstructive outflow of csf pathway.
Can be caused by cancer, trauama, mennigitis, subarachnoid hemmorrage.
Pathway of normal CSF flow...
Choroid plexus->formen of Monro->Third ventricle-> Aqueduct of sylvius-> 4th ventricle->foramen of luschka OR formaen of Magendie-> into cisterna magna->pool of CSF at base of brain.
What is the Foramen of Luschka?
One of the two possible ways CSF can travel to the base of the brain.
What is the Foramen of Magendie?
Where the CSF travels from the 4th ventricle down through either these pathways (either magendie or luschka) and into the cisterna magna and then into the subarachnoid space.
Where is CSF reabsorbed?
From the subarchnoid space CSF is reabsorbed in the arachnoid villa and enters the venous blood.
Generalized sz's
Involves the neurons bilaterally.
Subcortical or deep sz focus in the brain. Conciousness is always impaired. Deep in brain (subcortical)= generalized sz
Partial Sz or focal Sz
usually unilateral and conciousness is usually maintained.
Anesthetic management of people who have sz...
Pt w/ sz are at risk for having post-op sz.
Barbs, benzos, propofol...increase the sz threshold.
Avoid: ketamine, reglan, methohexital. etomidate can cause spikes in EEG
Dilantin-need more NMB
Metabolite of atricurium and cis: Laudanosine has CNS stim effects...avoid in pt w/sz
Manage the airway.
Complications with pts with sz
Sz increase 250% in ATP usage and cerebral O2 demand by 60%. A deficient of glucose and ATP can occur and then lactate accumulates in the brain.
-Sz pts can run out of ATP or O2 and can have ischemic brain injury
What can cause sz like activity other than sz?
Propofol-myoclonus
Etomidate-jerking movements
Sch-fasiculations
Inadequate reversal-floppy fish like movements
LA toxicity can cause actual sz (intravenous or overdose).
Avoid sch in.....
Marked muscle atrophy, marked up regulation, children under 18 (bc of MD possib)
LMN dz
Progressive muscular atrophy
Muscular dystrophys
MG
Bulbar palsies
UMN ...other name
pyramidal tract (brain and 1st synapse)
LMN other name
Extrapyramidal tract
Bulbar palsies...CN nerves affected>? And what part of the body is affected?
CN 9, 10, 12 injury
Injury to the myencephalon
Extra-pyramidal tract...causes injury to the face, jaw, pharynx and tongue. Pts have difficulty swallowing
Extrapyramidal motor syndromes-Cerebellar disorders
Loss of muscle tone, difficulty coordinating movement, muscle weakness on the ipslateral side.
Extrapyramidal Motor syndromes-
Basal ganglia
Too much dopamine- causes hyperkinesia. Imbalance of dopaminergic and choinergic activity. Ach and dopamine are usually in balance in the basal ganglia.
Increased Ach in the basal ganglia causes....
out of balance, causes Akinesia in basal ganglia
Increased Dopamine in the basal ganglia causes...
too much causes hyperkinesia.
marked upregulation happens in ...
Muscle atrophy. Worry about muscle relaxants w/ people who have neuromuscular disorders, respiratory insuffiency (no deep breath and cough).
People with NMD and respiratory insufficiency
major cause of death
Progressive resp insufficency/dz
ALS
Reversible resp insufficiency/dz
GBS...can resolve
Reversible w/ therapy resp insufficiency/dz
MG
Relapsing resp insufficiency/dz
MS...comes and goes...
Muscular disorders as associated with
cardiac dysfuct
Autonomic nervous system dysfct.
S/sx of dysautonomia
resting tachycardia
orthostatic hypotension
venous pooling
hypovolemia
decreased contractility
-use phenylephrine to treat hypotension (direct acting vasopressor).
UMN diseases
MS,
Parkinsons dz
CVA
Trauma
LMN dz occur at what level?
Below T12...flaccid paralysis below level of injury
UMN occur
in the anterior horn...
Spastic paralysis and hyperreflexia.