jason haag intern conference. case 34 y.o. with h/o seizure disorder presents to ed with increased...
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Jason HaagIntern Conference
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Case34 y.o. with h/o seizure disorder presents to
ED with increased seizure frequency. He states he’s had 4 tonic-clonic seizures over the past 24 hours.
He has a 6 year history of epilepsy treated with carbamazapine 400 mg po bid. He notes increased nausea, vomitting, and diarrhea over the last week which made him unable to take his meds.
No fever, new medications, trauma or alcohol abuse
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CasePhysical Exam
Mildly low BP (100/60)Lethargic, but able to follow commandsLateral tongue bites notedNeuro exam unremarkable
LabsWBC 12, Na 132Otherwise wnl
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CaseAs you finish your exam the patient begins to
have a tonic-clonic seizure lasting 2 minutes
What do you do right now????
What are you thinking is causing the seizure???
Work up???
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EpilepsyWhat is it?
Tendency to have recurrent unprovoked seizures (2 or more)
How common is it?Common, about 2.5 million people in US
Common presentation complaintsNew seizure or increased frequency of seizures
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EpilepsyTypes of seizures
Localization related seizures Partial or focal
Start in one part of brain and may spread Simple or complex
Simple = normal awareness Complex = impairied awareness
May progress to generalized seizureGeneralized seizures
Involve both hemispheres of the brain at onset
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EpilepsyStatus Epilepticus
5 minutes of persistent seizures Or a series of recurrent seizures without a
return to full consciousness betweenDoes not have to be tonic-clonic seizure
Nonconvulsant states can be in status i.e. absence, complex partial seizures
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1st Seizure EvaluationSeizure causes
Head traumaBrain tumorCVAEncephalitis/MeningitisHypoglycemia/nonketotic hyperglycemia (HONK)Hyponatremia/HypernatremiaHypocalcemia, hypomagnesiumUremiaHyperthyroidismAnoxiaEtoh/benzo withdrawal
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1st Seizure EvaluationSeizure imitators
SyncopePsych d/oSleep d/o (narcolepsy)MigraineTIAs
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1st Seizure EvaluationWork up
Chemistry, thyroid functionProlactin (?)LP
If concerned about infectionNeuro imagingEEG
Often normal or nondiagnostic
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Acute Management of SeizuresGoals
Prevent aspiration/trauma
Terminate seizure
Prevent future seizures
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Acute Management of SeizuresWhat to do
Place patient in lateral decubitus position with head elevated at 3o degrees (lessen risk of aspiration)
Give oxygenAccucheck
If low 1 amp D50 If h/o EtOH use give thiamine first
Lorazepam .1 mg/kg total given in 2 mg increments May repeat every minute Can be given IV or IM, though better IV Can give rectally, but here we just don’t need to
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Acute Management of SeizuresCan load with IV phenytoin 15 mg/kg
IV infusion rate 50 mg/minWatch for hypotension and arrythmiasIf allergic, can load with phenobarbital,
valproate, levetiracetam
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Status EpilepticusIf seizures persist consider
IntubationLorazepam gtt
.1 mg/kg/hrCan use propofol gtt
Watch for complications of status epilepicusLactic acidosis, hyperreflexia, electrolyte
abnomalities, rhabdomyolysis and renal failure
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Antiepileptic DrugDecision typically made by NeurologistKnow common drugs and side effects
Medication Metabolism
Seizure Efficacy
Adverse Effects
Carbamazepine Hepatic Partial Bone marrow suppresion, hepatitis, low Na
Phenytoin Hepatic Partial Gum hyperplasia, rash, hirsutism, nystagmus
Valproate Hepatic Generalized Weight gain, alopecia, tremor, hepatitis, low platelets,
pancreatitis
Levetiracetam Renal Generalized Behavioral changes
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CaseWhat do you do right now????
Lorazepam IV +/- antiepletic
What are you thinking is causing the seizure???Electrolytes, thyroid function wnlCarbamazapine level subtherapeutic
Work up???Likely does not need imaging (h/o seizure d/o) or
LP