Status epilepticus

Status epilepticus


INTRODUCTION:

  • Staus Epilepticus refer to continuous seizures or reparative, discrete seizures with impaired consiousness in the  interictal period
  • Seizure activity not  resolving spontaneously , or recurrent seizures with no recovery of conciousness in between
ETIOLOGY:
  • Acute symptomatic,  remote symptomatic  & idiopathic causes
  • Anticonvulsant withdrawal or non-compliance -GCSE

Common etiology:

  • H/O previous CNS insult
    • Infection- meningitis & encephalitis
    • Metabolic derrangement
    • Hypoglycemia , Hyponatremia
    • Neoplasia or Tumor
    • Drug toxicity
    • Acute stroke
    • Alcohol intake
    • Anoxia/Hypoxia
    • Infection with fever(meningitis) is the most common cause in children

CLINICAL FEATURES:

  • Prolonged rigidity &/or clonic movements with loss of awareness
  • As seizures activity becomes prolonged, movements may become more subtle- Mild clonic movements  of only the fingers & fine rapid movements of eyes 
  • There may be proxysmal episodes of tachycardia, hypertension & pupillary dilation
  • Cynosis, pyrexia, acidosis & sweating may occur 
COMPLICATIONS:
  • Aspiration
  • Hypotension
  • Cardiac Arrythmias
  • Renal Failure
  • Hepatic Failure
  • Epilepsy
  • Encephalopathy
  • Focal neurological deficit 

MANAGEMENT:

OPIOIDS

  • Morphine acts by agonistic activity on μ, K and δ receptors.
  • The drug of choice for status epilepticus is Lorazepam
  • In status epilepticus, drug of choice is IV diazepam
  • Receptor for opioid system – G protein-coupled orphanin opioid-receptor-like subtype1 (ORL1).
  • A child in status epilepticus should be given Clonazepam, Phosphenytoin & Diazepam
  • Its endogenous ligands are nociceptin /orphanin FQ (N/OFQ System).
  • Nociceptin: similar to dynorphin but acts only at the ORL1 receptor. 
Opioids Natural opioids Morphine, Codeine
Semisynthetic opioids Diacetyl morphine (Heroin), Pholcodeine
Synthetic opioid Pethidine(Meperidine), Fentanyl, Methadone, Dextropropoxyphene, Tramadol
Complex

Action opioid & antagonists

Agonist- antagonist Nalorphine, Pentazocine, Dezocine, Meptazinol, Butorphanol
Partial/weak μ

agonist + K antagonist

Buprenorphine
Pure antagonists Naloxone, Naltrexone, Nalmefene

Exam Important

  • The initial drug of choice for status epilepticus is Lorazepam
  • Causes of status epilepticus in a child Hyponatremia
  • Status epilepticus is the complication (s) of meningitis in a child
  • A child in status epilepticus should be given Clonazepam, Phosphenytoin & Diazepam
  • In status epilepticus, drug of choice is IV diazepam
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