What is the recommended acute treatment, work‑up, and long‑term management for a child presenting with an active seizure?

Management of Seizures in Children

For an actively seizing child, immediately administer benzodiazepines (buccal midazolam, intranasal midazolam, rectal diazepam, or IV lorazepam) as first-line treatment, followed by a systematic approach to identify and treat the underlying cause while avoiding routine prophylactic anticonvulsant therapy in most cases. 1

Acute Management of Active Seizures

Immediate Treatment (First 5-10 minutes)

• Administer benzodiazepines immediately as standard pre-hospital and emergency treatment 1
• Preferred routes and agents:
  • Buccal midazolam (easiest to use, highly effective) 1
  • Intranasal midazolam 1
  • Rectal diazepam gel 1, 2
  • IV lorazepam or diazepam if access available 2

Established Status Epilepticus (30-90 minutes)

If seizures continue despite benzodiazepines, proceed to second-line agents 3:

• Phenytoin or fosphenytoin (IV) 3, 2
• Phenobarbital (IV) 3, 2
• Valproate (IV) 3, 2
• Levetiracetam (IV) 3, 2
• Lacosamide 3

Refractory Status Epilepticus (>90 minutes)

• Anesthetic agents required for seizures lasting more than 90 minutes 3

Diagnostic Work-Up

Clinical Assessment

Critical history elements to obtain 4, 5:

• Circumstances of seizure occurrence 4
• Specific clinical manifestations during the event 4
• For seizures with loss of consciousness, specifically ask about: cyanosis, hypersalivation, tongue biting, and postictal disorientation—these have specific diagnostic value 4
• Postictal symptoms and duration 4

Laboratory Testing

Selective, not routine 4, 5:

• Blood glucose measurement only if child is actively seizing or somnolent 5
• Serum electrolytes, magnesium, hepatic and renal function only when metabolic or toxic encephalopathy suspected 4, 2
• Toxicological screening only with circumstances suggesting toxic exposure 4
• Serum prolactin levels (10-20 minutes post-event) to differentiate true seizures from psychogenic nonepileptic seizures 4
• Serum anticonvulsant levels only in known epilepsy patients 5

Lumbar Puncture

• Mandatory when meningitis or encephalitis suspected 2
• Required for febrile seizures with clinical signs of meningitis 5
• Not routine for infants >6 months without signs of infection 4

Electroencephalography (EEG)

• Perform within 24 hours of seizure, particularly in children 4
• If waking EEG is normal, obtain sleep EEG 4
• Helps characterize focal versus generalized seizures and identify nonconvulsive status epilepticus 3

Neuroimaging

For focal seizures (highest priority):

• MRI is the primary imaging modality for newly diagnosed seizures 6
• MRI detects abnormalities in 55% of children with seizures versus only 18% with CT 6
• 28% of abnormal findings on MRI are not visible on initial CT 6
• MRI superior for detecting developmental abnormalities, gliosis, cortical malformations, and subtle lesions 6

For generalized seizures with normal neurologic exam:

• Neuroimaging yield is low (6% positive findings) 6
• Consider imaging based on clinical context rather than routinely 6

CT scan indications:

• Acute post-traumatic seizures when severe structural lesion or intracranial hemorrhage suspected 6
• Emergency situations where MRI not practically feasible 6
• CT identified 100% of acutely treatable lesions in mild trauma patients 6

Imaging NOT indicated:

• Benign rolandic seizures with classic EEG findings 6
• Benign occipital epilepsy with characteristic patterns 6

Long-Term Management Decisions

Simple Febrile Seizures (Age 6-60 months)

Definition: Brief (<15 minutes), generalized seizures occurring once in 24 hours in a febrile child without intracranial infection, metabolic disturbance, or history of afebrile seizures 6

Key management principle: Neither continuous nor intermittent anticonvulsant prophylaxis is recommended 6

Rationale:

• No long-term effects identified except high recurrence rate 6
• Risk of epilepsy extremely low (1% by age 7, same as general population) 6
• No evidence that prophylactic treatment reduces epilepsy risk—epilepsy results from genetic predisposition, not structural brain damage from febrile seizures 6
• No decline in IQ, academic performance, or neurocognitive function from recurrent simple febrile seizures 6
• Antipyretics ineffective in preventing recurrent febrile seizures 6
• Although phenobarbital, primidone, valproic acid, and diazepam reduce recurrence, their potential toxicities outweigh the minor risks of simple febrile seizures 6

Admission Criteria

Afebrile seizures 5:

• All children under 1 year of age 5
• Consider admission based on clinical context for older children 5

Febrile seizures 5:

• Children under 18 months old 5
• Complex seizures (>15 minutes, focal features, or >1 in 24 hours) 5
• After pretreatment with antibiotics 5

When to Consider Long-Term Anticonvulsant Therapy

May be considered after first seizure when 4:

• Abnormal EEG findings present 4
• Abnormal neuroimaging findings present 4
• After weighing social, emotional, and personal implications of seizure relapse 4

For acute symptomatic seizures:

• Treat the underlying cause 4, 2
• Symptomatic anticonvulsant therapy not justified unless seizure has characteristics of status epilepticus 4

Critical Pitfalls to Avoid

• Do not routinely prescribe prophylactic anticonvulsants for simple febrile seizures—the toxicity outweighs benefit 6
• Do not rely on CT alone for focal seizures—nearly one-third of significant abnormalities will be missed 6
• Do not perform routine laboratory testing—be selective based on clinical suspicion 4, 5
• Do not delay benzodiazepine administration in actively seizing children—early treatment reduces morbidity and brain damage 1
• Do not assume antipyretics prevent febrile seizure recurrence—they are ineffective 6