Clinical scenario:
A 5-year-old previously healthy boy is brought to the emergency department with generalized tonic-clonic seizures that have continued for 40 minutes. Initial stabilization has been completed, blood glucose is normal, and he has received two appropriate doses of intravenous lorazepam followed by a loading dose of intravenous fosphenytoin. Despite these interventions, he continues to have generalized convulsive seizures. He is receiving high-flow oxygen, and continuous cardiorespiratory monitoring is in place.
What is the most appropriate next step in management?
A. Continuous midazolam infusion
B. Intravenous phenobarbital
C. Repeat intravenous fosphenytoin
D. Repeat intravenous lorazepam
E. Urgent lumbar puncture
Correct Answer: A. Continuous midazolam infusion
Explanation: Refractory Status Epilepticus
This child has refractory convulsive status epilepticus (RSE), defined as persistent seizure activity despite adequate treatment with a benzodiazepine followed by an appropriate second-line antiseizure medication.
Failure of these treatments requires urgent escalation to specialist intensive care. The immediate priorities are airway and cardiorespiratory stabilization, seizure termination, and identification and treatment of the underlying cause.
Continuous intravenous midazolam infusion is a commonly used anesthetic treatment for pediatric refractory status epilepticus. Management should occur in a pediatric intensive care unit (PICU), with:
Airway and respiratory support: Prepare for intubation and mechanical ventilation because anesthetic doses can cause respiratory depression and hypotension.
Continuous anesthetic therapy: Initiate and titrate midazolam according to the institutional refractory status epilepticus protocol.
Continuous EEG monitoring: Use EEG where available to assess electrographic seizure control, particularly when clinical movements cease but consciousness does not recover.
Ongoing etiological investigation: Evaluate and treat relevant causes, including CNS infection, metabolic disturbances, toxic exposure, and structural brain pathology.
Midazolam is a standard option, although other anesthetic agents may be selected according to the child’s clinical condition, response to treatment, and local PICU protocol.
Why the other options are incorrect
A. Continuous midazolam infusion — Correct
Following failure of adequate benzodiazepine and second-line antiseizure therapy, continuous anesthetic treatment is indicated. Midazolam is widely used in children with refractory convulsive status epilepticus and requires intensive cardiorespiratory monitoring.
B. Intravenous phenobarbital
Phenobarbital has established antiseizure activity and may be used in selected treatment pathways, including as an alternative second-line agent or in specific refractory cases. However, if adequate first- and second-line treatment has already failed, the usual next step is escalation to PICU-based refractory seizure management rather than simply repeating an already completed treatment step.
C. Repeat intravenous fosphenytoin
Repeating a full loading dose after an adequate dose has already been administered is not routine management. Additional treatment should be guided by the previous dose, clinical response, drug exposure where relevant, and specialist advice.
D. Repeat intravenous lorazepam
Repeated benzodiazepine doses increase the risk of respiratory depression. If seizures persist after two appropriate benzodiazepine doses, including doses administered before hospital arrival, treatment should generally progress to second-line therapy rather than continued benzodiazepine repetition.
E. Urgent lumbar puncture
Lumbar puncture does not terminate the seizure and must not take priority over seizure control and stabilization. Investigation for CNS infection may be necessary once the child is sufficiently stable and the procedure is considered safe.
Learning Point
Refractory convulsive status epilepticus is generally defined by ongoing seizures despite:
Adequate benzodiazepine treatment; and
An appropriate second-line antiseizure medication.
The next step is urgent specialist escalation, usually to the PICU, for airway and cardiorespiratory support, continuous anesthetic therapy such as midazolam, and EEG monitoring where available.
Examination pearl: Do not delay escalation by repeatedly administering medications that have already failed. Control ongoing seizures while supporting ventilation and treating the underlying cause.
Find another high yield board review MCQ on status epilepticus treatment.
External Resources
1. Canadian Paediatric Society — Emergency Management of the Paediatric Patient With Convulsive Status Epilepticus — pediatric guidance on refractory status epilepticus and PICU escalation.
2. Neurocritical Care Society — Emergency Neurological Life Support: Status Epilepticus Protocol — treatment escalation and continuous anesthetic therapy.
References
McKenzie KC, Hahn CD, Friedman JN. Emergency management of the paediatric patient with convulsive status epilepticus. Paediatr Child Health. 2021;26(1):50–58. Available from: https://cps.ca/en/documents/position/emergency-management-of-the-paediatric-patient-with-convulsive-status-epilepticus
Johnson KT, AlZadjali AA, Al Nasseri DA, Cunningham J, Shoya K, Hahn CD, et al. Midazolam infusions for therapeutic management of pediatric refractory status epilepticus: a systematic review. Front Pediatr. 2025;13:1507325. doi:10.3389/fped.2025.1507325. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC12034653/
Glauser T, Shinnar S, Gloss D, Alldredge B, Arya R, Bainbridge J, et al. Evidence-based guideline: treatment of convulsive status epilepticus in children and adults: report of the Guideline Committee of the American Epilepsy Society. Epilepsy Curr. 2016;16(1):48–61. doi:10.5698/1535-7597-16.1.48. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC4749120/
