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Epileptic EEG discharges during burst suppression
V Jäntti1, K Eriksson, K Hartikainen
1Department of Clinical Neurophysiology, Tampere University Hospital, Finland.
Insights
Barbiturate anesthesia for epilepsy can cause epileptiform discharges during EEG burst suppression. Distinguishing these discharges from true suppression is crucial for accurate anesthesia monitoring in children.
Area of Science:
- Pediatric Neurology
- Anesthesiology
- Clinical Neurophysiology
Background:
- Barbiturate anesthesia is utilized for status epilepticus and severe pediatric epilepsy.
- Electroencephalography (EEG) monitors anesthetic depth, with burst suppression as a key pattern.
- Intractable seizures in children often require barbiturate-induced anesthesia.
Observation:
- This case report details epileptiform discharges observed during EEG suppression in two children.
- One child exhibited focal, rhythmic negative spikes during suppression, responsive to photic stimulation.
- The second child presented generalized, high-amplitude spike-wave complexes, distinct from suppression bursts.
Findings:
- Epileptiform discharges can mimic or occur during EEG burst suppression under barbiturate anesthesia.
- Focal and generalized epileptiform discharges were observed in two pediatric patients.
- Photic stimulation could elicit bursts but did not alter the frequency of focal spike discharges post-burst.
Implications:
- Accurate differentiation between electrocerebral silence and EEG suppression is vital.
- Distinguishing epileptiform discharges from burst suppression is critical for maintaining targeted anesthetic levels.
- This distinction ensures appropriate management of pediatric patients undergoing barbiturate anesthesia for intractable seizures.
Abstract:
Barbiturate anaesthesia is used in the treatment of status epilepticus and severe epilepsy of children. EEG is then used as a measure of the depth of anaesthesia, burst suppression being an easily identified EEG pattern. In this case report we describe epileptiform discharges during EEG suppression in two children undergoing barbiturate anaesthesia for treatment of intractable seizures. One of them had focal, rhythmic discharges of negative spikes on the positive suppression level. Bursts were readily produced by visual stimuli with flashes of red light but this did not increase the frequency of focal spike discharges after bursts. The other patient had generalised, high amplitude spike-wave complexes, which were easy to distinguish from the bursts. We emphasise that it is important to make a distinction between electrocerebral silence, or isoelectric EEG as it was previously called, from EEG suppression. It is also important to distinguish epileptiform discharges from bursts, if the intention is to keep the anaesthesia at EEG burst suppression level.