Effect of reducing the recording time of standard EEGs on the detection of EEG-abnormalities in the management of the epilepsies of childhood

Seizure : the Journal of the British Epilepsy Association
John AgbenuSusan Hargreaves

Abstract

The ILAE recommends baseline recordings of 30 min to detect abnormalities supporting a clinical diagnosis of epilepsy in children. A shorter recording time may be better tolerated by children and be more resource-efficient. Our aim was to determine how many abnormalities supporting a diagnosis of epilepsy would be missed by reducing the recording time of paediatric standard electroencephalograms (EEGs) from 20 to 15 min. We evaluated standard EEGs of 300 patients aged 2 months to 17 years referred consecutively with confirmed or suspected epilepsy. EEGs were recorded for 20 min on digital media. A digital copy of each EEG was truncated to give consecutive sequences of 10 min (sequence "A") and 5 min duration (sequences "B" and "C" respectively). A panel of EEG raters blinded to the children's' details other than age identified these sequences as "normal" or "abnormal" if they contained spike waves, discrete sharp waves or notched slow waves in the respective EEG period. EEGs of 297 children were analysed (three were omitted for technical reasons). 109 out of 297 EEGs (37%) had specific abnormalities supportive of a diagnosis of an epilepsy. 17 of these EEGs showed the abnormality in EEG sequences "B" or "C" and 7 (95% CI: 1.9-1...Continue Reading

References

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Citations

Jun 25, 2013·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Shaun S LodderMichel J A M van Putten
Jan 24, 2014·PloS One·Shaun S Lodder, Michel J A M van Putten
Mar 31, 2015·Journal of Child Neurology·Chandrabhaga MiskinDivya S Khurana
Jun 15, 2016·European Journal of Neurology : the Official Journal of the European Federation of Neurological Societies·J TheitlerR Gandelman-Marton
Jun 18, 2017·The Neurodiagnostic Journal·Rajesh P PoothrikovilMohammed Al Abri

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