Abstract
The optimal duration of routine diagnostic electroencephalography (EEG) studies — diagnostic yield versus lab efficiency — has hardly been studied. The American Clinical Neurophysiology Society and International League Against Epilepsy recommend that EEGs last at least 20 to 30 minutes. However, many routine EEG studies are diagnostically negative. Repeated studies and sleep deprivation increase diagnostic sensitivity, but this adds costs and additional patient burden. Taking advantage of the Mayo Clinic's routine practice of performing 60-minute …
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