• Recep Aksu, Sefer Kumandas, Aynur Akin, Cihangir Bicer, Hakan Gümüş, Gülen Güler, Hüseyin Per, Adnan Bayram, and Adem Boyaci.
• Department of Anaesthesiology, Erciyes University Medical Faculty, Kayseri, Turkey. raksu@erciyes.edu.tr
• Paediatr Anaesth. 2011 Apr 1;21(4):373-8.

BackgroundWhen electroencephalogram (EEG) activity is recorded for diagnostic purposes, the effects of sedative drugs on EEG activity should be minimal. This study compares the sedative efficacy and EEG effects of dexmedetomidine and midazolam.Subjects And MethodsEEG recordings of 60 pediatric subjects with a history of simple febrile convulsions were performed during physiologic sleep. All of these patients required sedation to obtain follow-up (control) EEGs. Subjects in Group D received 0.5 μg·kg(-1) of dexmedetomidine, and those in Group M received 0.1 mg·kg(-1) of midazolam. For rescue sedation, the same doses were repeated to maintain a Ramsey sedation score level of between 4 and 6.ResultsThe mean doses that were required for sedation were 0.76 μg·kg(-1) of dexmedetomidine and 0.38 mg·kg(-1) of midazolam. Diastolic blood pressure and HR were lower in Group D than in Group M (P < 0.05). Hypoxia was observed in 11 (36.7%) subjects in Group M and none in Group D; this was statistically significant (P < 0.001). Frontal and parieto-occipital (PO) EEG frequencies were similar during physiologic sleep and dexmedetomidine sedation. However, EEG frequencies in these areas (P < 0.001) and PO EEG amplitude (P = 0.030) were greater during midazolam sedation than during physiologic sleep.ConclusionsDexmedetomidine is a suitable agent to provide sedation for EEG recording in children. There is less change in EEG peak frequency and amplitude after dexmedetomidine than after midazolam sedation.© 2011 Blackwell Publishing Ltd.

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