Nieminen K, Westerèn-Punnonen S, Kokki H, Yppärilä H, Hyvärinen A, Partanen J
Department of Anaesthesiology and Intensive Care, Kuopio University Hospital, PO Box 1777, FIN-70211 Kuopio, Finland.
Br J Anaesth. 2002 Dec;89(6):853-6. doi: 10.1093/bja/aef290.
Sevoflurane is a methyl ether anaesthetic commonly used for induction and maintenance of general anaesthesia in children. Sevoflurane is a non-irritant and acts quickly so induction is usually calm. However, inhalation induction with high concentrations of sevoflurane can cause convulsion-like movements and seizure-like changes in the electroencephalogram (EEG). Little is known about the EEG during maintenance of anaesthesia with sevoflurane, so we planned a prospective trial of sevoflurane maintenance after i.v. induction with benzodiazepine and barbiturate, which is another common induction technique in children.
EEG recordings were made before premedication with midazolam (0.1 mg kg(-1) i.v.), during induction of anaesthesia with thiopental (5 mg kg(-1)), and during maintenance with sevoflurane (2% end-tidal concentration in air/oxygen without nitrous oxide) in 30 generally healthy, 3- to 8-year-old children having adenoids removed. Noise-free EEG data of good quality were successfully recorded from all 30 children.
Two independent neurophysiologists did not detect epileptiform discharges in any of the recordings.
Premedication with midazolam, i.v. induction with thiopental and maintenance of anaesthesia with 2% sevoflurane in air does not cause epileptiform EEG patterns in children.
七氟醚是一种甲基醚类麻醉剂,常用于小儿全身麻醉的诱导和维持。七氟醚无刺激性且起效迅速,因此诱导过程通常较为平稳。然而,高浓度吸入七氟醚诱导可导致类似惊厥的动作以及脑电图(EEG)出现类似癫痫发作的变化。关于七氟醚维持麻醉期间的脑电图情况知之甚少,所以我们计划进行一项前瞻性试验,观察在静脉注射苯二氮䓬类药物和巴比妥类药物诱导后使用七氟醚维持麻醉的情况,这是小儿另一种常见的诱导技术。
对30名3至8岁、一般健康且需行腺样体切除术的儿童,在静脉注射咪达唑仑(0.1mg/kg)进行术前用药前、硫喷妥钠(5mg/kg)诱导麻醉期间以及七氟醚维持麻醉期间(呼气末浓度为2%,空气/氧气混合,无氧化亚氮)进行脑电图记录。成功从所有30名儿童中记录到了质量良好的无噪声脑电图数据。
两名独立的神经生理学家在任何记录中均未检测到癫痫样放电。
咪达唑仑术前用药、硫喷妥钠静脉诱导以及在空气中使用2%七氟醚维持麻醉不会在儿童中引起癫痫样脑电图模式。