研究单位：[1]Huazhong University of Science and Technology[2]Department of Anaesthesiology,Tongji Hospital of Tongji Medical College,Huazhong University of Science and Technology Wuhan,Hubei,China,430030
研究目的：
In order to investigate the effect of a combination effect of sevoflurane and nitrous oxide on cerebral electrical activity, the investigators determined the MAC of sevoflurane combined with nitrous oxide inducing isoelectric electroencephalogram (EEG) in 50% of the subjects (MACie) in middle aged subjects.
