Yli-Hankala A
Tampere University of Technology, Finland.
Acta Anaesthesiol Scand. 1990 Oct;34(7):579-84. doi: 10.1111/j.1399-6576.1990.tb03149.x.
The effect of N2O on EEG during halothane and isoflurane anaesthesia was studied in 24 elective-surgery patients. The total EEG power and various power bands were analysed with fast Fourier transform power spectra. Anaesthesia was induced by mask. EEG analysis was performed from the data collected before induction and during steady-state halothane and isoflurane anaesthesia with and without N2O. In both halothane and isoflurane anaesthesia, N2O had a significant effect on EEG. Alpha- and beta-range EEG power and total power decreased during N2O in both groups. Delta- and theta-range power increased during N2O in the halothane group. The study shows that the effect of nitrous oxide should be taken into consideration when EEG is being studied or monitored during anaesthesia.
在24例择期手术患者中研究了笑气对氟烷和异氟烷麻醉期间脑电图（EEG）的影响。采用快速傅里叶变换功率谱分析EEG总功率和各功率频段。通过面罩诱导麻醉。根据诱导前以及在有和没有笑气的氟烷和异氟烷稳态麻醉期间收集的数据进行EEG分析。在氟烷和异氟烷麻醉中，笑气对EEG均有显著影响。两组在笑气吸入期间，α和β频段EEG功率及总功率均降低。氟烷组在笑气吸入期间δ和θ频段功率增加。该研究表明，在麻醉期间研究或监测EEG时应考虑笑气的影响。
