在sevoflurane全身麻醉期间EEG频率特征的变化:通过变化模式分解特征提取
Tomomi Yamada1, Yurie Obata2, Kazuki Sudo1
1Department of Anesthesiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajiicho, Kawaramachi-Hirokoji, Kamigyo, Kyoto, 602-8566, Japan.
Journal of clinical monitoring and computing
|July 3, 2023
概括
变化模式分解 (VMD) 在全身麻醉恢复期间有效分析电脑电图 (EEG) 信号. 这种方法揭示了内在模式函数 (IMFs) 的明显变化,有助于理解麻醉的出现.
科学领域:
- 神经科学是一个神经科学.
- 信号处理 信号处理
- 医疗信息学 医疗信息学
背景情况:
- 全身麻醉涉及大脑活动的复杂变化,通常使用电脑电图 (EEG) 进行监测.
- 变化模式分解 (VMD) 是一种信号处理技术,用于从时间序列数据中提取内在模式函数 (IMF).
- 在麻醉期间分析EEG可以提供关于麻醉状态的深度和出现的见解.
研究的目的:
- 应用变量模式分解 (VMD) 分析脑电图 (EEG) 信号在全身麻醉恢复期间.
- 开发和使用一个应用程序,EEG模式分解器,用于将EEG分解为IMF并可视化希尔伯特光谱图.
- 为了识别和描述特定IMF的变化,对应于从全身麻醉中出现的情况.
主要方法:
- 来自10名成人患者的EEG数据被记录下来,这些患者使用双光谱指数监视器接受了sevoflurane麻醉.
- 使用EEG模式分解器应用程序通过VMD将EEG信号分解为内在模式函数 (IMF).
- 在30分钟的复苏期内,分析了IMF的中心频率,与双谱指数变化相关联.
主要成果:
- 在康复期间,双光谱指数从47.1增加到97.4显著增加.
- 国际货币基金组织-1的中心频率从0.4赫兹显著下降到0.2赫兹.
- 观察到IMF-2到IMF-6的中心频率显著增加,这表明在麻醉后出现EEG组件的动态变化.
结论:
- 在全身麻醉期间,VMD是分析EEG信号的宝贵工具,可以提取特征频率变化.
- 确定的IMF变化为监测麻醉后出现的情况提供了可视化的标记.
- 这种方法为了解麻醉剂的神经生理效应提供了一种新的方法.
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