Mansour S, Devedeux D, Germain G, Marque C, Duchêne J
URA CNRS 858, Université de Technologie de Compiègne, Compiègne, France.
Med Biol Eng Comput. 1996 Mar;34(2):115-21. doi: 10.1007/BF02520015.
The objective is to analyse internal and external recordings of uterine EMG in order to reveal common features and to assess the relationship between electrical activity and intra-uterine pressure modification. Three monkeys participated in the study, one as a reference and the others for data. EMGs are recorded simultaneously, internally by unipolar wire electrodes and externally by bipolar Ag/AgCl electrodes. Intra-uterine pressure is recorded as a mechanical index. Except for delay measurements, parameters are derived from spectral analysis and relationships between recordings are assessed by studying the coherence. Spectral analysis exhibits two basic activities in the analysed frequency band, and frequency limits are defined as relevant parameters for electrical activity description. Parameter values do not depend on the internal electrode location. Internal and external EMGs present a similar spectral shape, despite differences in electrode configuration and tissue filtering. It is deduced that external uterine EMG is a good image of the genuine uterine electrical activity. To some extent, it can be related to an average cellular electrical activity.
目的是分析子宫肌电图的内部和外部记录，以揭示共同特征并评估电活动与子宫内压力变化之间的关系。三只猴子参与了该研究，一只作为对照，另外两只用于获取数据。肌电图通过单极线电极在内部同时记录，通过双极银/氯化银电极在外部同时记录。子宫内压力作为一个机械指标进行记录。除了延迟测量外，参数通过频谱分析得出，记录之间的关系通过研究相干性来评估。频谱分析在分析的频带中呈现出两种基本活动，频率极限被定义为描述电活动的相关参数。参数值不依赖于内部电极的位置。尽管电极配置和组织滤波存在差异，但内部和外部肌电图呈现出相似的频谱形状。由此推断，外部子宫肌电图是真实子宫电活动的良好反映。在一定程度上，它可以与平均细胞电活动相关。
