Jossou Thierry R, Et-Tahir Aziz, Tahori Zakaria, El Ouadi Abdelmajid, Medenou Daton, Bybi Abdelmajid, Fagbemi Latif, Sbihi Mohamed, Piaggio Davide
Department of Biomedical Engineering, Ecole Polytechnique d'Abomey-Calavi, University of Abomey-Calavi, Abomey-Calavi, Benin.
Materials, Energy, Acoustics Team, Ecole Supérieure de Technologie de Salé, University Mohammed V, Rabat, Morocco.
Biophys Rev. 2021 May 9;13(3):405-415. doi: 10.1007/s12551-021-00805-w. eCollection 2021 Jun.
In low-income countries, pregnant women do not have easy access to health care, especially in rural and peri-urban areas. In this context, they can be surprised by the uterine contractions that precede childbirth and sometimes find themselves giving birth at home or on the way to the nearest health facility (located miles away from their home). In view of the development of an external uterine electrohysterogram acquisition system for labour prediction, a review of the literature on electrodes and their characteristics is necessary.
A comprehensive literature review was conducted to collate information on the use of electrodes in external EHG recording and their characteristics.
Wet electrodes based on Ag/AgCl redox chemistry are the most common type of electrodes for EHG, employed in different configurations on the pregnant woman's abdomen. All positioning configurations are around the vertical median axis if they are not placed directly on it. Positioning below the navel seems to be the most efficient. The number of source, reference, and ground electrodes used varies from one author to another, as does the distance between the electrodes.
Two well-positioned source electrodes on the vertical median axis, with ground electrode on the right side of the hip and reference one on the left side, are able to generate a good external EHG recording signal. The minimum allowed inter-electrode distance is approximately 17.5 to 25mm.
在低收入国家，孕妇难以获得医疗保健服务，尤其是在农村和城市周边地区。在这种情况下，她们可能会因分娩前的子宫收缩而感到意外，有时会在家中或在前往最近的医疗机构（离家数英里远）的途中分娩。鉴于开发用于分娩预测的外部子宫电图采集系统，有必要对电极及其特性的文献进行综述。
进行了全面的文献综述，以整理关于电极在外部子宫电图记录中的使用及其特性的信息。
基于Ag/AgCl氧化还原化学的湿电极是用于子宫电图的最常见电极类型，以不同配置应用于孕妇腹部。如果不直接放置在垂直中轴上，所有定位配置都围绕该轴。肚脐以下的定位似乎是最有效的。使用的源电极、参考电极和接地电极的数量因作者而异，电极之间的距离也是如此。
在垂直中轴上放置两个位置良好的源电极，接地电极位于臀部右侧，参考电极位于左侧，能够产生良好的外部子宫电图记录信号。电极之间允许的最小距离约为17.5至25毫米。
