Department of ECE, College of Engineering Guindy Anna University, Chennai, India.
J Med Syst. 2020 Feb 10;44(3):66. doi: 10.1007/s10916-020-1523-y.
Electrohysterogram (EHG) signal is the signal related to action potentials propagating through smooth muscle cells of the uterus (myometrium) to the abdomen of pregnant women which is also known as uterine contraction signal. Cardiotocography (CTG) is the most common method used for monitoring fetal heart rate (FHR) and uterine contractions during pregnancy and labor. This method detects mechanical activity of fetal heart and uterus, however, it provides low accuracy and sensibility and hence more accurate methods are required. The abdominal electrode method of FECG monitoring and Electrohysterography (EHG) are alternative noninvasive method to monitor the FHR and uterine contractions during pregnancy which provides better results compared to CTG. Each information such as the frequency of uterine contractions, length of the contraction and contraction power of uterus, indicates the condition of the uterus which will help the obstetricians to identify the progress of labor. All these above mentioned parameters can be identified from the EHG signal acquired non-invasively by placing the electrodes on the abdomen of the pregnant women. In this work the acquisition of EHG signal as well as analysis of EHG signal in both antepartum condition and labor condition have been carried out and parameters such as number of contractions, contraction duration, amplitude, power of contraction are computed and the quantitative analysis of EHG signals in both above mentioned conditions are performed and it is compared with the simultaneously recorded uterine contraction signal parameters from Cardiotocography (CTG).
电子宫图（EHG）信号是与通过平滑肌细胞传播到孕妇腹部的动作电位相关的信号，也称为子宫收缩信号。胎心监护（CTG）是监测妊娠和分娩期间胎儿心率（FHR）和子宫收缩的最常用方法。该方法检测胎儿心脏和子宫的机械活动，但是，它提供的准确性和灵敏度较低，因此需要更准确的方法。FECG 监测的腹部电极方法和 Electrohysterography（EHG）是替代的非侵入性方法，可在妊娠期间监测 FHR 和子宫收缩，与 CTG 相比，提供了更好的结果。每个信息，如子宫收缩的频率、收缩的长度和收缩的力量，都表明了子宫的状况，这将有助于产科医生识别分娩的进展。所有这些参数都可以通过在孕妇腹部放置电极从非侵入性获得的 EHG 信号中识别出来。在这项工作中，已经进行了 EHG 信号的采集以及产前和分娩条件下的 EHG 信号分析，并计算了收缩次数、收缩持续时间、振幅、收缩功率等参数，并对上述两种条件下的 EHG 信号进行了定量分析，并与同时记录的胎心监护（CTG）的子宫收缩信号参数进行了比较。
