Matonia Adam, Jezewski Janusz, Kupka Tomasz, Horoba Krzysztof, Wrobel Janusz, Gacek Adam
Department of Biomedical Informatics, Institute of Medical Technology and Equipment, Zabrze, Poland.
Med Biol Eng Comput. 2006 May;44(5):393-403. doi: 10.1007/s11517-006-0054-0. Epub 2006 Apr 12.
Bioelectrical fetal heart activity being recorded from maternal abdominal surface contains more information than mechanical heart activity measurement based on the Doppler ultrasound signals. However, it requires extraction of fetal electrocardiogram from abdominal signals where the maternal electrocardiogram is dominant. The simplest technique for maternal component suppression is a blanking procedure, which relies upon the replacement of maternal QRS complexes by isoline values. Although, in case of coincidence of fetal and maternal QRS complexes, it causes a loss of information on fetal heart activity. Its influence on determination of fetal heart rate and the variability analysis depends on the sensitivity of the heart-beat detector used. The sensitivity is defined as an ability to detect the incomplete fetal QRS complex. The aim of this work was to evaluate the influence of the maternal electrocardiogram suppression method used on the reliability of FHR signal being calculated.
从母体腹部表面记录的生物电胎儿心脏活动比基于多普勒超声信号的机械心脏活动测量包含更多信息。然而，这需要从以母体心电图为主导的腹部信号中提取胎儿心电图。抑制母体成分的最简单技术是消隐程序，该程序依靠用等值线值替换母体QRS复合波。尽管在胎儿和母体QRS复合波重合的情况下，这会导致胎儿心脏活动信息的丢失。其对胎儿心率测定和变异性分析的影响取决于所使用的心跳检测器的灵敏度。灵敏度定义为检测不完整胎儿QRS复合波的能力。这项工作的目的是评估所使用的母体心电图抑制方法对计算胎儿心率信号可靠性的影响。
