Also, it will introduce other various FHR monitoring methods designed for compensation of CTG, and the most recent advances in the field. Therefore, this paper will take a look at the screening validity of cardiotocogram (CTG), which is the most widely used for screening of compromised fetuses during labor. Thus, at the moment, a research based clarification is necessary about merits and problems with the FHR monitoring, and false positive and negative rates when it is used as a screening method for low risk pregnancy. Despite such problems, the FHR monitoring is continuously used for pregnant women during labor by most obstetricians, and such widespread use of the FHR monitoring is also observed in Korea. This is because it appeared to increase the rate of caesarian section and operative delivery without any substantial reduction of perinatal morbidity, and there is high intra- and inter-observer disagreement due to visual analysis of FHR tracings. However, the electronic fetal monitoring during labor has been consistently doubted with respect to its efficacy. Furthermore, researches about multiparameters of FHR variability will be ongoing.įetal heart rate (FHR) monitoring is one of the most important procedures for preventing perinatal morbidity and mortality in the field of obstetrics. Computerized equipment makes us to analyze beat-to-beat variability and short term heart rate patterns. To supplement cardiotocogram, new methods of computerized FHR analysis and electrocardiogram have been developed, and several clinical researches have been currently performed. Despite such limitations, the FHR monitoring is still one of the most important obstetric procedures in clinical practice, and the cardiotocogram is the most-used equipment. Also it is now clear that the FHR monitoring had high intra- and interobserver disagreements and increased the rate of cesarean delivery. However, several randomized controlled trials have failed to prove that electronic FHR monitoring had any benefit of reducing the perinatal mortality and morbidity. Since the electronic FHR monitoring was introduced 40 years ago, it has been expected to be an innovative screening test to detect fetuses who are becoming hypoxic and who may benefit from cesarean delivery or operative vaginal delivery. The monitoring of fetal heart rate (FHR) status is an important method to check well-being of the baby during labor.
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