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  • Title: The Noninvasive Fetal Electrocardiogram During Labor: A Review of the Literature.
    Author: Lempersz C, Noben L, de Vries B, van Laar JOEH, Westerhuis MEMH, Oei SG.
    Journal: Obstet Gynecol Surv; 2020 Jun; 75(6):369-380. PubMed ID: 32603475.
    Abstract:
    IMPORTANCE: The introduction of the cardiotocogram (CTG) during labor has not been found to improve neonatal outcome. The search for a more reliable, less invasive, and patient-friendly technique is ongoing. The noninvasive fetal electrocardiogram (NI-fECG) has been proposed as one such alternative. OBJECTIVES: The aim of this study was to review the literature on the performance of NI-fECG for fetal monitoring during labor. Following the PRISMA guidelines, a systematic search in MEDLINE, EMBASE, and Cochrane Library was performed. Studies involving original research investigating the performance of NI-fECG during labor were included. Animal studies and articles in languages other than English, Dutch, or German were excluded. The QUADAS-2 checklist was used for quality assessment. A descriptive analysis of the results is provided. RESULTS: Eight articles were included. Pooled analysis of the results of the separate studies was not possible due to heterogeneity. All studies demonstrate that it is possible to apply NI-fECG during labor. Compared with Doppler ultrasound, NI-fECG performs equal or better in most studies. CONCLUSIONS AND RELEVANCE: NI-fECG for fetal monitoring is a promising noninvasive and patient-friendly technique that provides accurate information. Future studies should focus on signal quality throughout labor, with the aim to further optimize technical development of NI-fECG.
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