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- Title
Intrapartum signal quality with external fetal heart rate monitoring: a two way trial of external Doppler CTG ultrasound and the abdominal fetal electrocardiogram.
- Authors
Reinhard, Joscha; Hayes-Gill, Barrie; Schiermeier, Sven; Hatzmann, Wolfgang; Herrmann, Eva; Heinrich, Tomas; Louwen, Frank
- Abstract
Objective: The objective of this study was to assess the fetal heart rate (FHR) signal quality of non-invasive abdominal fetal electrocardiogram (fECG) in comparison to the Doppler ultrasound cardiotocogram (CTG) during the first and second stage of labour. Study design: This was a prospective observational study of non-invasive fECG using five abdominally sited electrodes against the traditional Doppler ultrasound CTG probe on 144 patients. Data were analysed for signal quality before and after outlier removal. Results: Abdominal fECG signal quality was significantly better during the first stage of labour in comparison to Doppler CTG (median fECG reliability of 95.7 % vs. median 87.3 % for Doppler, p < 0.001), whereas during second stage of labour, equivalence was demonstrated ( p > 0.05). For the first and second stage of labour, fECG showed 106/135 (78.5 %) and 46/98 (46.9 %) women having fetal signal loss below 20 %, respectively. Similarly, Doppler ultrasound demonstrated 104/135 (77.0 %) and 51/98 (52.0 %) women having fetal signal loss below 20 % during first and second stage of labour, respectively. Conclusion: The non-invasive abdominal fECG presents an improved FHR signal quality during the first stage of labour and an equivalent signal quality during the second stage.
- Subjects
FETAL heart rate monitoring; ELECTROCARDIOGRAPHY; DOPPLER echocardiography; LABOR (Obstetrics); LONGITUDINAL method; DISEASES in women
- Publication
Archives of Gynecology & Obstetrics, 2012, Vol 286, Issue 5, p1103
- ISSN
0932-0067
- Publication type
Article
- DOI
10.1007/s00404-012-2413-4