Summary
Estimation of the instantaneous variability of the fetal heart rate (FHR) is affected by the autocorrelation techniques commonly used in Doppler ultrasound channel of today’s fetal monitors. Considerably decrease of short-term variability have been noted, which is quite surprising because the fetal monitors determine the fetal heart rate with quite satisfying accuracy in relation to the reference direct fetal electrocardiography. The aim of this work was to recognize a source of errors and to develop the method for correction of the indices describing the FHR variability for a given type of fetal monitor. The proposed correction relies upon removing of the constant error component, which has been assigned to an averaging nature of the autocorrelation function. Although the remaining random error component is still not too satisfactory considering the instantaneous values, a significant improvement of reliability of the fetal heart rate variability measurement was confirmed in case of a global one-hour trace assessment.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Dawes, G.S., Visser, G.H.A., Goodman, J.D.S., Redman, C.W.G.: Numerical analysis of the human fetal heart rate: The quality of ultrasound records. Am. J. Obstet. Gynecol. 141, 43–52 (1981)
De Haan, J., van Bemmel, J.H., Versteeg, B., et al.: Quantitative evaluation of fetal heart rate patterns I. Processing methods. Europ. J. Obstet. Gynecol. 3, 95–102 (1971)
Jezewski, J., Horoba, K., Wrobel, J., et al.: Monitoring of mechanical and electrical activity of fetal heart. Determination of the FHR. Arch. Perinat. Med. 8, 33–39 (2002)
Jezewski, J., Kupka, T., Horoba, K.: Extraction of Fetal Heart Rate Signal as Time Event Series from Evenly Sampled Data Acquired Using Doppler Ultrasound Technique. IEEE. Trans. Biomed. Eng. 55, 805–810 (2008)
Jezewski, J., Matonia, A., Kupka, T., Wrobel, J.: Fetal monitoring with online processing of electrocardiographic signals. IFMBE Proc 3rd Eur. Med. Biol. Eng. EMBEC 11, 1–5 (2005)
Jezewski, J., Wrobel, J., Horoba, K., et al.: Centralised fetal monitoring system with hardware-based data flow control. In: 3rd IET Int. Conf. MEDSIP 2006, pp. 1–4 (2006)
Jezewski, J., Wrobel, J., Horoba, K.: Comparison of Doppler ultrasound and direct electrocardiography acquisition techniques for quantification of Fetal Heart Rate variability. IEEE. Trans. Biomed. Eng. 53, 855–864 (2006)
Kubo, T., Inaba, J., Shigemitsu, S., Akatsuka, T.: Fetal heart variability indices and the accuracy of variability measurements. Am. J. Perinat. 4, 179–186 (1987)
Kupka, T., Jezewski, J., Matonia, A., et al.: Timing events in Doppler ultrasound signal of fetal heart activity. In: Proc 26th IEEE EMBS Int. Conf. 2004, pp. 337–340 (2004)
Lawson, G.W., Belcher, R., Dawes, G.S., Redman, C.W.G.: A comparison of ultrasound (with autocorrelation) and direct electrocardiogram fetal heart rate detector systems. Am. J. Obstet. Gynecol. 147, 721–722 (1983)
Shakespeare, S.A., Crowe, J.A., Hayes-Gill, B.R., et al.: The information content of Doppler ultrasound signals from the fetal heart. Med. Biol. Eng. Comput. 39, 619–626 (2001)
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 2008 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Wrobel, J., Jezewski, J., Horoba, K. (2008). Coping with Limitation of Bedside Measurement Instrumentation for Reliable Assessment of Fetal Heart Rate Variability. In: Pietka, E., Kawa, J. (eds) Information Technologies in Biomedicine. Advances in Soft Computing, vol 47. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-68168-7_35
Download citation
DOI: https://doi.org/10.1007/978-3-540-68168-7_35
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-68167-0
Online ISBN: 978-3-540-68168-7
eBook Packages: EngineeringEngineering (R0)