A hybrid intelligent system for the pre-processing of Fetal Heart rate signals in antenatal testing
The Non-Stress Test (NST) is a non-invasive test widely used in obstetrics to assess the fetal state by means of the analysis of Fetal Heart Rate (FHR) and Uterine Pressure (UP) signals. NST-EXPERT is an expert system designed for the diagnosis, therapy and prognosis of fetal state using the NST. NST-EXPERT uses the information extracted from the FHR/UP signals together with information regarding the maternal-fetal context. However, the acquisition of the parameters related to the signals was not automated yet. In achieving this task, the poor quality that the FHR signal presents very often, due to the presence of artifacts and maternal heart rate (MHR) coupling, needs to be faced. In this paper, a hybrid system capable of distinguish between artifacts, MHR and fetal signal to eliminate incorrect data that interfere in the analysis is described.
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- 1.-K. Hammacher. “The clinical significance of cardiotocography”. In P. Huntingford, M. Hunter and E. Saling, eds. Perinatal Medicine, Academic Press, pp 80–93, 1970.Google Scholar
- 2.-M.L. Cabaniss. “Fetal monitoring. Interpretation”. Ed. J.B. Lippincott Co, 1995.Google Scholar
- 3.-J.P. Lavery. “Nonstress fetal heart rate testing”. Clinical Obstetrics & Gynecology, Vol. 25, pp 689–705, 1982.Google Scholar
- 4.-L.D. Devoe. “The nonstress test”. In R.D. Eden, F.H. Boehm Eds. Assessment and Care of the fetus: Physiologic, clinical and medicolegal principles, Appleton and Lange, pp 365–384, 1990.Google Scholar
- 5.-F.K. Lotgering, H.C.S. Wallenburg and H.J.A. Schouten. “Inter-observer and intra-observer variation in the assessment of antepartum cardiotocograms”. American Journal of Obstetrics & Gynecology, Vol. 144, pp 701–705, 1982.Google Scholar
- 6.-A. Alonso-Betanzos, V. Moret-Bonillo, C. Hernández-Sande. “FOETOS: An expert system for fetal assessment”. IEEE Trans. on Biomed. Eng., Vol 38, pp 199–211, 1991.Google Scholar
- 7.-A. Alonso-Betanzos, B. Guijarro-Berdiñas, V. Moret-Bonillo, S. López-González. “The NST-EXPERT project: The need to evolve”. Artificial Intelligence in Medicine, Vol 7, No. 4, pp 297–314, 1995.Google Scholar
- 8.-G.S. Dawes, M. Moulden, C.W.G. Redman. “System 8000: Computerized antenatal FHR analysis”. J. Perinatal Medicine, Vol. 19, pp 47–51, 1991.Google Scholar
- 9.-K. Maeda. “Computerized analysis of cardiotocograms and fetal movements”. Lilford Eds., In Balliere's clinical obstetrics and gynaecology, Vol 4 pp 797–810 1990.Google Scholar
- 10.-B.R.L. Barlett, A. Murray and W. Dunlop. “Properties of fetal heartbeat intervals during labour”. J. Biomed. Eng. Vol. 13, pp 169–172, 1991.Google Scholar
- 11.-NeuroSolutions v.2.11. Neuro Dimension Inc., Gainesville, FL, USA, 1994.Google Scholar