Multichannel automatic foetal movement monitoring and classification system
The purpose of this work was to develop a compact, noninvasive and objective tool for foetal movement monitoring and classification. Four tocodynamometers were used as movement transducers and their output signals processed by a minicomputer on which a microprocessor real time compatible algorithm was developed. The algorithm was based on time domain analysis where the parameters, such as averaging intervals and threshold levels were optimised in a trial and error procedure to minimise undetected foetal movements and false detections on a set of nine pregnant women. The detection score was 92·2 per cent when short foetal movements were ignored.
KeywordsFoetal movements Movement classification Real time classification Time domain classification Tocodynamometers
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- Inbar, G. F. (1979) Karhunen Loeve orthogonalization expansion for biological signal classification. XII International Conf. on MBE, Jerusalem.Google Scholar
- Inbar, G. F. andNoujaim, A. (1984) Surface EMG spectral characterization and its application to diagnostic classification.IEEE Trans.,BME-31, 9, 597–604.Google Scholar
- Markel, J. D. andGray, A. H. (1976)Linear prediction of speech. Springer Verlag.Google Scholar
- Ron, M. andPolishuk, W. Z. (1976) The response of the foetal heart rate to amniocentesis.Br. J. Obstet. Gynecol.,83, 768–770.Google Scholar
- Sadovsky, E. andPolishuk, W. Z. (1977) Foetal movements in utero: nature, assessment, prognostic value, timing of delivery.Obstet. and Gynecol.,50, 49–55.Google Scholar
- Timor-Tritsch, I. E., Dierker, L. J., Zador, I., Hertz, R. H. andRosen, M. G. (1977) Classification of human foetal movement.Am. J. Obstet. Gynecol.,126, (1), 70–77.Google Scholar
- Timor-Tritsch, I. E., Dierker, L. J., Hertz, R. H., Deagan, N. andRosen, M. G. (1978) Studies of antepartum behavioral states in the human foetus at term.Am. J. Obstet. Gynecol.,132, (5), 524–528.Google Scholar