Nj. Outram et al., TECHNIQUES FOR OPTIMAL ENHANCEMENT AND FEATURE-EXTRACTION OF FETAL ELECTROCARDIOGRAM, IEE proceedings. Science, measurement and technology, 142(6), 1995, pp. 482-489
Detailed analysis of the fetal electrocardiogram (EGG) during labour c
ould provide valuable additional information to assist clinicians in r
educing incidents of unnecessary medical intervention without altering
current patient handling routines, but poor signal quality and diffic
ulty of processing the ECG without significant distortion have impeded
such analysis. The paper presents novel optimum curve fitting and dig
ital filtering techniques that make it possible to enhance the quality
of the ECG with minimal distortion and to measure, on a beat-by-beat
basis, almost any feature (e.g. time constants, amplitudes, areas, max
ima and minima) from the fetal ECG waveform accurately. This developme
nt removes a major obstacle in the use of fetal ECG and creates a basi
s for a thorough analysis of the changes in the key fetal ECG features
and for evaluating their clinical value in fetal monitoring.