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Fetal ECG during labour: a presentation of a microprocessor system.

H Lilja·S Arulkumaran·K Lindecrantz·S S Ratnam·K G Rosén
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Abstract

Changes in the ST waveform of the fetal ECG have been detected in 47 term deliveries with vertex presentations using a specially developed microprocessor-based system for on-line recording of T wave amplitude. The T wave was quantified by the T/QRS ratio. The recording included one scalp electrode for exploration and a maternal skin electrode as reference. Signal quality allowed optimal ST waveform assessment in 89% of the cases. The degree of perinatal asphyxia was judged from cord artery acid-base status and the neonatal outcome. In completely normal fetuses at term the mean T/QRS ratio was 0.148 with a standard deviation of 0.048. With this basic information we can proceed in the investigation of the T/QRS ratio as a means for fetal surveillance.

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ElectrocardiographyElectrodesFemaleFetal HeartFetal MonitoringHumansLabor, ObstetricMicrocomputersPregnancySignal Processing, Computer-AssistedJournal ArticleResearch Support, Non-U.S. Gov't

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H Lilja, S Arulkumaran, K Lindecrantz, S S Ratnam, K G Rosén. 1988. Fetal ECG during labour: a presentation of a microprocessor system.. https://doi.org/10.1016/0141-5425(88)90066-0

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