Research Article
Kazuo Maeda
Abstract
Aim: To analyze the relation of fetal movement and heart rate. Method: Fetal movement and heart rate (FHR) was analysed by actodardiogram. Novel hypoxia index was calculated by the sum of FHR deceleration duration and the lowest FHR. Results: As FHR increasesd when the fetus moved, FHR was studied in the relation to fetal movements, e,g, benign sinusoidal FHR was evoked by periodic fetal respiratory movement. No FHR acceleration was found in fetal hiccupping due to no formation of fetal movement burst. Hypoxic loss of FHR acceleration and variability were caused by no response of damaged fetal brain to fetal movement. Discussion: The fetus should be cured from cerebral palsy by early delivery before the loss of variability, where the hypoxia index was 25 or more in the loss of variability followed by cerebral palsy, while normal variability and no cerebral palsy was preceded by 24 or less hypoxia index. Thus, the HI should be 24 or less to prevent cerebral palsy. Conclusion: FHR changes, which had not solved by CTG, was solved by the application of fetal movement. Novel hypoxia index is usefull for the prevention of cerebral palsy by the 24 or less of hypoxia index.