Revista de Saúde e Informática Médica

Quantitative Analysis of Fetal Actocardiogram: Update

Abstract

Kazuo Maeda*

Abstract Aims: The actocardiogram (ACG), which recorded fetal heart rate (FHR) and movements, was quantitatively analyzed, due to its advantage to the FHR patterns diagnosis, to recognize the effect of fetal movement on FHR, to solve controversial FHR problems, to correctly evaluate fetal disorders, and to evaluate the loss of variability and acceleration. Methods: FHR changes were diagnosed by the FHR score, fetal movements were evaluated by 4 ACG parameters, fetal behavior and abnormal FHR were quantitatively determined, physiologic sinusoidal FHR was diagnosed by the ACG and FHR frequency analysis, the developing mechanism of FHR acceleration and variability were studied to diagnose the brain damage in the loss of FHR variability. 1.3 Results: The FHR score, neural network analysis and A/B ratio predicted short and long term outcomes in the 1st stage of labor or even in pregnancy. The ACG and frequency analysis differentiated physiologic sinusoidal from the true one, Contoversial problems in FHR were solved by the quantitative ACG analysis. The loss of FHR variability was the sign of fetal brain damage even in fetal non-hypoxic insults. Results: The FHR score, neural network analysis and A/B ratio predicted short and long term outcomes in the 1st stage of labor or even in pregnancy. The ACG and frequency analysis differentiated physiologic sinusoidal from the true one, Contoversial problems in FHR were solved by the quantitative ACG analysis. The loss of FHR variability was the sign of fetal brain damage even in fetal non-hypoxic insults. Conclusion: Quantitative analyses of FHR and fetal movements in ACG were indispensable in the fetal diagnosis even in general insults. Since cerebral palsy (CP) could develop in the loss of FHR variability, C-section is recommended to perform before the loss of FHR variability.