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[Methodologic problems and initial results of synchronous CTG computer-assisted registration of fetal movements by
W Gross1, K H Eichhorn, W Michels
1Klinik für Frauenheilkunde und Geburtshilfe, Friedrich-Schiller-Universität Jena.
Aim of the studies is the registration of latent criteria of hypoxia in fetuses with intrauterin growth retardation diagnosed by ultrasonography. Under standardized conditions, 19 pregnant women with hypotrophic and 20 with eutrophic fetuses were examined between weeks 36 and 40 of gestation. Concomitantly, fetal body and respiratory movements as well as the antenatal phonocardiotocogram were registered. The following apparatuses were used (fig. 1): ultrasound unit "sono Diagnost R" from Philips, FRG; six-channel recorder "6 NEK 401" from VEB Kombinat Messgerätewerk Zwönitz, GDR; lab-oriented computer "K 1520", VEB Kombinat Robotron Dresden, GDR; fetal monitor "MT 810" (with autocorrelation) from Toitu Co., LTD, Tokyo, Japan; There were close correlations between fetal body movements and accelerations in the cardiogram. The duration of the fetal body movements influenced the duration as well as the amplitude of the corresponding accelerations. A. comparison between the two groups examined reveals that these medium term changes in the heart rate were less marked in the hypotrophic fetuses than in the control group. The differences between the two groups were statistically significant (fig. 2, 3, 4, 5). Fetal respiratory movements influence the range of beat-to-beat-variability in the cardiogram. In the group of hypotrophic fetuses this range increased significantly by 1.4 bpm during one segments of respiratory movement. For the group of eutrophic fetuses the increase in the range of beat-to-beat-variability was 1.8 bpm. We did not find a significant difference between both groups.(ABSTRACT TRUNCATED AT 250 WORDS)
Aim of the studies is the registration of latent criteria of hypoxia in fetuses with intrauterin growth retardation diagnosed by ultrasonography. Under standardized conditions, 19 pregnant women with hypotrophic and 20 with eutrophic fetuses were examined between weeks 36 and 40 of gestation. Concomitantly, fetal body and respiratory movements as well as the antenatal phonocardiotocogram were registered. The following apparatuses were used (fig. 1): ultrasound unit "sono Diagnost R" from Philips, FRG; six-channel recorder "6 NEK 401" from VEB Kombinat Messgerätewerk Zwönitz, GDR; lab-oriented computer "K 1520", VEB Kombinat Robotron Dresden, GDR; fetal monitor "MT 810" (with autocorrelation) from Toitu Co., LTD, Tokyo, Japan; There were close correlations between fetal body movements and accelerations in the cardiogram. The duration of the fetal body movements influenced the duration as well as the amplitude of the corresponding accelerations. A. comparison between the two groups examined reveals that these medium term changes in the heart rate were less marked in the hypotrophic fetuses than in the control group. The differences between the two groups were statistically significant (fig. 2, 3, 4, 5). Fetal respiratory movements influence the range of beat-to-beat-variability in the cardiogram. In the group of hypotrophic fetuses this range increased significantly by 1.4 bpm during one segments of respiratory movement. For the group of eutrophic fetuses the increase in the range of beat-to-beat-variability was 1.8 bpm. We did not find a significant difference between both groups.(ABSTRACT TRUNCATED AT 250 WORDS)