Hat die Dauer der Registrierzeit der funktionellen, arteriellen Sauerstoffsättigung des Feten einen Einfluss auf geburtshilfliche Parameter?

The intrapartum reflectance pulse oximetry is an additional procedure used during active labor and supplies the continuous measurement for the functional arterial oxygen saturation of the fetus (FspO2) in cases of abnormal fetal heart rate patterns. At the today's time the results of the clinical research are however very heterogeneous, so that priority and reliability of this new method are not clearly proved and this procedure could not be established in the clinical everyday life yet. A goal of the available work was to examine whether the duration of the registration time of the fetal pulse oximetry measurement has an influence on the parameters number of fetal blood samples, delivery mode, pH-value from the umbilical cord artery and transfer frequency to the neonatal intensive care unite, and whether an improvement in clinical application can be achieved. Into the retrospective analysis data from 48 female patients were included, in whom subpartal suspect or pathological fetal heart rate patterns, at least one fetal blood sample and a recording time of the fetal oxygen saturation monitoring of at least 60 minutes were present. Dependent on registration duration of the fetal oxygen saturation monitoring an organization of the data into two collectives took place. The limit value was specified with 80 per cent. After general evaluation and statistic analysis the following results could be reached: The mean FSpO2 monitoring time was 62,2% in collective A (N=27) and in collective B (N=21) 88,5%. Between the proportional recording time and the number of fetal blood samples no significant connection could be found (Chi2-Test: F=2,81). Also between registration duration and delivery mode was no statistic relevant connection (Chi2-Test: F=3,324 with p=0,190). Between registration duration and arterial cord pH-values no significant connection existed (t-test: tv=1,059; p=0,296). A signal production of more than 80% affected neither positively nor negatively the neonatale outcome in the available study. A connection between FSpO2-Werten < 30% and arterial cord pH-values < 7.20 could be likewise proven in none of the two collectives (Pearson coefficient of correlation r=-0,137; p=0,352). The delivery mode in connection with arterial cord pH-values < 7.20 showed a relative difference between the two collectives: during a signal production of more than 80% the rate of spontaneous deliveries was more highly, simultaneous in addition, the rate of arterial cord pH-values < 7.20. This difference was not significant however (Chi2-Test: F=3,32; p=0,190). Regarding the transfer frequency to the neonatal intensice care unite likewise no significant distribution difference between the two collectives could be found (Chi2-Test: F=0,003; p=0,959). Conclusion: the duration of the registration time of the fetal oxygen saturation monitoring does not have statistical significant influence on the parameters number of fetal blood samples, delivery mode, arterial cord pH-value and transfer frequency of the newborns.