Electronic poster abstractsMethods: Time intervals of systolic (S) and diastolic (D) components of DV-FVW were measured in FGR fetuses. We also calculated the pulsatility index (DV-PI) and the ratio of S to D (S/D ratio). Longitudinal study of FGR fetuses was performed and each index was compared to the reference range. FGR was defined as the estimated fetal weight below -2.0 standard deviation of local standard with elevated umbilical artery pulsatility index more than 95 percentile of the normal reference range. Results: A total of 35 observations were performed (median, 6; range, 3-13) on 5 FGR fetuses. The median gestational age at inclusion and delivery were 25.1 (range, 22.3-27.7) weeks and 28.9 (range, 27.1-30.1) weeks. In FGR fetuses, S/D ratios became lower than the 5th percentile of the normal mean at the median of 20 days (range, 17-46) before delivery and showed almost linear deterioration throughout monitoring. DV-PI of FGR became higher than normal fetuses at the median of 20 days (range, 3-21) before delivery, which was almost the same as S/D ratio, however, S/D ratio seemed to show abnormal values several days earlier than DV-PI in some of the cases. Conclusions: Time intervals of systolic and diastolic phases and their ratio might add some insight to indices already established such as the DV-PI in evaluation of DV-FVW. Further study is needed for of these variables into clinical practice.
P13.06Elevated maternal red cell distribution width is associated with pregnancies complicated by intrauterine growth restriction
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