P07.17: Transverse cerebral sinus Doppler velocimetry in the prediction of fetal acidemia: which is the best parameter?

Abstract

an increase of 190.8% (p < 0.05). Vmean of the renal artery increased significantly between the 20–24 week and the 37th–40th week (9.56 cm/s vs. 20.15 cm/s, p < 0.05). Area of the renal artery increased significantly between the 20–24 weeks and the 37–40 weeks (6.78 mm2 vs. 10.12 mm2, p < 0.05). No significant increase in RI or PI was observed. At the 20–24 weeks of gestation, renal artery waveforms consisted of 43.5% type I (only systolic waves) and 56.5% (systolic waves and some diastolic waves). Type III (systolic waves and persistent diastolic waves) was not recognized. At 25–28 weeks, they consisted 28.3% type I, 63.0% type II, and 8.7% type III. At the 29–32 weeks, type I decreased, and frequency of type II was 78.2%. At the 37–40 weeks, 76.1% type III, type II decreased to 23.9%, and type I was not recognized. Conclusions: Vmax was found to be the most effective index because it was easy to measure and the significant change of gestation progresses. The renal blood flow waveforms changed as advanced gestation in normal growth fetuses.