P46.07: Perinatal outcome according to umbilical artery blood flow velocity waveform of term pregnancies with small for gestational age pregnancies

Abstract

outcome were significantly increased in infants with abnormal S/D ratio (P < 0.001). When logistic regression analysis was performed after adjusting for gestational age, the odds ratio for poor perinatal outcome was 3.7 in the group showing abnormal S/D ratio (95% confidence interval 1.42-9.54, P = 0.007). Conclusion: Umbilical artery Doppler velocimetry is shown as a significantly efficient method in predicting perinatal outcome in preterm neonates with small-for-gestational age, and it may be useful in managing preterm patients with small-for-gestational age fetuses. The results obtained in hypertensive patients: the incidence of fetal weight deficit at birth was 88.8% (25.9% the moderate form and 62.9% the severe form). The reliability of umbilical Doppler examination in the evaluation of fetal growth disorders was Se = 66.6%, Sp = 100%, PPV = 100%, NPV = 27.2%. A 15.5% error percent (8.6% false negative results and 6.9% false positive results) was obtained. P46.06 Evaluation of IUGR by umbilical Doppler examination Conclusions:In the presence of an ultrasound suspicion of IUGR, an abnormal umbilical RI value allows to confirm the alteration of fetal growth potential. A normal RI value in the context of IUGRE has a different significance depending on the presence or the absence of hypertension. P46.07Perinatal outcome according to umbilical artery blood flow velocity waveform of term pregnancies with small for gestational age pregnancies Ajou University School of Medicine, Republic of KoreaObjectives: To investigate whether umbilical artery blood flow velocity waveform is related to perinatal outcome of term pregnancies with small for gestational age. Methods: Total of 381 patients were at 37-41 weeks of gestational age who received antenatal umbilical artery Doppler blood flow and delivered singleton small-for-gestational age (SGA) infants. The ratio of peak-systolic to end-diastolic (S/D) blood flow velocities in the umbilical artery was measured in each patient. The patients were divided into a normal group (n = 307) with a S/D ratio equal to or less than 3.0, and an abnormal group with a S/D ratio of greater than 3.0 (n = 74). These groups were comparatively analyzed with respect to maternal characteristics and neonatal outcome. Results: There was no significant difference between the two groups with respect to mean maternal age, gestational age at the time of delivery, and Cesarean section rate due to fetal distress. There was significantly increased incidence of hypertensive disorders in pregnancy (12.3% vs. 25.0%, P = 0.005) and oligohydramnios (27.7% vs. 45.0%, P = 0.003) in the abnormal S/D ratio group. Significant difference was also observed between the two groups with respect to neonatal birthweight (2415.2 ± 258.9 vs. 2296.7 ± 325.0 g, P = 0.003), incidence of admission to neonatal intensive care unit (NICU) (27.0% vs. 51.3%, P < 0.001), and duration of NICU care (2.7 ± 5.9 vs. 5.7 ± 8.8 days, P = 0.005), but no difference was observed in terms of low Apgar score of less than 7 at 5 minutes (2.7%...