OP13.15: Evaluation of clinical performance of obstetric residents: ultrasonographic estimation of fetal weight

Abstract

Oral poster abstracts flow (ml/min) reduced with UtA PI growth, even not significantly. UtA flow per EFW did show a significant inverse correlation to gestational age, dropping from 780.6 ml/min/kg at 15 weeks to 138.1 at 35 weeks (5.6 fold) (p < 0.001). Conclusions: 1) UtA flow (ml/min) and mean velocity significantly increased across gestation in normal pregnancies, while UtA diameter showed a slight not significant increment; 2) UtA flow volume (ml/min) did not show a significant reduction in relation to UA PI increase; UtA flow per EFW significantly reduced along gestation. OP13.12Predicting adverse neonatal outcome in fetuses with severe placental insufficiency: a pivotal role for birth weight Z-scores Objective: To identify significant predictors for adverse neonatal outcome in pregnancies compromised by severe placental insufficiency. Methods: Consecutive premature fetuses at between 25 and 32 weeks' with severe placental insufficiency were examined prospectively. Inclusion criteria were: (i) singletons (ii) normal anatomy; (iii) abnormal umbilical artery Doppler pulsatility index (PI); (iv) middle cerebral artery (MCA) PI < − 2SD; (v) last Doppler examination performed within 24 hours prior to delivery. We considered as independent potential predicting variables: absent or reversed end diastolic flow in umbilical artery, abnormal ductus venosus S/A ratio, absent or reversed flow during atrial contraction in the ductus venosus and birth weight Z-score. Outcome parameters were: neonatal mortality and severe neonatal morbidity. Results: Backward stepwise logistic regression analysis was used to determine the optimal model for the prediction of neonatal mortality and severe neonatal morbidity. In this analyses birth weigh Z-score index showed the strongest association OR = 1.87 [1.17-2.99] with all neonatal outcome. There was no mortality for the group with normal birth weight Z-score. Conclusion: Our study suggests that birth weight Z-score is the strongest predictor of adverse neonatal outcome in severe placental insufficiencies. Z-scores are independant of gestational age or sex covariates could be extended to estimated fetal weight and might help in making important decision in the management of compromised pregnancies. OP13.13 Customized centiles and perinatal morbidity