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P05.21: Monitoring of fetuses with intrauterine growth restriction: an observational study for the evaluation of new predictive parameters

Results: There are significant differences in PI values in normal pregnancy and pregnancy complicated by intrauterine growth restriction with hypoxia, especially in M2 segment. The prognostic values of abnormal M2 PI in prediction of fetal hypoxia were: sensitivity and positive predictive value of birthweight below 10 centile, 60 and 89%, respectively; sensitivity and negative predictive value of admission to NICU, 78 and 85%, respectively; and sensitivity and negative predictive value of artificial ventilation, 89 and93%, respectively. There were found low sensitivity and positive predictive value of pH and BE in umbilical artery, with high specificity and negative predictive value, 82 and 85%, 82 and 95%, respectively. Specificity and negative predictive value of pH and BE in umbilical vein, also were high, 85 and 89%, 84 and 100%, respectively. Conclusions: PI of M2 segments of the MCA seems to be a good predictor of fetal hypoxia during the second half of pregnancy complicated by growth restriction.