Association between a low umbilical artery pulsatility index and fetal distress in labor in very prolonged pregnancies

European Journal of Obstetrics, Gynecology, and Reproductive Biology
P OlofssonKarel Marsál

Abstract

To investigate the association between fetal, umbilical and uterine circulatory changes and adverse perinatal findings in very prolonged pregnancies. 44 women proceeding to 43 completed weeks of gestation with the intention of a trial of vaginal delivery were studied prospectively with ultrasound Doppler velocimetry. An intensified fetal surveillance was routinely commenced at 42 weeks and only uncomplicated pregnancies were allowed to proceed. The endpoint perinatal measures were oligohydramnios, fetal meconium release, fetal distress in labor and birth asphyxia. Flow variables in different groups were compared with the Mann-Whitney U test, Student's unpaired t-test, Wilcoxon signed-rank matched-pairs test, Fisher's exact test and contingency table analysis, and a two-tailed P value <0.05 was considered statistically significant. The umbilical artery pulsatility index was significantly lower in cases of fetal meconium release (n=12) and fetal distress (n=7). The umbilical venous flow velocity was significantly lower in cases of meconium, and the fetal aortic volume flow significantly higher in cases of fetal distress. No significant flow changes were found in connection with oligohydramnios (n=5) and birth asphyxia (n=2). Uter...Continue Reading

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Citations

Jun 10, 2000·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·R HershkovitzC H Rodeck
Apr 3, 2004·Acta Obstetricia Et Gynecologica Scandinavica·Per OlofssonKarel Marsál
Mar 12, 2005·The Australian & New Zealand Journal of Obstetrics & Gynaecology·William W K ToKa-Ming Mok
Nov 13, 2007·Journal de gynécologie, obstétrique et biologie de la reproduction·G Beucher, M Dreyfus
Nov 11, 2005·Acta Paediatrica·Katarina LindströmMagnus Westgren

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