Clinical significance of uterine artery blood flow velocity waveforms during provoked uterine contractions in high-risk pregnancy

Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology
H LiP Olofsson

Abstract

To determine whether, in a group of high-risk pregnancies undergoing an oxytocin challenge test (OCT), uterine artery Doppler velocimetry will identify fetuses at risk of distress during the provoked contractions. Bilateral uterine artery Doppler velocimetry was performed simultaneously with electronic fetal heart rate (FHR) recordings in 67 high-risk pregnancies subjected to an OCT. Flow velocity waveforms (FVWs) were classified according to pulsatility index (PI), presence of diastolic notching and a novel classification of FVW shapes. The OCT was classified as negative (normal) or positive (late FHR decelerations). Only OCT-negative cases were allowed a trial of vaginal delivery. Non-parametric statistical methods were used to test for differences between the OCT groups. There was no difference in prevalence of high PI or diastolic notching in OCT-positive (n = 10) and OCT-negative (n = 57) cases at basal (resting) measurements or between uterine contractions in either uterine artery (P > or = 0.3). During contractions the PI could not be used for assessment due to the biphasic shape of the FVWs, but there was no difference in distribution of FVW classes between the groups in either the placental side (P > or = 0.3) or contr...Continue Reading

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Dec 23, 2003·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·H LiP Olofsson
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Citations

Aug 10, 2005·Fertility and Sterility·Murat ApiMurat Yayla
May 1, 2007·American Journal of Obstetrics and Gynecology·Julie T CrawfordJohn Buckmaster
Sep 25, 2014·Archives of Gynecology and Obstetrics·Joel BaronReli Hershkovitz
Aug 16, 2016·Clinics in Perinatology·Matthew A Rainaldi, Jeffrey M Perlman
Dec 14, 2004·Prenatal Diagnosis

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