%0 Journal Article
%T Umbilical artery blood flows among pregnancies with single umbilical artery: a prospective case-control study.
%A Baron J
%A Weintraub AY
%A Sciaky Y
%A Mastrolia SA
%A Speigel E
%A Hershkovitz R
%J J Matern Fetal Neonatal Med
%V 28
%N 15
%D 2015
%M 25262995
%F 2.323
%R 10.3109/14767058.2014.968845
%X <B>OBJECTIVE: </B>To evaluate peak systolic velocity (PSV) in the umbilical artery (UA) among patients with single umbilical artery (SUA) as compared with patients with three vessel cords.<BR><B>METHODS: </B>A prospective case-control study was performed. UA blood flow velocimetry was obtained from fetuses with SUA and from a control group with three vessel cord. PSV and pulsatility index (PI) were measured. Patients' characteristics were compared for statistical differences and a linear regression model was constructed for the different groups.<BR><B>RESULTS: </B>UA Doppler velocimetry measurements were obtained from 29 patients with SUA and from 29 controls matched for gestational age. The differences between UA PI with and without SUA were significant (F = 3.471; p = 0.0379) showing a lower PI in the SUA group. However, no significant statistical difference was found in PSV between these two groups (F = 0.149; p = 0.86).<BR><B>CONCLUSIONS: </B>While the impedance in the UA of patients with a SUA was lower compared with patients with a normal umbilical cord, the PSV did not differ.