Ductus venosus blood flow velocity and single umbilical artery

Authors: Raio L.¹; Ghezzi F.²; Di Naro E.³; Cromi A.²; Buttarelli M.²; Sonnenschein M.¹; Dürig P.¹

Source: Ultrasound in Obstetrics and Gynecology, Volume 22, Number 3, September 2003 , pp. 252-256(5)

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Abstract:

Objectives

Sonographic Doppler evaluation of the fetal ductus venosus has been proved to be useful in the evaluation of fetal cardiac function. The aim of this study was to investigate the ductus venosus blood flow profile in fetuses with single umbilical artery and to correlate it with the umbilical cord morphology.

Methods

Fetuses at >20 weeks' gestation with single umbilical artery who were otherwise healthy were consecutively enrolled into the study. The sonographic examination included evaluation of the following Doppler parameters: umbilical artery resistance index, maximum blood flow velocity of the ductus venosus during ventricular systole (S-peak) and atrial contraction (A-wave), ductus venosus time-averaged maximum velocity (TAMXV), and pulsatility index for veins (PIV). The cross-sectional area of the umbilical cord and its vessels were measured in all cases. The Doppler and morphometric values obtained were plotted on reference ranges.

Results

A total of 88 fetuses with single umbilical artery were scanned during the study period. Of these 52 met the inclusion criteria. The S-peak velocity, A-wave velocity, and TAMXV were below the 5^th centile for gestational age in 57.7%, 59.6%, and 57.7% of cases, respectively. The PIV was within the normal range in 80.1% of cases. The umbilical vein cross-sectional area of fetuses with single umbilical artery was above the 95^th centile for gestational age in 34.6% cases.

Conclusions

The ductus venosus blood flow pattern is different in fetuses with single umbilical artery from that in those with a three-vessel cord. This difference may be caused in part by the particular morphology of umbilical cords with a single artery. Copyright © 2003 ISUOG. Published by John Wiley & Sons, Ltd.

Keywords: Doppler; ductus venosus; single umbilical artery; umbilical vein

Document Type: Research article

DOI: http://dx.doi.org/10.1002/uog.210

Affiliations: 1: Department of Obstetrics and Gynecology, University of Berne, Switzerland 2: Department of Obstetrics and Gynecology, University of Insubria—Del Ponte Hospital, Varese, Italy 3: Department of Obstetrics and Gynecology, University of Bari, Bari, Italy

Publication date: 2003-09-01

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Ductus venosus blood flow velocity and single umbilical artery

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