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Detection of umbilical venous constriction by Doppler flow measurement at midgestation
Author(s) -
Hasegawa J.,
Mimura T.,
Morimoto T.,
Matsuoka R.,
Ichizuka K.,
Sekizawa A.,
Okai T.
Publication year - 2010
Publication title -
ultrasound in obstetrics and gynecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.202
H-Index - 141
eISSN - 1469-0705
pISSN - 0960-7692
DOI - 10.1002/uog.7695
Subject(s) - umbilical cord , umbilical vein , medicine , constriction , fetus , lower limbs venous ultrasonography , vein , umbilical artery , anesthesia , pregnancy , anatomy , cardiology , surgery , biochemistry , chemistry , genetics , biology , in vitro
Abstract Objectives To investigate whether umbilical venous velocity and venous velocity pulsation are associated with umbilical vein diameter, umbilical ring diameter and umbilical cord coiling index at midgestation. Methods Two hundred and eighty pregnant women were enrolled in the study at between 18 and 24 weeks of gestation. The diameter of the umbilical cord and internal diameter of the umbilical vein in a free loop and at the ring, and the umbilical coiling index, were measured using ultrasonography. Umbilical venous velocities were measured by Doppler ultrasonography at the umbilical ring and a free loop of the cord. Results All variables were successfully measured in 92% of the patients. There were negative correlations between the diameters of the umbilical ring and of the umbilical vein at the ring and the venous velocity at the umbilical ring. The venous velocity at the umbilical ring was significantly higher and the umbilical ring diameter was significantly lower in fetuses with umbilical venous pulsation at the free loop. Significant correlations were observed between the venous velocity and amplitude of pulsation. Venous pulsations at the free loop were frequently observed in fetuses with a hypercoiled cord. Conclusion High venous velocity and increased venous pulsation at the umbilical ring may be associated with umbilical cord constriction. Copyright © 2010 ISUOG. Published by John Wiley & Sons, Ltd.