Funding sources: None
Relationship between the umbilical cord coiling index and the umbilical blood flow at 11–13 weeks of gestation
Article first published online: 27 MAY 2013
© 2013 John Wiley & Sons, Ltd.
Volume 33, Issue 8, pages 764–769, August 2013
How to Cite
Hasegawa, J., Nakamura, M., Hamada, S., Matsuoka, R., Ichizuka, K., Sekizawa, A. and Okai, T. (2013), Relationship between the umbilical cord coiling index and the umbilical blood flow at 11–13 weeks of gestation. Prenat. Diagn., 33: 764–769. doi: 10.1002/pd.4122
Conflicts of interest: None declared
- Issue published online: 2 AUG 2013
- Article first published online: 27 MAY 2013
- Accepted manuscript online: 1 APR 2013 07:51PM EST
- Manuscript Accepted: 26 MAR 2013
- Manuscript Revised: 25 MAR 2013
- Manuscript Received: 11 JAN 2013
The aim of this study was to clarify the effects of umbilical cord coiling on the umbilical blood flow at 11–13 weeks of gestation.
A cross-sectional study was conducted among consecutive pregnant females at 11–13 weeks of gestation. Transabdominal ultrasound examinations were performed to obtain the umbilical coiling index (CI), the maximum umbilical arterial peak velocity at the free loop, the venous velocities at the free loop and the umbilical ring, and the umbilical arterial and venous flow volumes. After every measurement was standardized according to the crown-rump length (CRL), correlations between the CI and these measurements were analyzed.
A total of 364 subjects were enrolled. The CI significantly decreased in association with advancing gestation. There were significant correlations between the CRLs and the umbilical arterial peak velocities, the venous velocities at the free loop and the umbilical ring, and the umbilical arterial and venous flow volumes. The z-scores of the umbilical arterial and venous velocimetries exhibited no significant correlations with the CI. The umbilical arterial and venous flow volumes were also not found to correlate with the CI.
The CI does not affect either the umbilical arterial or venous blood flow at 11–13 weeks of gestation. © 2013 John Wiley & Sons, Ltd.