| Longitudinal reference ranges for umbilical vein blood flow at a free loop of the umbilical cord. | |
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MedLine Citation:
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PMID: 20586043 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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OBJECTIVE: To establish longitudinal reference ranges for the umbilical vein (UV) diameter, velocities and volume blood flow (Q(uv)) at a free loop of the umbilical cord and estimate the UV spatial velocity profile at this site. METHODS: This was a prospective study of 53 low-risk pregnancies. The UV diameter and blood flow velocities were measured at 4-weekly intervals from 22 + 0 to 39 + 6 weeks of gestation (232 observations) using B-mode ultrasonography and pulsed-wave Doppler. Multilevel regression modeling was used to estimate the reference percentiles. RESULTS: The mean UV diameter, velocities and Q(uv) increased with advancing gestation, whereas the Q(uv) normalized for estimated fetal weight decreased. The UV spatial velocity profile coefficient was 0.62. CONCLUSION: We have established reference ranges for serial measurements of Q(uv) at a free loop of the umbilical cord during the second half of pregnancy. The spatial velocity profile of the UV is not completely parabolic at this site. |
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Authors:
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K Flo; T Wilsgaard; G Acharya |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology Volume: 36 ISSN: 1469-0705 ISO Abbreviation: Ultrasound Obstet Gynecol Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-10-28 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9108340 Medline TA: Ultrasound Obstet Gynecol Country: England |
Other Details:
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Languages: eng Pagination: 567-72 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 ISUOG. Published by John Wiley & Sons, Ltd. |
Affiliation:
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Institute of Clinical Medicine, Faculty of Health Sciences, University of Tromsø, Tromsø, Norway. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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