| Relation between utero-placental and feto-placental circulations: a longitudinal study. | |
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MedLine Citation:
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PMID: 20726828 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: To explore the relation between total utero-placental (TQ(uta)) and feto-placental (Q(uv)) blood flows and establish longitudinal reference ranges for the TQ(uta)/Q(uv) ratio and the mean uterine artery and umbilical artery pulsatility (UtaPI/UAPI) and resistance index (UtaRI/UARI) ratios. DESIGN: Prospective longitudinal observational study. SETTING: University hospital in Norway. POPULATION: Fifty-three low-risk pregnant women. METHODS: Uterine artery and umbilical vein blood flow was measured using Doppler ultrasonography at 4-weekly intervals from 22(+0) to 39(+6) weeks of gestation. MAIN OUTCOME MEASURES: Ratios between utero-placental and feto-placental volume blood flows and between indices of uterine and umbilical artery impedance. RESULTS: The TQ(uta)/Q(uv) ratio had a significant association with the gestational age (p < 0.00001) and decreased with advancing gestation during the second half of pregnancy. The mean UtaPI/UAPI (p = 0.094) and mean UtaRI/UARI (p = 0.323) ratios were not significantly associated with gestational age and remained relatively constant. There was no significant association between TQ(uta) and Q(uv) (p = 0.72), mean UtaPI and UAPI (p = 0.56), or mean UtaRI and UARI (p = 0.57). CONCLUSION: The gestational-age-related changes in the utero-placental and feto-placental circulations do not appear to be affected by each other under physiological conditions. We have established longitudinal reference ranges for the utero-placental and feto-placental blood flow and impedance ratios during the second half of pregnancy. |
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Authors:
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Kari Flo; Tom Wilsgaard; Ganesh 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: Acta obstetricia et gynecologica Scandinavica Volume: 89 ISSN: 1600-0412 ISO Abbreviation: Acta Obstet Gynecol Scand Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-09-17 Completed Date: 2010-09-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0370343 Medline TA: Acta Obstet Gynecol Scand Country: England |
Other Details:
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Languages: eng Pagination: 1270-5 Citation Subset: IM |
Affiliation:
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Women's Health and Perinatology Research Group, Institute of Clinical Medicine, Faculty of Health Sciences, University of Tromsø, Tromsø, Norway. kari.flo@uit.no |
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Blood Flow Velocity Female Fetus / blood supply* Humans Placenta / blood supply*, ultrasonography Placental Circulation / physiology* Pregnancy Pregnancy Trimester, Second Prospective Studies Reference Values Ultrasonography, Doppler Umbilical Arteries / physiology*, ultrasonography Umbilical Veins / physiology*, ultrasonography Uterine Artery / physiology*, ultrasonography Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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