Document Detail

Uterine venous blood flow in normal and complicated pregnancies: a methodological study.
MedLine Citation:
PMID:  20127752     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To investigate the possibility of recording Doppler flow signals from the maternal uterine veins (UtVs) during pregnancy and to assess the relationship between UtV signals and other Doppler parameters as well as pregnancy outcomes. METHODS: Transabdominal Doppler ultrasound examination of the UtVs on both sides of the uterus was performed in 40 normal and 44 high-risk singleton pregnancies at 23-39 weeks' gestation. The UtV was identified using color Doppler imaging and the flow velocity signals of the UtV and uterine artery (UtA) were recorded. Morphological examination of the placenta was carried out in 45 of the pregnancies (14 uncomplicated and 31 high-risk pregnancies). RESULTS: Flow-velocity signals of the UtVs were recorded from at least one side of the uterus in all patients (success rate of 81 and 89% for the right and left UtV, respectively). Three types of flow-velocity pattern were identified: continuous non-pulsatile flow (Type I, n = 70), pulsatile flow with a notch touching the zero line (Type II, n = 6) and pulsatile flow with absent flow signals for part of the heart cycle (Type III, n = 8). The UtA pulsatility index was significantly higher in women with UtV Types II and III than in those with UtV Type I (P = 0.039). Similarly, UtV Types II and III were more often found in pregnancies with bilateral UtA notching (P = 0.013) and with UtA score 3-4 (P = 0.024) than in those with normal UtA. No statistically significant association was found between the UtV flow pattern and abnormal histopathological findings in the placenta, or between the UtV and umbilical artery findings. CONCLUSION: It is possible to record Doppler signals from the UtVs in the late second and third trimesters of pregnancy. Pulsatile flow-velocity patterns of the UtVs are associated with abnormal UtA Doppler findings.
A Thuring; R Laurini; K Marsál
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology     Volume:  35     ISSN:  1469-0705     ISO Abbreviation:  Ultrasound Obstet Gynecol     Publication Date:  2010 Apr 
Date Detail:
Created Date:  2010-04-07     Completed Date:  2010-09-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9108340     Medline TA:  Ultrasound Obstet Gynecol     Country:  England    
Other Details:
Languages:  eng     Pagination:  462-7     Citation Subset:  IM    
Copyright Information:
Copyright 2009 ISUOG. Published by John Wiley & Sons, Ltd.
Department of Obstetrics and Gynecology, Clinical Sciences Lund, Lund University, Sweden.
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MeSH Terms
Blood Flow Velocity / physiology*
Gestational Age
Infant, Newborn
Models, Theoretical
Placenta / blood supply,  pathology,  ultrasonography*
Pregnancy Outcome
Pregnancy Trimester, Third
Pregnancy, High-Risk
Pulsatile Flow / physiology*
Reference Values
Ultrasonography, Prenatal
Umbilical Arteries / pathology,  physiopathology,  ultrasonography*
Uterus / blood supply*,  pathology
Veins / physiopathology
Young Adult

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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