Document Detail

Influence of nuchal cord on ductus venosus assessment at 11 to 13 + 6 weeks' gestation.
MedLine Citation:
PMID:  20104536     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: To assess the influence of the presence of nuchal cord (NC) on the evaluation of the fetal ductus venosus flow velocity waveform (DV-FVW). METHODS: This prospective study included 1174 normal non-selected singleton pregnancies between 11 and 13 + 6 weeks' gestation. We recorded the presence or absence of NC around the fetal neck, and assessed its relationship with the qualitative assessment and quantitative measurement of the DV-FVW. RESULTS: We observed NC around the fetal neck in 6.73% of cases and detected reversed flow of the a-wave of the DV-FVW in 2.98% of cases. In the group without NC, 21 of 1095 had reversed flow in the DV-FVW (1.9%; 95% CI, 1.28-3.02), whereas in the group with NC, 14 of 79 had reversed flow in the DV-FVW (17.7%; 95% CI, 16.67-40.35). We found a lower pulsatility index in fetuses without NC in comparison to those with NC (P < 0.001). We also found an association between the presence of NC and an increased occurrence of absent and reversed a-wave of the flow velocity waveforms (P < 0.001). On multivariate logistic regression analysis, a much higher occurrence of reversed DV-FVW a-wave was detected in fetuses with NC and smaller crown-rump length, and a much higher occurrence of absent DV-FVW a-wave was found in fetuses with NC and a higher maternal body mass index. CONCLUSIONS: The presence of NC modifies the sonographic findings in the qualitative and quantitative evaluation of the DV-FVW.
W Plasencia; P Lopez; M Esparza; R Garcia; M A Barber; J A Garcia
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Publication Detail:
Type:  Journal Article    
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 Mar 
Date Detail:
Created Date:  2010-03-10     Completed Date:  2010-09-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9108340     Medline TA:  Ultrasound Obstet Gynecol     Country:  England    
Other Details:
Languages:  eng     Pagination:  263-6     Citation Subset:  IM    
Copyright Information:
(c) 2010 ISUOG. Published by John Wiley & Sons, Ltd.
Fetal Medicine Unit, Department of Obstetrics and Gynecology, Hospital Universitario Materno-Infantil de Canarias, Las Palmas de Gran Canaria, Spain.
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MeSH Terms
Blood Flow Velocity / physiology
Fetal Heart / physiopathology,  ultrasonography*
Gestational Age
Heart Defects, Congenital / physiopathology,  ultrasonography*
Laser-Doppler Flowmetry
Nuchal Cord / embryology,  ultrasonography*
Prospective Studies
Regional Blood Flow / physiology
Ultrasonography, Prenatal

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