Ductus venosus blood flow evaluation at 11–14 weeks in the anticipation of twin-twin transfusion syndrome in monochorionic twin pregnancies

2001 ◽  
Vol 1 (4) ◽  
pp. 315-321
Author(s):  
A. Matias ◽  
N. Montenegro ◽  
J. C. Areias
Keyword(s):  
Blood Flow ◽  
Ductus Venosus ◽  
Monochorionic Twin ◽  
Twin Pregnancies ◽  
Blood Flow Evaluation

Ductus venosus revisited: A Doppler blood flow evaluation in the first trimester of pregnancy

1997 ◽  
Vol 23 (2) ◽  
pp. 171-176 ◽  
Author(s):  
Nuno Montenegro ◽  
Alexandra Matias ◽  
JoséCarlos Areias ◽  
Henrique Barros
Keyword(s):  
Blood Flow ◽  
First Trimester ◽  
Ductus Venosus ◽  
First Trimester Of Pregnancy ◽  
Blood Flow Evaluation

scholarly journals Improving our Knowledge in Twins: The Role of Ductus Venosus in the First Trimester

2013 ◽  
Vol 7 (4) ◽  
pp. 409-414
Author(s):  
Nuno Montenegro ◽  
Alexandra Matias
Keyword(s):  
Blood Flow ◽  
Obstet Gynecol ◽  
Chromosomal Abnormalities ◽  
First Trimester ◽  
Ductus Venosus ◽  
Abnormal Karyotype ◽  
Cardiac Defects ◽  
Twin Pregnancies ◽  
Singleton Pregnancies

ABSTRACT Ductus venosus (DV) is a tiny vessel with a central role in fetal circulation both in singletons and multiples. In the present review we detail the contribution of DV evaluation in twin pregnancies in the first trimeter of pregnancy. The higher prevalence of abnormal A-wave in fetuses with abnormal karyotype and/or cardiac defects made DV evaluation a useful marker for the screening of chromosomal abnormalities and fetal cardiac anomalies. In dichorionic (DC) pregnancies, DV blood flow assessment reproduces the role of NT in the screening for aneuploidies, just as in singleton pregnancies. In monochorionic (MC) twin pregnancies, the Doppler assessment of DV blood flow improves the detection of those at higher risk of developing twin-to-twin transfusion syndrome or growth discrepancy later in pregnancy. As for singletons, DV should be systematically evaluated in all first trimester scans for a more performant screening in multiples. How to cite this article Matias A, Montenegro N. Improving our Knowledge in Twins: The Role of Ductus Venosus in the First Trimester. Donald School J Ultrasound Obstet Gynecol 2013;7(4):409-414.

scholarly journals Ductus Venosus: A Love Story of 14 Years

2011 ◽  
Vol 5 (2) ◽  
pp. 141-149 ◽  
Author(s):  
Nuno Montenegro ◽  
Alexandra Matias
Keyword(s):  
Blood Flow ◽  
Chromosomal Abnormalities ◽  
False Positive Rate ◽  
First Trimester ◽  
Nuchal Translucency ◽  
Ductus Venosus ◽  
Love Story ◽  
Positive Rate ◽  
Trimester Screening ◽  
Twin Pregnancies

ABSTRACT Ductus venosus is a tiny vessel with a central role in fetal circulation. Combining B-mode with color and pulsed Doppler is feasible to identify this vessel and evaluate the blood flow waveform at 11 to 13 weeks. The higher prevalence of abnormal A-wave in fetuses with abnormal karyotype and/or cardiac defects turned DV evaluation into a useful marker for chromosomal abnormalities and cardiopathies. Even when combined with nuchal translucency (NT) or biochemical markers, DV blood flow evaluation contributes to an increase in sensitivity and reduces false-positive rate. Abnormal ductal flow is also related to a worse fetal and perinatal outcome. In monochorionic twin pregnancies, in addition to NT measurement at 11 to 14 weeks, the Doppler assessment of DV blood flow increases relevantly the performance of screening for those at higher risk of developing twin-to-twin transfusion syndrome. This story of 14 years surely contributed to change the way first trimester screening is being implemented.

scholarly journals Quantitative and qualitative Ductus Venosus blood flow evaluation in the screening for Trisomy 18 and 13 — suitability study

2020 ◽  
Vol 91 (3) ◽  
pp. 144-148
Author(s):  
Bartosz Czuba ◽  
Malgorzata Nycz-Reska ◽  
Wojciech Cnota ◽  
Agnieszka Jagielska ◽  
Agata Wloch ◽  
...  
Keyword(s):  
Blood Flow ◽  
Trisomy 18 ◽  
Ductus Venosus ◽  
Blood Flow Evaluation
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