Abstract
Article: Agenesis of the Ductus Venosus With Extrahepatic Umbilical Vein Connection Into the Right Atrium
Authors: Sharon Gore, RDMS, RDCS, Melissa Smith, RDMS, RVT, RDCS, Colleen Nessling, BSRT, RDMS
Category: OB/GYN
Credit: 1.0 SDMS CME Credit
Objectives: After studying the article entitled “Agenesis of the Ductus Venosus With Extrahepatic Umbilical Vein Connection Into the Right Atrium,” you will be able to:
Evaluate for normal umbilical vein anatomy
Diagnose the common aberrant connections of the umbilical vein
Use the CardioVascular Profile to help assess fetal cardiac well-being
The ductus venosus connects the intra-abdominal umbilical vein to the Portal vein Hepatic vein Inferior vena cava Right atrium
In the absence of the ductus venosus in utero, the worst prognosis occurs with an umbilical vein connection directly into the Inferior vena cava Renal veins Portal vein Right atrium
Embryologic development of the ductus venosus involves the Vitelline veins, umbilical veins, and cardinal veins Vitelline veins, umbilical veins, and hepatic veins Vitelline veins, umbilical veins, and portal vein Vitelline veins, umbilical veins, and renal veins
The ductus venosus develops in utero approximately how many days after conception? 15 to 20 21 to 35 36 to 47 48 to 62
In the absence of the ductus venosus in utero, the most common type of umbilical vein connection is directly into the Inferior vena cava Renal veins Portal vein Right atrium
A patent ductus venosus provides a shunt that bypasses approximately what percentage of blood flow from the liver microcirculation? 75% 80% 85% 90%
In the postnatal period, the ductus venosus typically closes how long after birth? 1 week 2 weeks 1 to 3 months 4 to 6 months
A normal umbilical artery flow signal is typically Low resistance, with diastolic flow throughout the cardiac cycle Moderate resistance, with no end-diastolic flow High resistance, with no end-diastolic flow High resistance, with reversed diastolic flow
A normal ratio of fetal heart area to chest area is less than 0.25 0.30 0.35 0.40
Normal peak systolic velocity in the ductus venosus late in the second trimester is typically 140 cm/s 175 cm/s 200 cm/s 260 cm/s
Footnotes