Abstract
Article: An Absent Right Umbilical Artery Versus Absent Lt and the Prognostic Implications for the Fetus
Authors: Jennifer Durant, BS, RDMS, RDCS, RVT, Douglas Helm, MD, Karen Having, MS ED, RT(R), RDMS, Joy D. Guthrie, PhD, RDMS, RDCS, RVT, RCS, RCCS, RVS, FSDMS
Category: Ob/Gyn
Credit: 1.0 SDMS CME Credit
Objectives: After studying the article entitled “An Absent Right Umbilical Artery Versus Absent Lt and the Prognostic Implications for the Fetus,” you will be able to:
Determine the appropriate images to document the number of umbilical arteries
Explain the clinical significance of a single umbilical artery
Determine appropriate follow-up studies for patients noted to have a single umbilical artery
Findings of a single umbilical artery increase the likelihood of finding fetal anomalies, IUGR, mortality/morbidity, and aneuploidy by approximately 2 times 5 times 7 times 20 times
The more common persistence of the right umbilical artery over the left, in the two-vessel cord, is believed to be due to its Angle of entrance into the fetal abdomen Larger caliber Thicker walls Strength
A normal umbilical cord coiling index is 0.10–0.20 0.20–0.37 0.17–0.41 0.26–0.47
The image that should be documented to show the number of vessels that exist in the umbilical cord is the Transverse abdomen showing the intra-abdominal umbilical vein Long-axis view of a free-floating umbilical cord, midcord Transverse view of a free-floating umbilical cord, midcord Transverse view demonstrating the umbilical arteries coursing around the fetal bladder
What should be documented just before the image is taken of the number of cord vessels? Four-chamber heart Situs images Sagittal view of fetal lie Transverse bladder
Over 40% of the single umbilical arteries found in this study were from patients who were Diabetic <12 weeks’ gestational age Obese Multiparous
When a single umbilical artery is noted on an obstetric sonogram, what other examination(s) should be performed? Genetic counseling Detailed sonogram Fetal echocardiogram All the above
The prevalence of a single umbilical artery is approximately 1% 5% 10% 20%
The diameter and protective layer (Wharton’s jelly) of a three-vessel cord _______ well into the third trimester. Decrease Increase Stay the same Have a diameter decrease and a protective layer increase
This retrospective research study suggests that there is a _____ times greater association of an absent right umbilical artery with genitourinary anomalies, congenital heart disease, or aneuploidy. 5 7 9 15
Footnotes