The ultrasonic appearance of the umbilical cord.
We have used a combination of linear-array real time and contact sector scanning to image the umbilical veins and arteries. The best images are made perpendicular to the cord. The arteries spiral the vein and the cord is a tortuous structure. Thus there is considerable variability of the appearance of the arteries and veins depending upon the plane of the section.
D004301:Doppler Effect; D005260:Female; D006801:Humans; D011247:Pregnancy; D011263:Pregnancy Trimester, Third; D012039:Regional Blood Flow; D014463:Ultrasonography; D014469:Umbilical Arteries / Q000033:anatomy & histology; D014470:Umbilical Cord / Q000098:blood supply; D014471:Umbilical Veins / Q000033:anatomy & histology