Umbilical cord from and contains remnants of the yolk sac and allantois. It forms by the fifth week of development, replacing the yolk sac as the source of nutrients for the embryo. The cord is not directly connected to the mother's circulatory system, but instead joins the placenta, which transfers materials to and from the maternal blood without allowing direct mixing. The length of the umbilical cord is approximately equal to the crown-rump length of the fetus throughout pregnancy. The umbilical cord in a full term neonate is usually about 50 centimeters (20 in) long and about 2 centimeters (0.75 in) in
Umbilical line left portal vein, passing through the patent ductus venosus to the inferior vena cava and right atrium. Appropriate UVC tip position is in the high inferior vena cava to the low right atrium, typically within 1 cm of the diaphragm. If the UVC tip is proximal to ductus venosus it can lead to administration of intravenous fluids into the portal system, with potential portal vein thrombosis, or, in cases of TPN administration, a TPN abscess. Umbilical line An umbilical line is a catheter that is inserted into one of the two arteries or the vein of the umbilical cord. Generally