Accurate prediction of insertion umbilical vein catheter depth of UVC as well as confirmation of the position after insertion by radiograph or with ultrasound is very important to avoid complications.
the catheter. forceps, then insert the end into the lumen of the umbilical vein. Dilate the opening by allowing the ends of the forceps to separate, then insert the catheter into the lumen of the umbilical vein and advance it gently toward the liver for 4 to 5 cm（umbilical vein catheter depth） or until blood return is noted.