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 placement) or until blood return is noted.
Depth of umbilical vein catheter placement is often estimated using body surface measurement.
We wished to determine whether estimating insertion depth of umbilical catheters using birth weight, rather than surface measurements, results in more correctly positioned catheters.