title: Ultrasonic localization of neonatal umbilical catheters.
mesh_terms: D002404:Catheterization; D006801:Humans; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000628:therapy*; D014465:Ultrasonics; D014469:Umbilical Arteries; D014471:Umbilical Veins