Umbilical venous catheterization in the newborn: identification of correct positioning.
D002404:Catheterization; D006801:Humans; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000000981:diagnostic imaging*; D008722:Methods; D011168:Portal System / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D011859:Radiography; D014471:Umbilical Veins / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D014682:Vena Cava, Inferior