Transcutaneous bilirubin measurement in newborns is used to detect the presence of jaundice in children and to determine the level of jaundice. Because newborns are very susceptible to jaundice, jaundice in children is caused by significantly elevated levels of bilirubin in the body. At this time children often have yellow staining of the skin and sclera, so newborns will often be tested for bilirubin levels in their bodies using a transcutaneous bilirubin assay. Because transcutaneous bilirubin measurement is a non-invasive, simple, fast and economical method, it is often necessary to determine the level of jaundice more accurately after an abnormal transcutaneous bilirubin measurement in a newborn.