Before leaving the hospital with your newborn, you can ask the doctor or nurse about a jaundice bilirubin test.
A doctor or nurse may check the baby’s bilirubin using a light meter that is placed on the baby’s head. This results in a transcutaneous bilirubin (TcB) level. If it is high, a blood test will likely be ordered.
The best way to accurately measure bilirubin is with a small blood sample from the baby’s heel. This results in a total serum bilirubin (TSB) level. If the level is high, based upon the baby’s age in hours and other risk factors, treatment will likely follow. Repeat blood samples will also likely be taken to ensure that the TSB decreases with the prescribed treatment.
Bilirubin levels are usually the highest when the baby is 3 to 5 days old. At a minimum, babies should be checked for jaundice every 8 to 12 hours in the first 48 hours of life and again before 5 days of age.