Tests and diagnosis
By Mayo Clinic staffYour doctor will likely diagnose infant jaundice on the basis of your baby's appearance. However, it's not possible to judge the severity of jaundice based on appearance alone. Your doctor will need to measure the level of bilirubin in your baby's blood. The level of bilirubin (severity of jaundice) will determine the course of treatment.
Tests to determine jaundice include:
- A physical exam
- A laboratory test of a sample of your baby's blood
- A skin test with a device called a transcutaneous bilirubinometer, which measures the reflection of a special light shone through the skin
Your doctor may order additional blood tests or urine tests if there's evidence that your baby's jaundice is caused by an underlying disorder that needs to be treated.
- Jaundice. American Academy of Pediatrics. http://www.healthychildren.org/English/ages-stages/baby/Pages/Jaundice.aspx. Accessed Feb. 24, 2011.
- Management of hyperbilirubinemia in the newborn infant 35 or more weeks of gestation. American Academy of Pediatrics Policy. http://aappolicy.aappublications.org/cgi/content/full/pediatrics;114/1/297. Accessed Feb. 24, 2011.
- Neonatal hyperbilirubinemia. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merckmanuals.com/professional/sec19/ch274/ch274b.html?qt=neonatal%20hyperbilirubinemia&alt=sh. Accessed Feb. 24, 2011.
- Lease M, et al. Assessing jaundice in infants of 35-week gestation and greater. Current Opinion in Pediatrics. 2010;22:352.
- Cohen RS, et al. Understanding neonatal jaundice: A perspective on causation. Pediatric Neonatology. 2010;51:143.
- Wong RJ, et al. Treatment of unconjugated hyperbilirubinemia in term and late preterm infants. http://www.uptodate.com/home/index.html. Accessed Feb. 24, 2011.
- Moerschel SK, et al. A practical approach to neonatal jaundice. American Family Physician. 2008;77:1255.


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