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High levels of bilirubin, a brownish yellow component of liver bile resulting from the decomposition of old blood cells, indicates brain injury or other problems in newborns. The reference range, normal values, vary from lab to lab, with respect to the age and term of the newborn, states WebMD.


According to the American Pregnancy Association, serum bilirubin levels that exceed 10 milligrams at under 24 hours after birth, above 15 milligrams at 24 to 48 hours after birth, above 18 milligrams at 49 to 72 hours after birth and above 20 milligrams after 72 hours beyond birth require treatment.


Values derived from a blood bilirubin test are known as bilirubin levels. Bilirubin is a brownish-yellow substance formed in the liver after it breaks down old red blood cells. It circulates in the bloodstream, and a blood test can be used to determine blood bilirubin levels, according to WebMD.


Bilirubin, a brownish yellow substance, is produced by the body when it breaks down spent red blood cells. After processing in the liver, the material is then expelled by the bowels. The two kinds of bilirubin are indirect and direct.


A healthy patient should have direct, or conjugated, bilirubin levels of 0 to 0.3 milligrams per deciliter of blood and 0.3 to 1.9 milligrams per deciliter of blood of total bilirubin, according to Medline Plus. A patient's bilirubin levels are checked through a simple blood test.


BiliTool provides an interactive tool on its website to calculate the relative risk to and appropriate treatment for an infant based on the bilirubin level, age in hours and gestational age. Bilirubin is a byproduct of decaying red blood cells, says BabyCenter. In most infants, the liver naturally p


High bilirubin test results may be indicative of blood disorders or impaired liver function, such as liver disease or blocked bile ducts. Too much bilirubin, or hyperbilirubinemia, in newborn babies can cause brain damage, according to WebMD.


Bilirubin is produced in the liver when it breaks down old red blood cells, states WebMD. It then circulates through the bloodstream as conjugated, or direct, or unconjugated, or indirect, bilirubin. Total bilirubin levels are measured in the blood, while unconjugated bilirubin levels are derived fr


In general, a total bilirubin level above 1.9 milligrams per deciliter is considered elevated, notes MedlinePlus. The normal range for total bilirubin level in the blood is 0.3 to 1.9 milligrams per deciliter. Direct, or conjugated, bilirubin normally ranges from 0 to 0.3 milligrams per deciliter.


A high bilirubin level is not a disease but a symptom and is treated according to the condition that caused it in the first place, according to WebMD. Causes of high bilirubin include infections of the gallbladder, liver damage and conditions that block the gallbladder ducts.