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Neonatal cholestasis refers to elevated levels of conjugated bilirubin identified in newborn infants within the first few months of life. [1] Conjugated hyperbilirubinemia is clinically defined as >20% of total serum bilirubin or conjugated bilirubin concentration greater than 1.0 mg/dL regardless of total serum bilirubin concentration. [2]
Neonatal jaundice is a yellowish discoloration of the white part of the eyes and skin in a newborn baby due to high bilirubin levels. [1] Other symptoms may include excess sleepiness or poor feeding. [1] Complications may include seizures, cerebral palsy, or kernicterus. [1] In most of cases there is no specific underlying physiologic disorder. [2]
The bilirubin-UGT enzyme performs a chemical reaction called glucuronidation. Glucuronic acid is transferred to unconjugated bilirubin, which is a yellowish pigment made when your body breaks down old red blood cells, [35] and then being converted to conjugated bilirubin during the reaction. Conjugated bilirubin passes from the liver into the ...
Bilirubin (BR) (from the Latin for "red bile") is a red-orange compound that occurs in the normal catabolic pathway that breaks down heme in vertebrates.This catabolism is a necessary process in the body's clearance of waste products that arise from the destruction of aged or abnormal red blood cells. [3]
Infant undergoing bili light therapy in a United States maternity ward. A bili light [1] [2] is a light therapy tool to treat newborn jaundice (hyperbilirubinemia).High levels of bilirubin can cause brain damage (kernicterus), leading to cerebral palsy, auditory neuropathy, gaze abnormalities and dental enamel hypoplasia.
Lucey–Driscoll syndrome is an autosomal recessive metabolic disorder affecting enzymes involved in bilirubin metabolism. [1] It is one of several disorders classified as a transient familial neonatal unconjugated hyperbilirubinemia. [citation needed]
In 1968, Dr. Jerold Lucey demonstrated that hyperbilirubinemia of prematurity (a form of neonatal jaundice) could be successfully treated through exposure to artificial blue light. [9] This led to widespread use of phototherapy, which has now become a mainstay of treatment of neonatal jaundice. [10]
This test helps to identify the type of jaundice. The serum of the patient is mixed with diazo reagent. If a red colour develops immediately it is called a direct positive. It happens if conjugated bilirubin is present. In an indirect positive test, the patient's serum is first treated with alcohol and later mixed with diazo reagent.