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Extremely high levels of unconjugated bilirubin in plasma enables bilirubin to cross the blood-brain-barrier to reach the brain and central nervous system to impart damage. This is termed kernicterus, or bilirubin encephalopathy. Kernicterus is rare in adults but is prevalent in newborns with underdeveloped blood-brain barriers and lower ...
Blood test results are advised to always be interpreted using the reference range provided by the laboratory that performed the test. The SI units are μmol/L. [52] Typical ranges for adults are: [53] 0–0.3 mg/dl – Direct (conjugated) bilirubin level; 0.1–1.2 mg/dl – Total serum bilirubin level
The measurement of bilirubin levels in the newborns is done through the use of bilimeter or transcutanoeus bilirubinometer instead of performing LFTs. When the total serum bilirubin increases over 95th percentile for age during the first week of life for high risk babies, it is known as hyperbilirubinemia of the newborn (neonatal jaundice) and ...
Acid–base and blood gases are among the few blood constituents that exhibit substantial difference between arterial and venous values. [6] Still, pH, bicarbonate and base excess show a high level of inter-method reliability between arterial and venous tests, so arterial and venous values are roughly equivalent for these. [44]
Risk factors associated with high serum bilirubin levels include male gender, white ethnicities, and active smoking. [50] Mean serum total bilirubin levels in adults were found to be higher in men (0.72 ± 0.004 mg/dl) than women (0.52 ± 0.003 mg/dl). [50]
Results from the urine test should be confirmed by a complete blood count (CBC) and serum testing for total serum bilirubin and fractionated bilirubin. [32] Increased reticulocytes and the presence of schistocytes in the blood smear of the patient observed during CBC indicates hemolysis. [28]
Van den Bergh reaction is a chemical reaction used to measure bilirubin levels in blood. [1] [2] More specifically, it determines the amount of conjugated bilirubin in the blood. The reaction produces azobilirubin. Principle: bilirubin reacts with diazotised sulphanilic acid to produce purple coloured azobilirubin. [3]
Crigler–Najjar syndrome is a rare inherited disorder affecting the metabolism of bilirubin, a chemical formed from the breakdown of the heme in red blood cells. The disorder results in a form of nonhemolytic jaundice, which results in high levels of unconjugated bilirubin and often leads to brain damage in infants.