Search results
Results from the WOW.Com Content Network
The bilirubin level found in the body reflects the balance between production and excretion. 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
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 ...
When total bilirubin levels exceed 40 μmol/L, bilirubin deposition at the sclera, skin, and mucous membranes will give these areas a yellow colour, thus it is called jaundice. [6] The increase in predominantly unconjugated bilirubin is due to overproduction, reduced hepatic uptake of the unconjugated bilirubin and reduced conjugation of bilirubin.
Jaundice, also known as icterus, is a yellowish or greenish pigmentation of the skin and sclera due to high bilirubin levels. [3] [6] Jaundice in adults is typically a sign indicating the presence of underlying diseases involving abnormal heme metabolism, liver dysfunction, or biliary-tract obstruction. [7]
Cholestasis can be excluded by normal levels of bile acids in plasma, the absence of lactate dehydrogenase, low levels of conjugated bilirubin, and ultrasound scan of the bile ducts. [citation needed] Vitamin B12 deficiency - elevated bilirubin levels (and MCV counts above 90–92) can be associated with a vitamin B12 deficiency. [citation needed]
Rotor syndrome (also known as Rotor type hyperbilirubinemia) [2] is a rare cause of mixed direct (conjugated) and indirect (unconjugated) hyperbilirubinemia, relatively benign, autosomal recessive [3] bilirubin disorder characterized by non-hemolytic jaundice due to the chronic elevation of predominantly conjugated bilirubin. [2]
The bilirubin present in the plasma is largely unconjugated in this setting as they haven't been taken up and conjugated by the liver. [3] In this case, total serum bilirubin increases while the ratio of direct bilirubin to indirect bilirubin remains 96 to 4 as up to 96%-99% of bilirubin in the bile are conjugated mentioned above. [9] [1]
The presence of urobilinogen and its increased levels indicate that there are more than normal amounts of bilirubin in the intestine, showing that jaundice observed is not due to the blockage of bile flow, and is of pre-hepatic or hepatic causes. [32] Normal colour of the patient's urine indicates the absence of unconjugated bilirubin. [27]