[Fractionated P-bilirubins].
A diazo-based dry film technique for the estimation of different bilirubins in plasma is now available. This procedure separates bilirubins from icteric sera into three separate fractions: bilirubin (unconjugated), bilirubin-glucuronides (mono + diglucuronide) and bilirubin-albumin. In newborns with prolonged jaundice classification of hyperbilirubinemia is of importance for choice of treatment. While binding of bilirubin and bilirubin-glucuronides to albumin is non covalent, reversible, bilirubin-albumin appears to be firmly associated with albumin by covalent bonds. This causes delayed clearance of this bilirubin fraction from plasma as the half-life of albumin is approximately 18 days. Hence the substance concentration of bilirubin-albumin will decrease at a slower rate than will bilirubin and bilirubin-glucuronide, despite hepatobiliary recovery. Bilirubin-albumin may therefore prove of value in the differentiation between different clinical entities with hyperbilirubinemia.
Schou
C S
CS
Mortensen
H
H
D001663:Bilirubin / Q000097:blood*; D006801:Humans; D006932:Hyperbilirubinemia / Q000097:blood; D007231:Infant, Newborn; D007567:Jaundice, Neonatal / Q000097:blood; D012709:Serum Albumin / Q000378:metabolism
D012709:Serum Albumin; D001663:Bilirubin
P-bilirubiner, fraktioneret.