Unconjugated bilirubin, conjugated bilirubin, and mixtures of various proportions of each were dissolved in depigmented human serum. These, together with normal and pathologic native human sera, were analyzed for conjugated, unconjugated, and total bilirubin by the Weber-Schalm method. Results were compared with the determination of “prompt direct reacting bilirubin” and of total bilirubin by t...

Background: Considering the increasing rates of early hospital discharge and kernicterus in healthy full term newborns, timely identification of neonates at risk of severe hyperbilirubinemia is of great significance. The aim of this study was to investigate the predictive value of umbilical cord serum (UCS) bilirubin level for subsequent hyperbilirubinemia. Moreover, we compared the predictive ...

The Du Pont aca “NBIL” test (Du Pont Instruments, Wilmington, DE 19898) also measures bilirubin spectrophotometrically. Figure 2 shows an approximate linear relationship between “apparent” biliburin concentration, as measured with the Bilirubin Stat-Analyzer and the aca NBIL test, vs Liposyn concentration in a neonatal serum sample. This sample without added Liposyn gave identical total bilirub...

BACKGROUND AND OBJECTIVE Glucose-6-phosphate dehydrogenase (G-6-PD) deficiency is frequently associated with neonatal hyperbilirubinemia, which in severe cases may cause kernicterus and death. Because G-6-PD-deficient individuals frequently undergo acute, trigger-induced hemolytic episodes, increased hemolysis has frequently been implied in the pathogenesis of this neonatal hyperbilirubinemia. ...

Although phototherapy was introduced as early as 1950's, the potential biological effects of bilirubin photoisomers (PI) generated during phototherapy remain unclear. The aim of our study was to isolate bilirubin PI in their pure forms and to assess their biological effects in vitro. The three major bilirubin PI (ZE- and EZ-bilirubin and Z-lumirubin) were prepared by photo-irradiation of unconj...

one of the causes of neonatal hyperbilirubinemia is increased reabsorption of bilirubin from meconium in the gastrointestinal tract. this occurs when the conjugated bilirubin which is excreted into the colon is 'unconjugated by beta glucuronidase activity, present in the neonatal intestine, which hydrolyzes bilirubin diglucuronide into unconjugated bilirubin, which subsequently is reabsorb...