As you know the quantitation of bilirubin in serum (pale yellow) is based on the formation of a reddish-purple colour, and in my case, the colour of serum is blue-green (biliverdin colour). so when I added the reagent the colour doesn't change to reddish-purple, but after 2 hours changed that is mean all the biliverdin convert to bilirubin.
Billy Sanchez-Jacinto
Dear: Elgumati
It´s interesting case because possibly sample serum predominance direct bilirubin a cause hepatic biliary obstruction present a similar color green and this presence biliverdin.
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