Bilirubin studies on the serum of newborn infants.

pital has about 7000 live births a year, or about 133 pci’ week. Last year ovem 1000 sera of newbormis were analyzed for tile amount of l)ihirubiui 1)r(’sent : hence it was important to employ a method both accurate anol rapiol. As is generally accepted, when the indirect biliruhin iii the serumu reaches 20 nig./100 mmii., ami exchange tramisfusion to prevent keiuuicterus is inolicated. A number of serum bilirubin determinations are required both before aii(I after such a transfusion, as a rise of I nmg./l 00 ml. per hour is considered (langerous (1