Abstract
Thirty-four preterm newborn infants suffering from uncomplicated hyperbilirubinemia were studied. The infants received ordinary phototherapy continuously during 48 h. The serum unconjugated bilirubin concentration decreased significantly during the treatment. A significant correlation between the changes in the serum bilirubin concentration and the changes in the serum reserve albumin concentration for binding of bilirubin was measured. The risk of bilirubin encephalopathy is evidently reduced by phototherapy in preterm infants.