GUT TRANSIT TIME AND LACTOSE MALABSORPTION DURING PHOTOTHERAPY

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Abstract
Newborn infants (30) with normal birth weight suffering from uncomplicated hyperbilirubinemia were studied. Infants (15) received ordinary phototherapy and 15 infants received intensive phototherapy (blue double light). All infants received their mothers'' milk or fresh milk from mothers of other newborn infants of the same age. All infants had normal lactose tolerance test during the phototherapy, except 1 infants receiving ordinary phototherapy. The flat lactose tolerance test of this infant was false positive since the gut transit time was relatively long. The gut transit time was significantly shorter in the infants treated with intensive phototherapy than in those treated with ordinary phototherapy without any significant difference in the increase in blood glucose by lactose tolerance tests. Lactose malabsorption is apparently not the usual cause of the reduced gut transit time during phototherapy, even if the infants receive their mothers'' milk.

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