Intensified phototherapy using daylight fluorescent lamps

Jaundice is a common reason for therapeutic intervention in newborn infants and phototherapy is effective treatment if enough light energy is delivere d to a skin surface area of sufficient size. Narrow spectrum blue light is superior to white Light, but in developing countries fluorescent blue lamps often have to be imported and are much more expensive than white lamps. We developed a phototherapy unit in which seven daylight fluorescent tubes ar e placed immediately under the Boor of a transparent plexiglass crib. The e fficacy of this unit, delivering approximate to 19 mu W/cm(2)/nm, was compa red with that of two conventional phototherapy units using overhead lamps p laced 35 cm above the infants. One unit used daylight fluorescent tubes and delivered approximate to 4 mu W/cm(2)/nm, the other unit used special blue fluorescent tubes and delivered approximate to 22 mu W/cm(2)/nm. Fifty-one infants were included in the analyses, all of them breast-fed on demand. S erum bilirubin levels were determined spectrophotometrically at 0, 12 and 2 4 h. The decrement in serum bilirubin concentrations was significantly grea ter in infants undergoing phototherapy with the new device or with special blue lamps compared to conventional overhead daylight lamps (p < 0.001 both at 12 and at 24 h). We conclude that highly efficient phototherapy may be delivered with daylight fluorescent lamps placed in very close proximity to the patient. Thus, lack of access to expensive imported special blue lamps does not preclude delivery of effective phototherapy in developing countri es.