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Intensified phototherapy using daylight fluorescent lamps

1999; Wiley; Volume: 88; Issue: 7 Linguagem: Inglês

10.1111/j.1651-2227.1999.tb00040.x

1651-2227

Manoel de Carvalho, Debora De Carvalho, Sonia Trzmielina, JMA Lopes, TWR Hansen,

Methemoglobinemia and Tumor Lysis Syndrome

Jaundice is a common reason for therapeutic intervention in newborn infants and phototherapy is effective treatment if enough light energy is delivered 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 are placed immediately under the floor of a transparent plexiglass crib. The efficacy of this unit, delivering ?19 μW/cm 2 /nm, was compared with that of two conventional phototherapy units using overhead lamps placed 35 cm above the infants. One unit used daylight fluorescent tubes and delivered ?4 μW/cm 2 /nm, the other unit used special blue fluorescent tubes and delivered ?22 μW/cm 2 /nm. Fifty‐one infants were included in the analyses, all of them breastfed on demand. Serum bilirubin levels were determined spectrophotometrically at 0, 12 and 24 h. The decrement in serum bilirubin concentrations was significantly greater 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 countries. □ Neonatal jaundice, phototherapy, wavelength