PEDIATRICS Vol. 80 No. 3 September 1987, pp. 395-398
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Phototherapy in the Management of Neonatal Hyperbilirubinemia: Efficacy With Light Sources Emitting More Than 500 Nanometers

Giuseppe Sbrana PhD1, Gian Paolo Donzelli MD1, and Corrado Vecchi MD1

1 From the Department of Pediatrics, University of Florence, and the Center for Study of the Chemistry and Structure of Heterocyclic Compounds, Florence, Italy

The clinical action of green fluorescent lamps, properly filtered to remove wavelengths of less than 500 nm, was investigated in a group of 23 newborns with different initial serum bilirubin concentrations. The serum bilirubin levels were measured at 6, 12, 24, and 48 hours after the beginning of phototherapy. These results are compared with those obtained, under the same experimental conditions, in a group exposed to commercial green lamps. Similar bilirubin decline rates were observed in the two experiments. In general, these data confirm the satisfactory clinical efficacy of the green light in phototherapy and prove, in particular, that the blue component present in the emission spectrum of the commercial green lamps has a negligible effect on the bilirubin degradation process.

Key Words: bilirubin • hyperbilirubinemia • phototherapy • photoisomerization • filtered green light

Submitted on July 9, 1986
Accepted on November 25, 1986