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Effect of incoherent LED radiation on third-degree burning wounds in rats

Date
2011-12-01
Author
Fiorio, Franciane B.
Silveira, Landulfo
Munin, Gberto
Lima, Carlos Jose de
Fernandes, Kristianne P. S.
Mesqui Ta-Ferrari, Raquel Agnelli
Carvalho, Paulo de Tarso C. de
Brandao Lopes-Martins, Rodrigo Alvaro
Aimbire, Flavio [UNIFESP]
Carvalho, Regiane Albertini de
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Abstract
The main physiological characteristics in a burn process are the increase of the capillary permeability and the occurrence of edema and exudation. Light-emitting diode (LED) has been proposed as treatment of burning. This study investigated the effects of LED on the repair process of rat skin submitted to a third-degree burning. the lesions were produced on the dorsal surface of male Wistar rats. Animals were divided into 4 groups (n = 6) as follows: L1 and L2 groups as LED-treated burned rats, and received LED therapy along 7 and 15 days with 48 hours intervals, respectively; C1 and C2 groups as control, non-treated burned rats. A red LED (640 nm, 30 mW) operating with a fluence of 4 J/cm(2) was used. the wound area was measured daily after irradiation. Animals were euthanized at the 8th and 16th days after burning, and the wound fragment was submitted to histology. the inflammatory cells as well as the damaged area at the 8th day after burns were significantly lower for the LED-treated group when compared to control. Furthermore, the LED phototherapy effect on cellular migration was even more pronounced at the 16th day. Our results indicated that the treatment with a LED system was clearly effective in reducing the number of inflammatory cells and improving the healing process in an experimental model of third-degree burnings.
URI
http://repositorio.unifesp.br/handle/11600/34325
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