| Texto completo | |
| Autor(es): |
Girasol, Carlos Eduardo
;
Moraes, Jose Miguel Andrade Ferraz
;
Bachmann, Luciano
;
Alfredo, Damiao Miranda Ngonga
;
Barbosa, Rafael Inacio
;
Guirro, Elaine Caldeira de Oliveira
;
Guirro, Rinaldo Roberto de Jesus
Número total de Autores: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Lasers in Medical Science; v. 39, n. 1, p. 12-pg., 2024-01-09. |
| Resumo | |
Physical factors and tissue characteristics determine the transmission of light through tissues. One of the significant clinical limitations of photobiomodulation is the quantification of fluence delivered at application sites and optical penetration depth in vivo. There is also the difficulty of determining the distances of the application points to cover a uniformly irradiated area. Thus, the aim was to evaluate in vivo the influence of melanin on light transmission of the 660 nm and 830 nm laser wavelengths on skin and tendon. Thirty young individuals of both sexes were recruited, divided into two groups based on melanin index, and submitted to photobiomodulation protocols in the posterior region of the elbow (skin-skin) and the calcaneus tendon (skin-tendon-skin). The irradiation area was evaluated using a homemade linear array of five sensors. We found significant transmission power values for different melanin indexes and wavelengths (p<0.0001). Also, different equipment can generate significant differences in the transmitted power at an 830-nm wavelength. Average scattering values are 14 mm and 21 mm for 660 nm, in higher and lower melanin index, respectively. For 830 nm, values of 20 mm and 26 mm are indicated. Laser light transmission in vivo tissues is related to wavelength, beam diameter, tissue thickness, and composition, as well as melanin index. The 830-nm laser presents higher light transmission on the skin than 660 nm. The distances between the application points can be different, with higher values for 830 nm than 660 nm. (AU) | |
| Processo FAPESP: | 11/07960-4 - Radiometria ótica de lasers, LEDs e lâmpadas emissoras de radiação ultravioleta |
| Beneficiário: | Luciano Bachmann |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 17/25923-5 - Caracterização óptica no infravermelho próximo de amostras altamente espalhadoras |
| Beneficiário: | Luciano Bachmann |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 18/14955-6 - Fotobiomodulação: avaliação do espalhamento, transmissividade e seus efeitos biológicos em indivíduos saudáveis |
| Beneficiário: | Carlos Eduardo Girasol |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |