Tissue colouring with exogeneous chromophores to extend surgical sue of 808 nm diode lasers

摘要

Lasers with a wavelength between 351-1064nm, present fluence and pulse duration induce a selective thermolysis of tissue chromophores. SPecific exogenous chromophores, such as indocyanine green, are used in ophthalmology, in photodynamic therapy (PDT), in welding, and more recently for epilation. The aim of our study was to assess the effectiveness of a wavelength of 808nm on tissues stained with different exogeneous chromophores hwose absorption curves we studied by spectrophotometer. Out of five chromophores, methylene blue proed to be effective at 808nm. we tested the diode laser 080 nm, (eufoton-Trieste) at focussed powrs of 1, 2, 3, 5, 7 W in cw, for 1, 2, 3, 5, 7, 10 sec on skin specimens stained with 1