LED induced photocoaugulation
Based on a PCT patent owned by Light4Tech, the photocoagulator is a compact and easy to use
device able to induce haemostasis of skin blood vessels through a photo-thermo-coagulation
process, without damaging the surrounding tissues.
The main mechanism at the basis of photocagulator is photo-thermo haemostasis, which relies on
the conversion of radiant energy to heat by (de)oxyhaemoglobin and subsequent heat diffusion that
results in thermal denaturation of blood and vascular tissue.
The selectivity of such process, namely the specific absorption of the radiation wavelength by
haematic components, without interacting with other tissues is essential to ensure the minimum
invasivity of the technique. An extensive testing of the device by Light4Tech, allowed a validation of
the working principles and allowed to estimate the range of spectrum, time, and radiation power
characteristics required for effective healing, with an exposure time of about 15-30 seconds. After three days from the occurrence of the wounds, the area subjected to light
photocoagulation is almost completely restored, while the unexposed area
still presents thick crusts, indicating that the total healing process is made
considerably faster by means of this technology.
There are consistent advantages in using this device: is is more compact, making it portable device
easier, have low energy consumption and it is cheaper than laser sources.
F. Rossi, R. Pini, G. de Siena, D. Massi, F. S. Pavone, D. Alfieri, G. Cannarozzo, A blue-LED-based device for selective photocoagulation of superficial abrasions: theoretical modeling and in vivo validation, Photonic Therapeutics and Diagnostics VI. Edited by Kollias, Nikiforos; Choi, Bernard; Zeng, Haishan; Malek, Reza S.; Wong, Brian J.; Ilgner, Justus F. R.; Gregory, Kenton W.; Tearney, Guillermo J.; Marcu, Laura; Hirschberg, Henry; Madsen, Steen J.; Mandelis, Andreas; Mahadevan-Jansen, Anita; Jansen, E. Duco. Proceedings of the SPIE, Volume 7548, pp. 754807-754807-7 (2010).