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6. Photochemical or photodynamic effect
Photodynamic therapy, commonly referred to by the acronym PDT for "PhotoDynamic Therapy", aims to destroy pathological tissue by means of a photochemical reaction. The principle involves marking pathological tissue with an exogenous chemical agent (photosensitizer), then illuminating it with light of the appropriate wavelength to induce a cascade of photochemical reactions leading to the destruction of the treated lesion. The method is based on a two-step process: (i) first, a photosensitizer or a substance that induces the production of this photosensitizer is applied or injected into the area to be treated, resulting in an accumulation of photosensitizer; (ii) then, the area is illuminated with light of a wavelength that is absorbed by the photosensitizer. The therapeutic effect is obtained through low-irradiance illumination (a few tens of mW/cm 2 ...
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Photochemical or photodynamic effect
Conclusion
Bibliography
Websites
Société Francophone des Lasers Médicaux http://www.sflm.org
American Society for Laser Medicine & Surgery, Inc.
Laser Group of the French Society of Dermatology
European Laser Association
International Photodynamic Association
European...
Events
ASLMS Annual Meeting, USA
SFLM Annual Congress, France
Risks and prevention :
Regulations
Medical lasers are approved in accordance with MDD 93-42. http://www.ec.europa.eu/enterprise/policies/european-standards/harmonised-standards/medical-devices/index_en.htm
In France
Statistical and economic data
Each year, Laser Focus World magazine publishes a study on the laser market, and the medical laser market in particular (table 1 and figure
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