This video explains the K-Laser Blue Derma surgical laser 445nm blue wavelength technology which targets haemoglobin and melanin, not water like most CO2 and other ablative lasers. This mechanism of action is indirect vaporisation using photothermal and photochemical effects.
The Blue Derma surgical lasers are diode lasers. The specificity of the 445 nm wavelength is that the coefficient of absorption of water is almost nil, compared to the coefficient of haemoglobin and melanin which are very high. Combined with the fact that blue photons are high energy at this level and highly absorbed wherever capillaries are present, it leads to indirect cell vaporisation. The mechanism of indirect cell vaporisation does not target water, but haemoglobin and melanin pigment.
The mechanism involves photothermal and photochemical effects. The photothermal effect refers to the direct heat from the haemoglobin or melanin chromophore, leading to indirect heat of blood vessels and indirect cell vaporization. The photochemical effect refers to the transfer of high-energy photons to the haemoglobin or melanin chromophores into an excited state. This state participates in chemical reactions such as bond breaking, crosslinking and radical formation, leading to photo destruction of the chromophore and cells around it without significant thermal damage.
This type of laser allows high precision during surgery and higher control of the thermal damage in the surrounding tissues. Consequently, post-laser treatments with the 445 nm wavelength compared with traditional ablative lasers demonstrate less oedema and inflammation for the patient.
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