By Keyvan Nouri
Laser know-how is continually evolving and progressing. using laser treatment is significantly increasing and consequently a clinical booklet of this importance is important. Lasers and light-weight Therapy comprises an updated finished examine lasers and lightweight treatment not just within the box of Cutaneous Laser surgical procedure, yet in different clinical specialties as well.
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Extra resources for Lasers in Dermatology and Medicine
Also the partial clot enhances absorption venous red blood. 25–1 s) intervals results in progressive graying or darkening of the lesions. On the other hand, repeated passes (after >1 min) will result in cumulative extent. 13). 98 Water and collagen become less bound such that the effective scattering coefficient of the dermis is reduced. Already this concept has been applied to increase the visibility of blood vessels from the surface. Possible applications include tattoo removal, where particles often are found several mm deep in tissue.
Although the 410 nm peak achieves the greatest theoretical vascular to pigment damage ratio among the other peaks, scattering is too strong for violet light to be a viable option for vascular applications. Melanin: Most pigmented lesions result from excessive melanin in the epidermis. By choosing almost any wavelength (<800 nm), one can preferentially heat epidermal melanin. , 1,064 nm). 61 Although the ratios of fat to water absorption are small, the small differences are exploited with the proper choice of parameters.
More importantly, the thick slab of melanocytes will take long to cool, such that the will be considerable heat diffusion away from the target. On the other hand, the lentigo represents a slab only tens of microns thick; there will be heat diffusion during the long pulse and rapid cooling after the pulse. Thus, with ms-domain fluences, the nevus case might result in scarring, and a lighter lentigo might not become hot enough for clearance. If one applies ns pulses to the two lesion types, the lentigo shows a good response with possibly complete clearing, whereas the nevus will require multiple sessions, as each laser application will result in heat confined to the most superficial part of the lesion.
Lasers in Dermatology and Medicine by Keyvan Nouri