ISO Er Yag Laser 2940nm Co2 Fractional Laser Erbium Er Yag Laser 2940nm Fotona 4D

First: Brief Introduce

The wavelength of the 2940nm erbium laser coincides with the absorption line of water, which is very attractive in medical applications such as plastic surgery. It is known that water absorbs light in human tissue the largest (>3000cm-1) in the laser. Known as the rejuvenation machine, the skin surgeon's assistant.

Second, Er: YAG laser treatment principle

Interaction of laser tissue

The photothermal effect is the main mode of action in current clinical laser applications. When thermal energy acts on the surface of the tissue, it will directly heat the tissue within an absorption length, and the heat is also conducted to the surrounding tissue through thermal relaxation, not to the adjacent tissue. The heat can vaporize or dislodge tissue near the surface. The rate of tissue removal depends on the rate at which laser energy is concentrated in that tissue. The higher the laser power, the faster the water vaporization and tissue removal, and the removal of the tissue with minimal thermal damage is faster than the surrounding tissue below the heat conduction, which ensures that the coagulation effect is limited to the absorption length of the laser.

Generally, after the first laser exposure, the surface of the skin appears as white bubbles. This change indicates that the intracellular water vaporizes, leaving behind dry protein debris. When these debris is washed away with saline, significant skin shrinkage occurs. The skin is yellowish, and these features are more pronounced in thicker skin such as the perioral area. The thinner parts of the skin such as the upper eyelid have significant shrinkage without obvious yellowing of the tissue. When irradiated for more than three times, some yellow-brown dehydrated protein denatured substances can be seen, these substances represent the denatured collagen of the dermis reticular layer, and then further Charring and thermal diffusion can occur, resulting in tissue necrosis.