![]() ![]() Alexandrite laser treatment is used to remove black, blue and green pigment.The use of Q-switched alexandrite lasers has improved the process of tattoo removal and today is considered the standard of care.Extreme caution is recommended in tanned or darker skinned patients, as the laser can also destroy melanin, resulting in white patches of skin. ![]() The typical settings employed include pulse durations of 2 to 20 milliseconds and fluences of 10 to 40 J/cm 2.Generally ineffective for light coloured hair, but useful for treating dark hair in patients of Fitzpatrick types I to III, and perhaps light-coloured type IV skin.May be used for hair removal in any location including underarms, bikini line, face, neck, back, chest and legs.Light pulses target the hair follicle causing the hair to fall out and minimising further growth.Light pulses target melanin at variable depth on or in the skin.Age spots ( solar lentigines), freckles, flat pigmented birthmarks ( congenital melanocytic naevi), naevus of Ota and acquired dermal melanocytosis.Light pulses target red pigment ( haemoglobin).Spider and thread veins in the face and legs, some vascular birthmarks ( capillary vascular malformations).The following skin disorders can be treated with Alexandrite laser beams. These include Ta2 Eraser™ (Light Age, California, USA), Apogee® (Cynosure, Massachusetts, USA) and Accolade™ (Cynosure, MA, USA), Individual machines may be specially designed to focus on specific skin problems. ![]() The US Food and Drug Administration (FDA) has approved a range of alexandrite laser machines emitting infrared light (wavelength 755 nm) for various skin disorders. Thus alexandrite lasers work by a process of photothermolysis: this means using light (photo) to heat (thermo) a selected area for destruction ( lysis).Īlexandrite lasers cause very precise tissue destruction of the lesion and leave the tissue in the surrounding area undamaged. The wavelength of high energy light emitted by the laser is converted to heat energy and this damages the specific target area. Q-switching refers to the technique of making the laser produce a high-intensity beam in very short pulses. It is considered a red light laser.Īlexandrite lasers are also available in the Q-switched mode. The alexandrite laser produces a specific wavelength of light in the infrared spectrum (755 nm). What is an alexandrite laser?Īn alexandrite laser is one that uses an alexandrite crystal is used as the laser source or medium. The duration of the light pulses affects the laser’s clinical applications in skin surgery. This results in the release of a photon of light as it returns to a stable state. The medium amplifies the light of a particular wavelength as it passes through it. Each of the different types of lasers has a specific range of utility, depending on its wavelength and penetration. They are differentiated by the medium that produces the laser beam. Various kinds of lasers are available for use in skin surgery. Wavelength is measured in nanometres (nm). A LASER (light amplification by stimulated emission of radiation) works by emitting a wavelength of high energy light, which when focused on a certain skin condition will create heat and destroy diseased cells. ![]()
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