Hair Removal Using a Long-Pulsed Alexandrite Laser

    April 1999 in “ Dermatologic Clinics ”
    Keith Ash, Jeff Lord, John Newman, David H. McDaniel
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    TLDR The long-pulsed alexandrite laser is effective for hair reduction, particularly for light-skinned individuals with dark hair, but caution is needed for darker skin.
    In 1999, the long-pulsed alexandrite laser (LPA) was presented as an effective method for hair reduction, especially for individuals with light skin and dark hair. The LPA operates at a 755 nm wavelength and uses the principle of selective photothermolysis to target hair follicles during the anagen phase. A cited study by McDaniel et al. involving 22 patients showed that a 10-msec pulse duration was more effective than other durations, and multiple treatments yielded better results. The recommended treatment protocol includes a fluence of 20 Joules/cm², a 10-mm spot size, and a pulse duration of 10 or 20 msec. Caution is advised for patients with darker skin or recent sun exposure due to potential skin damage. Post-treatment care involves avoiding sun exposure and applying sunscreen, with patient satisfaction generally high compared to other hair removal methods. The document emphasizes the need for ongoing research to refine treatment parameters and assess long-term outcomes.
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