Abstract
In the past several years, Q switched ruby lasers have been found to be effective in the treatment of deep dermal pigmented lesions of the skin, such as Ota's nevus, in addition to other superficial pigmented skin lesions, and at present various types of laser equipment are being clinically employed. Although the recently developed Q; switched ruby laser is expected to supersede the conventional normal- pulsed ruby laser, it takes long time to treat extensive cases because of the small radiation spot size of the Q switched lasers. And it needs several times of irradiation and it takes about from 1 year and half to 2 years to diminish the lesion. However, we have designed a new therapeutic protocol which involves the combined use of both Q-switched and conventional normal- pulsed lasers, exploiting the specific advantages of each type. This new protocol has made it possible to treat patients with Ota's nevus with a high degree of therapeutic effectiveness. We also evaluated the effectiveness of twice irradiation of the Q switched ruby laser to shorten the period for complete diminishing the lesion as well.
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