Q-switched ruby laser therapy of nevus of Ota

Roy G. Geronemus

doi:10.1117/12.137356

1 June 1992 Q-switched ruby laser therapy of nevus of Ota

Roy G. Geronemus

Proceedings Volume 1643, Laser Surgery: Advanced Characterization, Therapeutics, and Systems III; (1992) https://doi.org/10.1117/12.137356
Event: OE/LASE '92, 1992, Los Angeles, CA, United States

Abstract

The Q-switched ruby laser has been demonstrated to provide selective photothermolysis of pigmented tissue at a wavelength of 694 nm and a pulsewidth of 40 nanoseconds. It was utilized to treat 15 patients with nevus of Ota involving the face with an age range of 6 - 52 years. Eleven of the 15 patients were Asian, 2 were Caucasian, 1 was Hispanic, and 1 was Indian. The energy fluence utilized varied between 6 and 10 J/cm², and the number of treatments ranged from 1 to 7. Significant lightening or clearing was noted at the higher energy ranges of 9 - 10 J/cm² with significantly less lightening noted at the lower energy range of 6 - 8.5 J/cm². No scarring was noted in any of the 15 patients, and some isolated hypopigmentation was noted in one of the subjects. Transient post-inflammatory hyperpigmentation was noted in only one patient. Complete clearing has been noted in four patients. Q-switched ruby selective photothermolysis appears to be an effective and safe method of lightening or removing nevus of Ota.

Citation Download Citation

Roy G. Geronemus "Q-switched ruby laser therapy of nevus of Ota", Proc. SPIE 1643, Laser Surgery: Advanced Characterization, Therapeutics, and Systems III, (1 June 1992); https://doi.org/10.1117/12.137356

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