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KMID : 1037020140030010031
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Medical Lasers; Engineering, Basic Research, and Clinical Application
2014 Volume.3 No. 1 p.31 ~ p.34
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Long-Pulsed 755-nm Alexandrite Laser-Induced Postinflammatory Hyperpigmentation Treated with 1,064-nm Nd:YAG Laser: Time Course Follow-Up
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Kim Young-Koo
Cho Su-Hyun
Goo Bon-Cheol
Kang Jin-Soo
Cho Sung-Bin
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Abstract
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Long-pulsed 755-nm alexandrite laser has been used effectively and safely for treatment of various pigmented lesions. However, in Asian patients, the risk of postinflammatory hyperpigmentation (PIH) is high when epidermal pigmented lesions are treated with this laser using a large beam size. In this report, we described a female patient with long-pulsed alexandrite laser treatment-induced PIH. We found that long-pulsed alexandrite laser-induced PIH presented clinically along with demarcated and darkly pigmented macules compared to PIH by other Q-switched pigment lasers. In addition, all of the lesions with PIH showed abrupt improvement rather than gradual improvement after eight sessions of 1,064-nm Q-switched Nd:YAG laser with low fluence. Additionally, we delivered 1,064-nm Nd:YAG laser energy on the PIH lesions using a quick pulse-to-pulse (Q-PTP) mode. We suggest that the additional use of a Q-PTP mode could have played an important role in the marked improvement of alexandrite-induced PIH.
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KEYWORD
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Long-pulsed alexandrite laser, Post-inflammatory hyperpigmentation, Nd:YAG laser, Quick pulse-to-pulse, Dual pulse
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