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Papers of The 2nd Japan Scar Workshop |
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21. Efficacy of 1064nm Nd:YAG laser on keloid and hypertrophic scar
Satoshi Akaishi, Kyoko Kobe, Sachiko Koike, Hiko Hyakusoku
Department of Plastic and Reconstructive Surgery, Nippon Medical School,
Tokyo, Japan
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OBJECTIVE: Lasers have been used in the treatment of hypertrophic scars
and keloids since the 1980’s. Pulsed dye lasers are currently considered
the best choice though many studies were suspicious about their
effectiveness. The purpose of this study is to investigate the effect of
1064nm Nd:YAG laser on hypertrophic scars and keloids. METHODS: Twelve
keloids and 3 hypertrophic scars of 15 patients were treated using a
1064nm Nd:YAG laser with a 5 mm spot size, fluences of 14 J/cm2 and
pulse widths of 0.3 msec, every 3 to 4 weeks. Biopsies of treated and
untreated regions were examined and assessed histologically and
microscopically. RESULTS: After a mean of 11.8 treatment sessions,
clinical assessments of the scars were improved. Clinical assessment
(scar volume, erythema, hardness, itch and pain) were classified from 0
to 3 points. There was a decrease from 9.2 to 6.7 points after laser
treatment. Histological and microscopic examination revealed that the
collagen fibers where laser was applied were disrupted at 3 days after
irradiation but not at 1 day after irradiation. RESULTS: During the
laser treatments, a decrease in clinical assessment was reported.
Histological and microscopic findings will support the effectiveness of
Nd:YAG laser. The optimal laser is currently 585 nm PDL, although the
recent results of 1064nm Nd:YAG laser are promising. |
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