Med Lasers.  2024 Dec;13(4):219-223. 10.25289/ML.24.029.

Novel small spot-high fluence 1,064 nm Q-switched neodymium-doped yttrium aluminum garnet (Q-Nd:YAG) laser toning approach using quadruple pulsing clears epidermal pigmented lesions safely and effectively: case reports

• Hwang JK

• KMID: 2564471
• DOI: http://doi.org/10.25289/ML.24.029

Abstract

A new 1,064 nm Q-Nd:YAG system developed by the author offers a quadruple-pulse (Q4) mode as a 1,064 nm laser toning method for epidermal pigmented lesions (EPLs) traditionally treated using the 532 nm wavelength. EPLs in seven Korean subjects were treated with the Q-Nd:YAG in Q4 mode with a zoom handpiece using a 2 mm spot, 26-40 J/cm ² fluence at 10 Hz. The endpoint was a grayish color change or frosting. Two-four sessions were given, two-three weeks apart, with a follow-up of three-four weeks after the final session. A Global Aesthetic Improvement Scale (GAIS) and patient satisfaction were scored, and the pain was assessed on a visual analogue scale. The target lesions cleared well in all subjects with high GAIS scores and patient satisfaction. No adverse events were noted; the downtime was short, and the pain was reasonable. The author’s Q4 toning approach proved safe and effective for EPLs.

Keyword

Laser toning; Multipulse train; Photoacoustic effect; Grayish color change; Frosting