Q‐switched ruby versus long‐pulsed dye laser delivered with compression for treatment of facial lentigines in Asians

摘要: Background and Objectives Q-switched lasers have been used for the treatment of lentigines but post-inflammatory hyperpigmentation (PIH) can be an issue especially in Asians. The 595 nm long-pulsed dye laser (LPDL) has vascular lesions although it is well absorbed by oxyhemoglobin, also melanin. To use this device facial lentigines, we attached a flat glass lens to tip laser's handpiece, allowing compression skin during treatment. In doing so, eliminated absorption oxyhemoglobin. This prospective study aims compare efficacy complications such approach Q-switched ruby (QSRL) Asians. Study Design/Materials Methods Eighteen Asian patients (1 male, 17 female) with Fitzpatrick types III–IV were enrolled. One present was treated LPDL method other one QSRL. A emitting wavelength nm, spot size 7 mm used, fluence between 10 13 J/cm2 pulse duration 1.5 milliseconds. Cryogen spray cooling not used. 694 QSRL 4 mm, 6–7 J/cm2, 30 nanoseconds. Lightening assessed reflectance spectrometer Erythema, hypo- or scarring clinical examinators. Results The degree clearing achieved two 70.3% 83.3% LPDL, respectively. All areas developed erythema whereas only 18 erythema. Hyperpigmentation seen four after QSRL, LPDL. There no hypopigmentation. Conclusions LPDL delivered more effective than lentigines. Complications substantially less frequent addition technique may allow “vascular” pulsed treating variety pigmented lesions. Lasers Surg. Med. 38:94–97, 2006. © 2005 Wiley-Liss, Inc.