Study on the efficacy and safety of a high-power triple wavelength diode laser (810, 940, 1060 nm) for removing fine and less pigmented facial hair on Asian skin.

INTRODUCTION: Performing laser hair removal treatments on dark skin is limited by the quantity of melanin within the skin. To minimize side effects, lower values of fluence are selected when using standard 755 or 810 nm diode lasers. However, this approach may limit the effectiveness of the procedure, particularly when treating areas with thin and less pigmented hair, which is often the case in facial regions. To improve results, high-power triple wavelength diode lasers can be used. This study aims to assess the efficacy, safety, and comfort of treatments that remove facial hair with a high-power triple wavelength diode laser (810, 940, and 1060 nm) in static mode on Asian patients with thin and less pigmented hair. MATERIALS AND METHODS: A single-center retrospective cohort study was carried out using a high-power triple wavelength diode laser (810, 940, and 1060 nm), with a 2.7 cm2 spot size, on faces with thin and less pigmented hair. The study comprised 23 subjects with Fitzpatrick skin types IV and V. Effectiveness was measured by counting the hairs that appeared in high-resolution photos taken prior to and following the procedure, in addition to the Global Aesthetic Improvement Scale (GAIS). Furthermore, mathematical 3D simulations were created on the COMSOL Multiphysics® software to allow for comparisons to be made with regard to thermal damage sustained by the hair follicles and epidermal heating. Assessments were also made in relation to side effects. RESULTS: An average of 66% hair reduction was observed. Patient satisfaction was between 4 and 5 points on the GAIS scale, indicating that the treatment was very well received and tolerated. Adverse side effects were not observed. CONCLUSION: It can be concluded that the use of a high-power triple wavelength diode laser (810, 940, and 1060 nm) is safe and effective for the treatment of very fine and less pigmented facial hair on Asian skin. Furthermore, a triple wavelength (810, 940, and 1060 nm) laser is absorbed less by the melanin in the skin, enabling the use of higher fluences in stamping mode, with greater efficacy and safety for darker skin.

Cryolipolysis for fat reduction using Cooltech® Define technology: A large-sample retrospective clinical study.

BACKGROUND: Cryolipolysis is a noninvasive technique for localized fat reduction, which induces selective apoptosis of the adipocytes using controlled exposure to intense cold. During the past 10 years, this technique has been shown to be safe and effective and its application has significantly increased. In this context, Cooltech® devices have been widely used around the world. AIMS: The purpose of this retrospective study was to evaluate the efficacy and safety of the removal of localized fatty tissue in different body areas using the new Cooltech® Define controlled cooling system. METHODS: This single-center study was carried out on 287 patients, both female and male, treated with Cooltech® Define on different body areas for a total of 1118 procedures. Follow-up evaluations were conducted to estimate efficacy and safety. Efficacy was evaluated through plicometry and photographs. Side effects were also reported. RESULTS: Fold thickness showed a significant reduction (-69.91 ± 12.55%) after cryolipolysis treatment (fold thickness before: 35.33 ± 8.41 mm; fold thickness after: 10.69 ± 5.27 mm). Few side effects were reported, they included posttreatment pain (1.70%) and one case of paradoxical adipose hyperplasia (0.09%). CONCLUSION: The Cooltech® Define cryolipolysis device is a safe, effective, and well-tolerated nonsurgical procedure for reducing localized fat.

Use of high-power diode laser at 1060 nm for the treatment of vascular lesions.

The use of 1060-nm wavelength light emitted from a high-power diode laser is a novel method for the removal of vascular lesions. Two Caucasian women with Fitzpatrick skin phototype II, who had various vascular lesions, were treated with a 1060-nm high-power diode laser, applying a fluence of 120 J/cm2 and a single pulse duration of 74 milliseconds. Immediate results were that the cherry angiomas became dark and a scab was formed (that remitted 2 weeks after treatment); the telangiectasias and venulectasias disappeared immediately. This technology has reported effective and safe results for removing different types of vascular lesions in the two patients treated. Side effects were those expected for this technique.