Integrated cooling-vacuum-assisted non-fractional 1540-nm erbium:glass laser: A new modality for the simultaneous effective treatment of acne lesions and scars

Introduction: Acne vulgaris is a common skin disorder with a significant impact on patients' quality of life. There is currently no treatment designated to treat acne lesions and scars concurrently. However, mid-infrared lasers may promote neocollagenesis within atrophic scars, while exerting a beneficial effect on acne lesions. Objectives: To determine the safety and efficacy of an integrated cooling-vacuum-assisted non-fractional 1540-nm Erbium:Glass laser for the treatment of acne lesions and scars. Patients and Methods: Twenty-two patients (8 male, 14 female) with mild-to-moderate acne and moderate-to-severe acne scars were included. Patients were treated using a non-fractional 1540-nm Er:Glass laser (Harmony XL^™, Alma Lasers Ltd.). Acne lesions and scars were exposed to 3-4 stacked pulses emitted at a rate of 3Hz for up to two passes per treatment session (spot size, 4 mm; fluence, 400-600 mJ/pulse), receiving overall 3-7 treatments with 2-3-week intervals. Patients were followed-up one and three months following their last treatment. Clinical evaluation including (i) overall aesthetic appearance, (ii) acne lesions, and (iii) acne scars, assessed independently by two dermatologists and graded on a scale of 0 (exacerbation) to 4 (76-100 percent improvement); and (iv) pain perception, adverse effects and patients’ satisfaction. Results: All but one patient completed treatment and follow-up and had moderate-to-significant improvement in all outcomes (overall aesthetic appearance, mean 3.9 [1 month] and 3.75 [3 month] improvement; acne lesions, 3.5 [1 month] and 2.3 [3 month] improve-tion was 4.2. ment; _Conclusion: scarring _{Cooling-vacuum-assisted} 4 [1 month] and 4.2 [3 month] _{1540 nm} improvement). _{Do laser} is _{aNot safe} Pain _and and _effective adverse _{Copy modality} effects were _{for the} mild _simultaneous and transient. _treatment Patients' _of mean _acne satisfac- _lesions and scars.