Airborne Particulate Concentration During Laser Hair Removal: A Comparison Between Cold Sapphire With Aqueous Gel and Cryogen Skin Cooling

Background: High concentrations of sub-micron nanoparticles have been shown to be released during laser hair removal (LHR) procedures. These emissions pose a potential biohazard to healthcare workers that have prolonged exposure to LHR plume. Objective: We sought to demonstrate that cold sapphire skin cooling done in contact mode might suppress plume dispersion during LHR. Methods: A total of 11 patients were recruited for laser hair removal. They were treated on the legs and axilla with a 755 or 1064nm millisecond-domain laser equipped with either (i) cryogen spray (CSC); (ii) refrigerated air (RA); or (iii) contact cooling with sapphire (CC). Concentration of ultrafine nanoparticles < 1mm were measured just before and duringLHRwith the three respective cooling methods. Results: For contact cooling (CC), counts remained at baseline levels, below 3,500 parts per cubic centimeter (ppc) for all treatments. In contrast, the CSC system produced large levels of plume, peaking at times to over 400,000 ppc. The CA cooled system produced intermediate levels of plume, about 35,000 ppc (or about 10 x baseline). Conclusions: Cold Sapphire Skin cooling with gel suppresses plume during laser hair removal, potentially eliminating the need for smoke evacuators, custom ventilation systems, and respirators during LHR. Lasers Surg. Med. 50: 280-283, 2018. (c) 2017 Wiley Periodicals, Inc.