Gaseous and Particulate Content of Laser Hair Removal Plume

Potentially harmful chemicals are released when tissues are vaporised. Laser hair removal (LHR) causes heating and often vaporisation of hairs, producing both a signature malodorous plume and visible particulates. This study characterised the chemical composition and quantified the ultrafine particle content of the plume generated during LHR. In the laser centre of a large academic hospital, discarded terminal hairs from the trunk and extremities were collected from 2 adult volunteers. The hair samples were sealed in glass gas chromatography chambers and treated with a laser. The laser plume was analysed by gas chromatography-mass spectrometry (GC-MS). During LHR treatment, two 6-L negative pressure canisters were used to capture 30 seconds of laser plume, and a portable condensation particle counter was used to measure ultrafine particulates (<1 µm). Ultrafine particle concentrations were measured within the treatment room, within the waiting room, and outside the building. The chemical content of the laser plume was analysed with GC-MS and screened for aerosolised toxins using Environmental Protection Agency-certified methods. The ambient concentration of ultrafine particles during LHR was measured by condensation particle counters. Analysis with GC-MS identified 377 chemical compounds. Sixty-two of these compounds, of which 13 are known or suspected carcinogens and more than 20 are known environmental toxins, exhibited strong absorption peaks. During LHR, the portable condensation particle counters documented an 8-fold increase compared with the ambient room baseline level of ultrafine particle concentrations (ambient room baseline, 15?300 particles per cubic centimetre [fusion_builder_container hundred_percent="yes" overflow="visible"][fusion_builder_row][fusion_builder_column type="1_1" background_position="left top" background_color="" border_size="" border_color="" border_style="solid" spacing="yes" background_image="" background_repeat="no-repeat" padding="" margin_top="0px" margin_bottom="0px" class="" id="" animation_type="" animation_speed="0.3" animation_direction="left" hide_on_mobile="no" center_content="no" min_height="none"][ppc]; LHR with smoke evacuator, 129?376 ppc), even when a smoke evacuator was in close proximity (5.0 cm) to the procedure site. When the smoke evacuator was turned off for 30 seconds, there was a more than 26-fold increase in particulate count compared with ambient baseline levels (ambient baseline, 15?300 ppc; LHR without smoke evacuator for 30 seconds, 435?888 ppc). The authors concluded that these findings establish the concern that the burning-hair plume often present during LHR should be considered a biohazard, warranting the use of smoke evacuators, good ventilation, and respiratory protection, especially for health care workers with prolonged exposure to LHR plume. Authors: Chuang GS, Farinelli W, Christiani DC, Herrick RF, Lee NC, Avram MM. ;Full Source: JAMA Dermatology. 2016 Jul 6. doi: 10.1001/jamadermatol.2016.2097. [Epub ahead of print] ;[/fusion_builder_column][/fusion_builder_row][/fusion_builder_container]