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Modeled occupational exposures to gas-phase medical laser generated air contaminants.

Authors
Lippert-JF; Lacey-SE; Jones-RM
Source
J Occup Environ Hyg 2014 Nov; 11(11):722-727
NIOSHTIC No.
20044164
Abstract
Exposure monitoring data indicate the potential for substantive exposure to laser generated air contaminants (LGAC), however the diversity of medical lasers and their applications limit generalization from direct workplace monitoring. Emission rates of seven previously reported gas-phase constituents of medical laser generated air contaminants (LGAC) were determined experimentally and used in a semi-empirical two-zone model to estimate a range of plausible occupational exposures to healthcare staff. Single source emission rates were generated in an emission chamber as a one-compartment mass balance model at steady state. Clinical facility parameters such as room size and ventilation rate were based on standard ventilation and environmental conditions required for a laser surgical facility in compliance with regulatory agencies. All input variables in the model including point source emission rates were varied over an appropriate distribution in a Monte Carlo simulation to generate a range of time weighted average concentrations in the near and far field zones of the room in a conservative approach inclusive of all contributing factors to inform future predictive models. The concentrations were assessed for risk and the highest values were shown to be at least three orders of magnitude lower than the relevant occupational exposure limits. Estimated values do not appear to present a significant exposure hazard within the conditions of our emission rate estimates.
Keywords
Exposure-levels; Monitors; Air-contamination; Lasers; Emission-sources; Models; Health-care-personnel; Medical-personnel; Author Keywords: Medical laser; laser generated air contaminants; LGAC; emission rates; two-zone model
Contact
Julia F. Lippert, 2121 W. Taylor, Chicago, Illinois 60612
CODEN
JOEHA2
Publication Date
20141101
Document Type
Journal Article
Email Address
julialippert@gmail.com
Funding Type
Grant
Fiscal Year
2015
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-T42-OH-008672; M042014
Issue of Publication
11
ISSN
1545-9624
Source Name
Journal of Occupational and Environmental Hygiene
State
IL; IN
Performing Organization
University of Illinois at Chicago
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