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Flat fold and cup-shaped N95 filtering facepiece respirator face seal area and pressure determinations: a stereophotogrammetry study.

Authors
Niezgoda-G; Kim-J-H; Roberge-RJ; Benson-SM
Source
J Occup Environ Hyg 2013 Aug; 10(8):419-424
NIOSHTIC No.
20042819
Abstract
Twenty subjects underwent quantitative respirator fit testing with two styles (flat fold, cup-shaped) of N95 filtering facepiece respirators (N95 FFRs). Passing a fit test was followed by stereophotogrammetry to determine the face seal area and computation of seal pressure. There were significantly different seal pressures (p < 0.01) between standard size flat fold and cup-shaped N95 FFRs but no significant differences in face seal area. No significant differences were noted in fit factors, but more individuals passed fit testing wearing flat fold respirators. The ability of flat fold N95 FFRs, at lower seal pressures, to obtain similar fit factors as cup-shaped N95 FFR at higher seal pressures offers the possibility of enhanced facial comfort without a loss of protection. Stereophotogrammetry offers a relatively simple, non-invasive technology to evaluate various properties of N95 FFR fit.
Keywords
Respirators; Respiratory-equipment; Anthropometry; Face-masks; Face-shields; Quantitative-analysis; Air-purifying-respirators; Testing-equipment; Humans; Headgear; Leak-detectors; Leak-prevention; Pressure-testing; Measurement-equipment; Photometry; Author Keywords: face seal area; N95 filtering facepiece respirators; seal pressure; stereophotogrammetry
Contact
Raymond Roberge, National Personal Protective Technology Laboratory, National Institute for Occupational Safety and Health, 626 Cochrans Mill Road, Pittsburgh, PA 15236
CODEN
JOEHA2
Publication Date
20130801
Document Type
Journal Article
Email Address
dtn0@cdc.gov
Fiscal Year
2013
NTIS Accession No.
NTIS Price
Identifying No.
B20130718
Issue of Publication
8
ISSN
1545-9624
NIOSH Division
NPPTL
Priority Area
Manufacturing
Source Name
Journal of Occupational and Environmental Hygiene
State
PA
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