Document Detail

Flat fold and cup-shaped n95 filtering facepiece respirator face seal area and pressure determinations: a stereophotogrammetry study.
MedLine Citation:
PMID:  23767820     Owner:  NLM     Status:  In-Data-Review    
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.
George Niezgoda; Jung-Hyun Kim; Raymond J Roberge; Stacey M Benson
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of occupational and environmental hygiene     Volume:  10     ISSN:  1545-9632     ISO Abbreviation:  J Occup Environ Hyg     Publication Date:  2013 Aug 
Date Detail:
Created Date:  2013-06-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101189458     Medline TA:  J Occup Environ Hyg     Country:  England    
Other Details:
Languages:  eng     Pagination:  419-24     Citation Subset:  IM    
a National Personal Protective Technology Laboratory , National Institute for Occupational Safety and Health , Pittsburgh , Pennsylvania.
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