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Evaluation of the filtration performance of 21 N95 filtering face piece respirators after prolonged storage

BACKGROUND: Organizations are stockpiling respirators to prepare for an influenza pandemic. To understand better the effects of prolonged storage, this investigation evaluated the filtration efficiency of 21 different models of National Institute for Occupational Safety and Health (NIOSH)-certified...

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Autores principales: Viscusi, Dennis J., Bergman, Mike, Sinkule, Edward, Shaffer, Ronald E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Association for Professionals in Infection Control and Epidemiology, Inc. Published by Mosby, Inc. 2009
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7132679/
https://www.ncbi.nlm.nih.gov/pubmed/19188003
http://dx.doi.org/10.1016/j.ajic.2008.09.021
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author Viscusi, Dennis J.
Bergman, Mike
Sinkule, Edward
Shaffer, Ronald E.
author_facet Viscusi, Dennis J.
Bergman, Mike
Sinkule, Edward
Shaffer, Ronald E.
author_sort Viscusi, Dennis J.
collection PubMed
description BACKGROUND: Organizations are stockpiling respirators to prepare for an influenza pandemic. To understand better the effects of prolonged storage, this investigation evaluated the filtration efficiency of 21 different models of National Institute for Occupational Safety and Health (NIOSH)-certified disposable N95 filtering face piece respirators. These respirators had been stored in their original packaging for a period of at least 6 years in research laboratories and dry warehouse facilities, ranging in temperature between 15°C and 32°C and relative humidity between 20% and 80%. METHODS: Filter penetration was measured using an abbreviated version of the NIOSH respirator certification test incorporating a polydisperse sodium chloride aerosol at 85 L/min. RESULTS: Of the 21 respirator models tested, 19 models had both average penetration results of less than 5%. Mean initial penetration values ranged from 0.39% to 5.83%, whereas mean maximum penetration values ranged from 0.95% to 5.83%. There did not appear to be any correlation between the length of storage and failure to pass the filtration test. CONCLUSION: Results indicate that most N95 filtering face piece respirators stored for up to 10 years at warehouse conditions will likely have expected levels of filtration performance and that the degree of filtration efficiency degradation is likely model specific.
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spelling pubmed-71326792020-04-08 Evaluation of the filtration performance of 21 N95 filtering face piece respirators after prolonged storage Viscusi, Dennis J. Bergman, Mike Sinkule, Edward Shaffer, Ronald E. Am J Infect Control Article BACKGROUND: Organizations are stockpiling respirators to prepare for an influenza pandemic. To understand better the effects of prolonged storage, this investigation evaluated the filtration efficiency of 21 different models of National Institute for Occupational Safety and Health (NIOSH)-certified disposable N95 filtering face piece respirators. These respirators had been stored in their original packaging for a period of at least 6 years in research laboratories and dry warehouse facilities, ranging in temperature between 15°C and 32°C and relative humidity between 20% and 80%. METHODS: Filter penetration was measured using an abbreviated version of the NIOSH respirator certification test incorporating a polydisperse sodium chloride aerosol at 85 L/min. RESULTS: Of the 21 respirator models tested, 19 models had both average penetration results of less than 5%. Mean initial penetration values ranged from 0.39% to 5.83%, whereas mean maximum penetration values ranged from 0.95% to 5.83%. There did not appear to be any correlation between the length of storage and failure to pass the filtration test. CONCLUSION: Results indicate that most N95 filtering face piece respirators stored for up to 10 years at warehouse conditions will likely have expected levels of filtration performance and that the degree of filtration efficiency degradation is likely model specific. Association for Professionals in Infection Control and Epidemiology, Inc. Published by Mosby, Inc. 2009-06 2009-02-01 /pmc/articles/PMC7132679/ /pubmed/19188003 http://dx.doi.org/10.1016/j.ajic.2008.09.021 Text en Copyright © 2009 Association for Professionals in Infection Control and Epidemiology, Inc. Published by Mosby, Inc. All rights reserved. Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.
spellingShingle Article
Viscusi, Dennis J.
Bergman, Mike
Sinkule, Edward
Shaffer, Ronald E.
Evaluation of the filtration performance of 21 N95 filtering face piece respirators after prolonged storage
title Evaluation of the filtration performance of 21 N95 filtering face piece respirators after prolonged storage
title_full Evaluation of the filtration performance of 21 N95 filtering face piece respirators after prolonged storage
title_fullStr Evaluation of the filtration performance of 21 N95 filtering face piece respirators after prolonged storage
title_full_unstemmed Evaluation of the filtration performance of 21 N95 filtering face piece respirators after prolonged storage
title_short Evaluation of the filtration performance of 21 N95 filtering face piece respirators after prolonged storage
title_sort evaluation of the filtration performance of 21 n95 filtering face piece respirators after prolonged storage
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7132679/
https://www.ncbi.nlm.nih.gov/pubmed/19188003
http://dx.doi.org/10.1016/j.ajic.2008.09.021
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