About: An accessible method for screening aerosol filtration identifies poor-performing commercial masks and respirators

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An Entity of Type : schema:ScholarlyArticle, within Data Space : wasabi.inria.fr associated with source document(s)

Attributes	Values
type	Academic Article research paper schema:ScholarlyArticle
isDefinedBy	Covid-on-the-Web dataset
title	An accessible method for screening aerosol filtration identifies poor-performing commercial masks and respirators
Creator	Peccia, Jordan Godri Pollitt, Krystal Bergemann, Reza Lattanza, Lisa Schilling, Katherine Wilen, Lawrence Bernardo, • Colby Buehler, • Drew, • Gentner, R Luis, • Medina, • Perez-Lorenzo, J Wilczynski, •
source	Medline; PMC
abstract	BACKGROUND: The COVID-19 pandemic has presented an acute shortage of regulation-tested masks. Many of the alternatives available to hospitals have not been certified, leaving uncertainty about their ability to properly protect healthcare workers from SARS-CoV-2 transmission. OBJECTIVE: For situations where regulatory methods are not accessible, we present experimental methods to evaluate mask filtration and breathability quickly via cost-effective approaches (e.g., ~$2000 USD) that could be replicated in communities of need without extensive infrastructure. We demonstrate the need for screening by evaluating an existing diverse inventory of masks/respirators from a local hospital. METHODS: Two experimental approaches are presented to examine both aerosol filtration and flow impedance (i.e., breathability). For one of the approaches (“quick assessment”), screening for appropriate filtration could be performed under 10 min per mask, on average. Mask fit tests were conducted in tandem but are not the focus of this study. RESULTS: Tests conducted of 47 nonregulation masks reveal variable performance. A number of commercially available masks in hospital inventories perform similarly to N95 masks for aerosol filtration of 0.2 μm and above, but there is a range of masks with relatively lower filtration efficiencies (e.g., <90%) and a subset with poorer filtration (e.g., <70%). All masks functioned acceptably for breathability, and impedance was not correlated with filtration efficiency. SIGNIFICANCE: With simplified tests, organizations with mask/respirator shortages and uncertain inventories can make informed decisions about use and procurement.
has issue date	2020-08-06(xsd:dateTime)
bibo:doi	10.1038/s41370-020-0258-7
bibo:pmid	32764709
has license	no-cc
sha1sum (hex)	b79d46ec0f6a33ae8d6359ce39a11bd68d13a6f6
schema:url	https://doi.org/10.1038/s41370-020-0258-7
resource representing a document's title	An accessible method for screening aerosol filtration identifies poor-performing commercial masks and respirators
has PubMed Central identifier	PMC7406964
has PubMed identifier	32764709
schema:publication	J Expo Sci Environ Epidemiol
resource representing a document's body	covid:b79d46ec0f6a33ae8d6359ce39a11bd68d13a6f6#body_text
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