About: Performance of an N95 Filtering Facepiece Particulate Respirator and a Surgical Mask During Human Breathing: Two Pathways for Particle Penetration

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About: Performance of an N95 Filtering Facepiece Particulate Respirator and a Surgical Mask During Human Breathing: Two Pathways for Particle Penetration Goto Sponge NotDistinct Permalink

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
has title	Performance of an N95 Filtering Facepiece Particulate Respirator and a Surgical Mask During Human Breathing: Two Pathways for Particle Penetration
Creator	Reponen, Tiina Grinshpun, Sergey Eninger, Robert Haruta, Hiroki Lee, Shu-An Mckay, Roy
Source	PMC
abstract	The protection level offered by filtering facepiece particulate respirators and face masks is defined by the percentage of ambient particles penetrating inside the protection device. There are two penetration pathways: (1) through the faceseal leakage, and the (2) filter medium. This study aimed at differentiating the contributions of these two pathways for particles in the size range of 0.03–1 μm under actual breathing conditions. One N95 filtering facepiece respirator and one surgical mask commonly used in health care environments were tested on 25 subjects (matching the latest National Institute for Occupational Safety and Health fit testing panel) as the subjects performed conventional fit test exercises. The respirator and the mask were also tested with breathing manikins that precisely mimicked the prerecorded breathing patterns of the tested subjects. The penetration data obtained in the human subject- and manikin-based tests were compared for different particle sizes and breathing patterns. Overall, 5250 particle size- and exercise-specific penetration values were determined. For each value, the faceseal leakage-to-filter ratio was calculated to quantify the relative contributions of the two penetration pathways. The number of particles penetrating through the faceseal leakage of the tested respirator/mask far exceeded the number of those penetrating through the filter medium. For the N95 respirator, the excess was (on average) by an order of magnitude and significantly increased with an increase in particle size (p < 0.001): ∼7-fold greater for 0.04 μm, ∼10-fold for 0.1 μm, and ∼20-fold for 1 μm. For the surgical mask, the faceseal leakage-to-filter ratio ranged from 4.8 to 5.8 and was not significantly affected by the particle size for the tested submicrometer fraction. Facial/body movement had a pronounced effect on the relative contribution of the two penetration pathways. Breathing intensity and facial dimensions showed some (although limited) influence. Because most of the penetrated particles entered through the faceseal, the priority in respirator/mask development should be shifted from improving the efficiency of the filter medium to establishing a better fit that would eliminate or minimize faceseal leakage.
has issue date	2010-07-22(xsd:dateTime)
bibo:doi	10.1080/15459620903120086
bibo:pmid	19598054
has license	no-cc
sha1sum (hex)	9c2c75ca28fe06220b98a20bc59c84c4bb028e78
schema:url	https://doi.org/10.1080/15459620903120086
resource representing a document's title	Performance of an N95 Filtering Facepiece Particulate Respirator and a Surgical Mask During Human Breathing: Two Pathways for Particle Penetration
has PubMed Central identifier	PMC7196699
has PubMed identifier	19598054
schema:publication	J Occup Environ Hyg
resource representing a document's body	covid:9c2c75ca28fe06220b98a20bc59c84c4bb028e78#body_text
is schema:about of	named entity 'PERFORMED' named entity 'MAGNITUDE' named entity 'RATIO' named entity 'N95' named entity 'respirator' named entity 'particle size' named entity 'order of magnitude' named entity 'fit testing' named entity 'Surgical Mask' named entity 'surgical mask' named entity 'surgical masks' named entity 'RPD' named entity 'surgical mask' named entity 'surgical mask' named entity 'aerosol' named entity 'particle size' named entity 'surgical mask' named entity 'particle size' named entity 'respirator' named entity 'respirator' named entity 'particle size' named entity 'N95 respirators' named entity 'particle size' named entity 'respirator' named entity 'respiration' named entity 'RPD' named entity 'p-values' named entity 'aerosol particles' named entity 'respirator' named entity 'surgical mask' named entity 'Hispanic American' named entity 'particle size' named entity 'particle size' named entity 'aerosol particles' named entity 'respirator' named entity 'surgical mask' named entity 'p-values' named entity 'flow control valve' named entity 'N95 respirator' named entity 'health care' named entity 'NIOSH' named entity 'informed consent' named entity 'p-value' named entity 'regression analysis' named entity 'filter media' named entity '5.8' named entity 'SPSS' named entity 'Microsoft Office Excel' named entity 'aerosol' named entity 'respirator' named entity 'statistically significant' named entity 'breathing patterns' named entity 'order of magnitude' named entity 'N95' named entity 'NIOSH' named entity 'particulate respirators' named entity 'statistical significance' named entity 'particle size' named entity 'OSHA' named entity 'filter media' named entity 'particle size' named entity 'MPPS' named entity 'surgical mask' named entity 'N95 respirator' named entity 'fit testing' named entity 'fit test' named entity 'statistically significant' named entity 'respirator' named entity 'statistically significant' named entity 'statistical analysis' named entity 'N95' named entity 'paired t-test' named entity 'respirator' named entity 'surgical masks' named entity 'surgical mask' named entity 'NaCl'

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