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Effect of upper strap downward displacement on N95 filtering facepiece respirator fit factors: a pilot study.

Authors
Roberge-RJ; Palmiero-AJ; Liu-Y; Kim-J-H; Zhuang-Z
Source
J Occup Environ Hyg 2014 May; 11(5):338-341
NIOSHTIC No.
20043505
Abstract
Fifteen subjects underwent three replicates of quantitative respirator fit testing with N95 filtering facepiece respirators that were donned with the upper strap high on the occiput, as per the manufacturers' donning instructions. Each fit test was immediately followed by repeat fit testing with the upper strap downwardly displaced to the level of the ear sulcus in order to determine any change in fit factors that might occur with upper strap downward slippage. A total of 35/45 (78%) initial fit tests had a passing score (fit factor >/ =100) with the top strap high on the occiput and 33/35 (94%) of these passed subsequent fit testing after the top strap was displaced downward to the ear sulcus. Geometric mean fit factors for the initial passed fit tests, and following downward strap displacement, were 217 + / - 1.6 and 207 + / - 1.9, respectively (p = 0.64). Downward displacement of the top strap did not significantly impact fit factors of N95 FFRs that had previously passed fit testing.
Keywords
Respirators; Respiratory-equipment; Personal-protective-equipment; Quality-control; Quantitative-analysis; Air-purifying-respirators; Face-masks; Laboratory-testing; Anthropometry; Equipment-design; Equipment-reliability; Testing-equipment; Humans; Performance-capability; Author Keywords: displacement; fit factors; N95 filtering facepiece respirators; top strap
Contact
Raymond J. Roberge, MD, MPH, National Institute for Occupational Safety and Health, National Personal Protective Technology Laboratory, 626 Cochrans Mill Road, P.O. Box 18070, Pittsburgh, PA 15236, USA
CODEN
JOEHA2
Publication Date
20140501
Document Type
Journal Article
Email Address
dtn0@cdc.gov
Fiscal Year
2014
NTIS Accession No.
NTIS Price
Identifying No.
M122013
Issue of Publication
5
ISSN
1545-9624
NIOSH Division
NPPTL
Priority Area
Healthcare and Social Assistance
Source Name
Journal of Occupational and Environmental Hygiene
State
PA
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