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Surgical mask filter and fit performance.

Authors
Oberg-T; Brosseau-LM
Source
Am J Infect Control 2008 May; 36(4):276-282
NIOSHTIC No.
20033859
Abstract
BACKGROUND: Surgical masks have been used since the early 1900s to minimize infection of surgical wounds from wearer-generated bacteria. There is ongoing debate, however, whether surgical masks can meet the expectations of respiratory protection devices. The goal of this study was to evaluate the filter performance and facial fit of a sample of surgical masks. METHODS: Filter penetration was measured for at least 3 replicates of 9 surgical masks using monodisperse latex sphere aerosols (0.895, 2.0, and 3.1 microm) at 6 L/min and 0.075-microm sodium chloride particles at 84 L/min. Facial fit was measured on 20 subjects for the 5 masks with lowest particle penetration, using both qualitative and quantitative fit tests. RESULTS: Masks typically used in dental settings collected particles with significantly lower efficiency than those typically used in hospital settings. All subjects failed the unassisted qualitative fit test on the first exercise (normal breathing). Eighteen subjects failed the assisted qualitative fit tests; 60% failed on the first exercise. Quantitative fit factors ranged from 2.5 to 9.6. CONCLUSION: None of these surgical masks exhibited adequate filter performance and facial fit characteristics to be considered respiratory protection devices.
Keywords
Biohazards; Biological-factors; Biological-systems; Biological-transport; Health-care-personnel; Mathematical-models; Medical-personnel; Particle-aerodynamics; Particulate-sampling-methods; Particulates; Personal-protection; Protective-measures; Quantitative-analysis; Qualitative-analysis; Statistical-analysis; Work-environment
Contact
Lisa M. Brosseau, ScD, University of Minnesota, School of Public Health, Division of Environmental Health Sciences, MMC 807, 420 Delaware St. SE, Minneapolis, MN 55455
CODEN
AJICDC
Publication Date
20080501
Document Type
Journal Article
Email Address
brosseau@umn.edu
Funding Type
Grant
Fiscal Year
2008
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-T42-OH-008434
Issue of Publication
4
ISSN
0196-6553
Source Name
American Journal of Infection Control
State
MN
Performing Organization
University of Minnesota Twin Cities
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