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Article

In-House Filtration Efficiency Assessment of Vapor Hydrogen Peroxide Decontaminated Filtering Facepiece Respirators (FFRs)

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Radiation Biology Section, Biomedical Physics Department, King Faisal Specialist Hospital and Research Centre (KFSH&RC), Riyadh 11211, Saudi Arabia
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Emerging Technology Unit, Biomedical Physics Department, King Faisal Specialist Hospital and Research Centre (KFSH&RC), Riyadh 11211, Saudi Arabia
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Perioperative Services Department, King Faisal Specialist Hospital and Research Centre (KFSH&RC), Riyadh 11211, Saudi Arabia
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Protocol Service Nursing Department, King Faisal Specialist Hospital and Research Centre (KFSH&RC), Riyadh 11211, Saudi Arabia
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Quality Management Department, King Faisal Specialist Hospital and Research Centre (KFSH&RC), Riyadh 11211, Saudi Arabia
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Infection Control and Hospital Epidemiology Department, King Faisal Specialist Hospital and Research Centre (KFSH&RC), Riyadh 11211, Saudi Arabia
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General Corporate Consultancy Department, King Faisal Specialist Hospital and Research Centre (KFSH&RC), Riyadh 11211, Saudi Arabia
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Author to whom correspondence should be addressed.
Academic Editors: Małgorzata Okrasa and Alesia Ferguson
Int. J. Environ. Res. Public Health 2021, 18(13), 7169; https://doi.org/10.3390/ijerph18137169
Received: 25 April 2021 / Revised: 28 June 2021 / Accepted: 1 July 2021 / Published: 4 July 2021
(This article belongs to the Special Issue Occupational Safety and Personal Protective Equipment)
To cope with the shortage of filtering facepiece respirators (FFRs) caused by the coronavirus disease (COVID-19), healthcare institutions have been forced to reuse FFRs using different decontamination methods, including vapor hydrogen peroxide (VHP). However, most healthcare institutions still struggle with evaluating the effect of VHP on filtration efficiency (FE) of the decontaminated FFRs. We developed a low-cost in-house FE assessment using a novel 3D-printed air duct. Furthermore, we assessed the FE of seven types of FFRs. Following 10 VHP cycles, we evaluated the FE of KN95 and 3M-N95 masks. The 3M-N95 and Benehal-N95 masks showed significant lower FE (80.4–91.8%) at fine particle sizes (0.3–1 µm) compared to other FFRs (FE ≥ 98.1%, p < 0.05). Following 10 VHP cycles, the FE of KN95 masks was almost stable (FE stability > 99.1%) for all particle sizes, while 3M-N95 masks were stable only at 2 and 5 µm (FE stability > 98.0%). Statistically, FE stability of 3M-N95 masks at 0.3, 0.5, and 0.7 µm was significantly lower (p ≤ 0.006) than 2 and 5 µm. The in-house FE assessment may be used as an emergency procedure to validate the decontaminated FFRs, as well as a screening option for production control of FFRs. Following VHP cycles, both masks showed high stability at 5 µm, the size of the most suspected droplets implicated in COVID-19 transmission. View Full-Text
Keywords: COVID-19; N95 masks; KN95 masks; vapor hydrogen peroxide; FFRs; decontamination; filtration efficiency COVID-19; N95 masks; KN95 masks; vapor hydrogen peroxide; FFRs; decontamination; filtration efficiency
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MDPI and ACS Style

Al-Hadyan, K.; Alsbeih, G.; Nobah, A.; Lindstrom, J.; Falatah, S.; Faran, N.; Al-Ghamdi, S.; Moftah, B.; Alhmaid, R. In-House Filtration Efficiency Assessment of Vapor Hydrogen Peroxide Decontaminated Filtering Facepiece Respirators (FFRs). Int. J. Environ. Res. Public Health 2021, 18, 7169. https://doi.org/10.3390/ijerph18137169

AMA Style

Al-Hadyan K, Alsbeih G, Nobah A, Lindstrom J, Falatah S, Faran N, Al-Ghamdi S, Moftah B, Alhmaid R. In-House Filtration Efficiency Assessment of Vapor Hydrogen Peroxide Decontaminated Filtering Facepiece Respirators (FFRs). International Journal of Environmental Research and Public Health. 2021; 18(13):7169. https://doi.org/10.3390/ijerph18137169

Chicago/Turabian Style

Al-Hadyan, Khaled, Ghazi Alsbeih, Ahmad Nobah, Jeffrey Lindstrom, Sawsan Falatah, Nawarh Faran, Salem Al-Ghamdi, Belal Moftah, and Rashed Alhmaid. 2021. "In-House Filtration Efficiency Assessment of Vapor Hydrogen Peroxide Decontaminated Filtering Facepiece Respirators (FFRs)" International Journal of Environmental Research and Public Health 18, no. 13: 7169. https://doi.org/10.3390/ijerph18137169

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