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Controlled Heat and Humidity-Based Treatment for the Reuse of Personal Protective Equipment: A Pragmatic Proof-of-Concept to Address the Mass Shortage of Surgical Masks and N95/FFP2 Respirators and to Prevent the SARS-CoV2 Transmission

Louis Bernard 1, 2, * Guillaume Desoubeaux 2, 3, 4 Elsa Bodier-Montagutelli 2, 4 Jeoffrey Pardessus 2, 4 Déborah Brea 2, 4 Laurine Allimonnier 2, 4 Sébastien Eymieux 2, 5, 6 Pierre-Ivan Raynal 2, 5 Virginie Vasseur 2, 4 Laurent Vecellio 2, 4 Ludovic Mathé Antoine Guillon 2, 4, 7 Philippe Lanotte 2, 8, 9 Jérémie Pourchez 10 Paul Verhoeven 11, 12 Stéphane Esnouf 13 Muriel Ferry 13 Nicolas Eterradossi 14 Yannick Blanchard 14 Paul Brown 14 Philippe Roingeard 2, 5, 6 Jean-Pierre Alcaraz 15 Philippe Cinquin 15, 16 Mustapha Si-Tahar 2, 4 Nathalie Heuzé-Vourc'H 2, 4, *
Abstract : Background: The coronavirus infectious disease-2019 (COVID-19) pandemic has led to an unprecedented shortage of healthcare resources, primarily personal protective equipment like surgical masks, and N95/filtering face piece type 2 (FFP2) respirators.Objective: Reuse of surgical masks and N95/FFP2 respirators may circumvent the supply chain constraints and thus overcome mass shortage. Methods, design, setting, and measurement: Herein, we tested the effects of dry- and moist-air controlled heating treatment on structure and chemical integrity, decontamination yield, and filtration performance of surgical masks and FFP2 respirators.Results: We found that treatment in a climate chamber at 70 degrees C during 1 h with 75% humidity rate was adequate for enabling substantial decontamination of both respiratory viruses, oropharyngeal bacteria, and model animal coronaviuses, while maintaining a satisfying filtering capacity.Limitations: Further studies are now required to confirm the feasibility of the whole process during routine practice.Conclusion: Our findings provide compelling evidence for the recycling of pre-used surgical masks and N95/FFP2 respirators in case of imminent mass shortfall.
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https://hal.inrae.fr/hal-03036466
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Submitted on : Wednesday, December 2, 2020 - 4:35:36 PM
Last modification on : Monday, May 31, 2021 - 1:18:03 PM

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Louis Bernard, Guillaume Desoubeaux, Elsa Bodier-Montagutelli, Jeoffrey Pardessus, Déborah Brea, et al.. Controlled Heat and Humidity-Based Treatment for the Reuse of Personal Protective Equipment: A Pragmatic Proof-of-Concept to Address the Mass Shortage of Surgical Masks and N95/FFP2 Respirators and to Prevent the SARS-CoV2 Transmission. Frontiers in Medicine, Frontiers media, 2020, 7, 9 p. ⟨10.3389/fmed.2020.584036⟩. ⟨hal-03036466⟩

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