Heat treatment for reuse of disposable respirators during Covid-19 pandemic: Is filtration and fit adversely affected?
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Abstract
A number of methods for decontaminating disposable filtering face piece respirators have been explored for use in health care settings during epidemics where respirators are in short supply, such as the current Covid-19 pandemic. Heating to temperatures above 65°C has been shown to successfully inactivate the SARS-CoV-2 virus on various surfaces. Ovens or similar heating devices are likely already widely available in hospitals globally. We did a quantitative fit test on nine models of FFP2 and FFP3 respirators before and after heat treatment in an oven. These included both flat fold and moulded cup styles. All passed the initial fit test, and all but two passed the post-treatment fit test. This study demonstrates that FFP respirators can still retain both filtration efficiency and fit after wear and heat treatment, but that it is necessary to understand the probability for failure of fit after decontamination. Heat shows promise as a simple and effective way of treating FFP respirators. Further evaluation of longer-term wear and disinfection effectiveness of heat treatment should be done before widespread use.
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SciScore for 10.1101/2020.04.22.20074989: (What is this?)
Please note, not all rigor criteria are appropriate for all manuscripts.
Table 1: Rigor
NIH rigor criteria are not applicable to paper type.Table 2: Resources
No key resources detected.
Results from OddPub: We did not detect open data. We also did not detect open code. Researchers are encouraged to share open data when possible (see Nature blog).
Results from LimitationRecognizer: An explicit section about the limitations of the techniques employed in this study was not found. We encourage authors to address study limitations.Results from TrialIdentifier: No clinical trial numbers were referenced.
Results from Barzooka: We did not find any issues relating to the usage of bar graphs.
Results from JetFighter: We did not find any issues relating to colormaps.
Results from rtransparent:- Thank…
SciScore for 10.1101/2020.04.22.20074989: (What is this?)
Please note, not all rigor criteria are appropriate for all manuscripts.
Table 1: Rigor
NIH rigor criteria are not applicable to paper type.Table 2: Resources
No key resources detected.
Results from OddPub: We did not detect open data. We also did not detect open code. Researchers are encouraged to share open data when possible (see Nature blog).
Results from LimitationRecognizer: An explicit section about the limitations of the techniques employed in this study was not found. We encourage authors to address study limitations.Results from TrialIdentifier: No clinical trial numbers were referenced.
Results from Barzooka: We did not find any issues relating to the usage of bar graphs.
Results from JetFighter: We did not find any issues relating to colormaps.
Results from rtransparent:- Thank you for including a conflict of interest statement. Authors are encouraged to include this statement when submitting to a journal.
- Thank you for including a funding statement. Authors are encouraged to include this statement when submitting to a journal.
- No protocol registration statement was detected.
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