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http://conacyt.repositorioinstitucional.mx/jspui/handle/1000/8738| Applying Heat and Humidity using Stove Boiled Water for Decontamination of N95 Respirators in Low Resource Settings | |
| Siddharth Doshi Samhita Banavar Eliott Flaum Surendra Kulkarni Shailabh Kumar Tyler Chen Arnab Bhattacharya Manu Prakash | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| https://doi.org/10.1101/2020.05.28.20113209 | |
| https://www.medrxiv.org/content/10.1101/2020.05.28.20113209v3 | |
| Global shortages of N95 respirators have led to an urgent need of N95 decontamination and reuse methods that are scientifically validated and available world-wide. Although several large scale decontamination methods have been proposed (hydrogen peroxide vapor, UV-C); many of them are not applicable in remote and low-resource settings. Heat with humidity has been demonstrated as a promising decontamination approach, but care must be taken when implementing this method at a grassroots level. Here we present a simple, scalable method to provide controlled humidity and temperature for individual N95 respirators which is easily applicable in low-resource settings. N95 respirators were subjected to moist heat (>50% relative humidity, 65-80°C temperature) for over 30 minutes by placing them in a sealed container immersed in water that had been brought to a rolling boil and removed from heat, and then allowing the containers to sit for over 45 minutes. Filtration efficiency of 0.3-4.99um incense particles remained above 97% after 5 treatment cycles across all particle size sub-ranges. This method was then repeated at a higher ambient temperature and humidity in Mumbai, using standard utensils commonly found in South Asia. Similar temperatures and humidities were achieved and filtration efficiencies consistently remained above 94%. Higher temperatures (>70°C) and longer treatment times (>40 minutes) were obtained by insulating the outer vessel. This simple yet reliable method can be performed even without electricity access using any heat source to boil water, from open-flame stoves to solar heating, and provides a low-cost route for N95 decontamination globally applicable in resource-constrained settings. | |
| bioRxiv | |
| 22-09-2020 | |
| Preimpreso | |
| Inglés | |
| Público en general | |
| VIRUS RESPIRATORIOS | |
| Versión publicada | |
| publishedVersion - Versión publicada | |
| Aparece en las colecciones: | Materiales de Consulta y Comunicados Técnicos |
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| Fichero | Tamaño | Formato | |
|---|---|---|---|
| Applying Heat and Humidity using Stove Boiled Water for Decontamination of N95 Respirators in Low Resource Settings.pdf | 1.91 MB | Adobe PDF | Visualizar/Abrir |