Please use this identifier to cite or link to this item: https://observatorio.fm.usp.br/handle/OPI/40687
Title: Decontamination and re-use of surgical masks and respirators during the COVID-19 pandemic
Authors: CORTES, Marina FarrelESPINOZA, Evelyn Patricia SanchezNOGUERA, Saidy Liceth VasconezSILVA, Aline AlvesMEDEIROS, Marion Elke Sielfeld Araya deBOAS, Lucy Santos VillasFERREIRA, Noely EvangelistaTOZETTO-MENDOZA, Tania ReginaMORAIS, Fernando GoncalvesQUEIROZ, Rayana Santiago dePROENCA, Adriana Coracini Tonacio deGUIMARAES, ThaisGUEDES, Ana RubiaLETAIF, Leila Suemi HarimaMONTAL, Amanda CardosoMENDES-CORREA, Maria CassiaJOHN, Vanderley M.LEVIN, Anna S.COSTA, Silvia Figueiredo
Citation: INTERNATIONAL JOURNAL OF INFECTIOUS DISEASES, v.104, p.320-328, 2021
Abstract: Objectives: The coronavirus disease 2019 pandemic increased global demand for personal protective equipment (PPE) and resulted in shortages. The study evaluated the re-use of surgical masks and respirators by analysing their performance and safety before and after reprocessing using the following methods: oven, thermal drying, autoclave, and hydrogen peroxide plasma vapour. Methods: In total, 45 surgical masks and 69 respirators were decontaminated. Visual integrity, air permeability, burst resistance, pressure differential and particulate filtration efficiency of new and decontaminated surgical masks and respirators were evaluated. In addition, 14 used respirators were analysed after work shifts before and after decontamination using reverse transcription polymerase chain reaction (RT-PCR) and viral culturing. Finally, reprocessed respirators were evaluated by users in terms of functionality and comfort. Results: Oven decontamination (75 degrees C for 45 min) was found to be the simplest decontamination method. Physical and filtration assays indicated that all reprocessing methods were safe after one cycle. Oven decontamination maintained the characteristics of surgical masks and respirators for at least five reprocessing cycles. Viral RNA was detected by RT-PCR in two of the 14 used respirators. Four respirators submitted to viral culture were PCR-negative and culture-negative. Reprocessed respirators used in work shifts were evaluated positively by users, even after three decontamination cycles. Conclusion: Oven decontamination is a safe method for reprocessing surgical masks and respirators for at least five cycles, and is feasible in the hospital setting. (C) 2020 Published by Elsevier Ltd on behalf of International Society for Infectious Diseases.
Appears in Collections:

Artigos e Materiais de Revistas Científicas - COVID-19
COVID-19

Artigos e Materiais de Revistas Científicas - FM/MIP
Departamento de Moléstias Infecciosas e Parasitárias - FM/MIP

Artigos e Materiais de Revistas Científicas - HC/ICHC
Instituto Central - HC/ICHC

Artigos e Materiais de Revistas Científicas - HC/IPq
Instituto de Psiquiatria - HC/IPq

Artigos e Materiais de Revistas Científicas - IMT
Instituto de Medicina Tropical - IMT

Artigos e Materiais de Revistas Científicas - LIM/49
LIM/49 - Laboratório de Protozoologia

Artigos e Materiais de Revistas Científicas - LIM/52
LIM/52 - Laboratório de Virologia

Artigos e Materiais de Revistas Científicas - ODS/03
ODS/03 - Saúde e bem-estar


Files in This Item:
File Description SizeFormat 
art_CORTES_Decontamination_and_reuse_of_surgical_masks_and_respirators_2021.PDFpublishedVersion (English)1.7 MBAdobe PDFThumbnail
View/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.