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Homemade masks in the COVID-19 pandemic: recommendations, physical characteristics, disinfection and efficacy of use / Mascarillas caseras en la pandemia de COVID-19: recomendaciones, características físicas, desinfección y eficacia de uso / Máscaras caseiras na pandemia de COVID-19: recomendações, características físicas, desinfecção e eficácia de uso
Preprint
in Portuguese
| SciELO Preprints
| ID: pps-2496
Responsible library:
BR1.1
ABSTRACT
Objective:
To describe the recommendations, physical characteristics, methods of disinfection and the effectiveness of using homemade masks in reducing the transmission of COVID-19.Methods:
Search was performed in the MEDLINE, SciELO and Google Scholar databases, in addition to the official recommendations for use.Results:
31 references were included. The filtration capacity of tissues varied between 5 and 98%. 100% cotton fabrics in two or three layers showed filtration efficiency between 70 and 99%, in vitro. Homemade masks, surgical and respirators showed breathability between 2.2 to 3.0 Pascal. The ability to reduce the spread of microorganisms by people wearing home masks was three times less than when using surgical masks, but it was superior to not wearing masks.Conclusion:
The breathability of homemade masks may be adequate, while the filtration efficiency seems to be inferior to surgical masks, but superior to no mask use. There is no evidence to support the efficacy and effectiveness of homemade masks.RESUMO
Objetivo:
Descrever as recomendações, características físicas, métodos de desinfecção e eficácia de uso de máscaras caseiras na redução da transmissão da COVID-19.Métodos:
Realizou-se busca nas bases de dados MEDLINE, SciELO e Google Scholar, além das recomendações oficiais de uso.Resultados:
Foram incluídas 31 referências. A capacidade de filtração de tecidos variou entre 5 e 98%. Tecidos 100% algodão em duas ou três camadas apresentaram eficácia de filtração entre 70 e 99% em estudos in vitro. Máscaras caseiras, cirúrgicas e respiradores apresentaram respirabilidade entre 2,2 e 3,0 Pascal. A capacidade de redução da propagação de microrganismos por pessoas usando máscaras caseiras foi três vezes menor do que ao usar máscaras cirúrgicas, embora tenha sido superior ao não uso de máscaras.Conclusão:
A respirabilidade de máscaras caseiras mostrou-se adequada, enquanto a eficácia de filtração parece ser inferior à das máscaras cirúrgicas, mas superior a não usar máscara. Não há evidências que respaldem a eficácia e efetividade das máscaras caseiras.
Full text:
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Collection:
Preprints
Database:
SciELO Preprints
Type of study:
Screening study
Language:
Portuguese
Year:
2021
Document type:
Preprint