Universidade de São Paulo, Escola de Enfermagem de Ribeirão Preto, PAHO/WHO Collaborating Centre for Nursing Research Development, Ribeirão Preto, SP, Brazil.
Centro Universitário Saúde ABC, Faculdade de Medicina do ABC, Santo André, SP, Brazil.
Rev Lat Am Enfermagem. 2021 Oct 29;29:e3492. doi: 10.1590/1518-8345.5135.3492. eCollection 2021.
to analyze the scientific evidence available on the different reprocessing methods and the necessary conditions for reuse of the N95 face respirator mask or equivalent.
an integrative literature review. The PICO strategy was used to elaborate the question. The search was conducted in four databases: PubMed, SciVerse Scopus, WebofScience and EMBASE, considering any period of time.
a total of 32 studies were included from the 561 studies identified, and they were presented in two categories: "Conditions for reuse" and "Reprocessing the masks". Of the evaluated research studies, seven(21.8%) addressed the reuse of the N95 face respirator mask or equivalent and 25(78.1%) evaluated different reprocessing methods, namely: ultraviolet germicidal irradiation(14); hydrogen peroxide(8); vapor methods(14); using dry heat(5) and chemical methods(sodium hypochlorite[6], ethanol[4] and sodium chloride with sodium bicarbonate and dimethyldioxirane[1]). We emphasize that different methods were used in one same article.
no evidence was found to support safe reprocessing of face respirator masks. In addition, reuse is contraindicated due to the risk of self-contamination and inadequate sealing.
分析不同再处理方法和重复使用 N95 口罩或同等口罩所需条件的现有科学证据。
综合文献复习。使用 PICO 策略来阐述问题。在四个数据库（PubMed、SciVerse Scopus、WebofScience 和 EMBASE）中进行了搜索，考虑了任何时间段。
从确定的 561 项研究中总共纳入了 32 项研究，它们分为两类：“重复使用的条件”和“口罩的再处理”。在所评估的研究中，有七项（21.8%）研究了 N95 口罩或同等口罩的重复使用，25 项（78.1%）评估了不同的再处理方法，即：紫外线杀菌照射（14 项）、过氧化氢（8 项）、蒸汽方法（14 项）、使用干热（5 项）和化学方法（次氯酸钠[6]、乙醇[4]和氯化钠与碳酸氢钠和二甲基二氧杂环乙烷[1]）。我们强调，在同一篇文章中使用了不同的方法。
没有证据支持安全地对口罩进行再处理。此外，由于存在自我污染和密封不足的风险，不建议重复使用。
