通过在 70°C 下干热巴氏消毒 1 小时，对手术口罩和 N95 呼吸器进行消毒。
Decontamination of surgical face masks and N95 respirators by dry heat pasteurization for one hour at 70°C.
机构信息
Disinfection Supply Centre, Ningbo Women and Children's Hospital, Ningbo, Zhejiang Province, China.
Central Laboratory, Ningbo First Hospital, Ningbo, Zhejiang Province, China.
出版信息
Am J Infect Control. 2020 Aug;48(8):880-882. doi: 10.1016/j.ajic.2020.05.026. Epub 2020 May 30.
BACKGROUND
The need for protective masks greatly exceeds their global supply during the current COVID-19 pandemic.
METHODS
We optimized the temperature used in the dry heat pasteurization method to destroy pathogens and decontaminate masks while retaining their filtering capacity.
RESULTS
The current study showed that dry heat at both 60°C and 70°C for 1 hour could successfully kill 6 species of respiratory bacteria and one fungi species, and inactivate the H1N1 indicator virus. After being heated at 70°C for 1, 2, and 3 hours, the N95 respirators and surgical face masks showed no changes in their shape and components. The filtering efficiency of bacterial aerosol for N95 respirators were 98%, 98%, and 97% after being heated for 1, 2, and 3 hour, respectively, all of which were over the 95% efficiency required and similar to the value before being heated (99%). The filtering efficiency for surgical face masks was 97%, 97%, and 96% for 1, 2, and 3 hours of heating, respectively, all of which were also similar to the value before being heated (97%).
CONCLUSIONS
This method can be used at home and can significantly resolve the current shortage of masks.
背景
在当前 COVID-19 大流行期间，防护口罩的需求量大大超过了全球供应量。
方法
我们优化了干热巴氏消毒法的温度，以在保持口罩过滤能力的同时破坏病原体和对其进行消毒。
结果
本研究表明，60°C 和 70°C 的干热 1 小时即可成功杀灭 6 种呼吸道细菌和 1 种真菌，并使 H1N1 指示病毒失活。在 70°C 加热 1、2 和 3 小时后，N95 呼吸器和手术口罩的形状和组成均未发生变化。N95 呼吸器对细菌气溶胶的过滤效率分别为加热 1、2 和 3 小时后的 98%、98%和 97%，均超过所需的 95%效率，且与加热前的值（99%）相似。手术口罩的过滤效率分别为加热 1、2 和 3 小时后的 97%、97%和 96%，也与加热前的值（97%）相似。
结论
这种方法可以在家中使用，可显著缓解当前口罩短缺的问题。
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