原創 廖博士 審校 黃向東 今天
APRIL 16, 2020 -- Exposing contaminated N95 respirators to vaporized hydrogen peroxide (VHP) or ultraviolet (UV) light appears to eliminate the SARS-CoV-2 virus from the material and preserve the integrity of the masks' fit for up to three uses, a National Institutes of Health (NIH) study shows.
2020年4月16日——美國國家衛生研究院（NIH）的一項研究顯示，將受汙染的N95口罩暴露在蒸發的過氧化氫（VHP）或紫外線（UV）下，可以消除材料中的SARS-CoV-2病毒，並保持口罩的完整性，可以重複使用三次。
Dry heat (70° C) was also found to eliminate the virus on masks but was effective for two uses instead of three.
乾熱（70°C）也能消除口罩上的病毒，但只能重複兩次。
Fischer and colleagues compared four methods for decontaminating the masks, which are designed for one-time use: UV radiation (260 – 285 nm); 70° C dry heat; 70% ethanol spray; and VHP.
菲舍爾和同事比較了四種一次性使用口罩的消毒方法：紫外線（260-285nm）；70°C乾熱；70%乙醇噴霧；VHP。
All four methods eliminated detectable SARS-CoV-2 virus from the fabric test samples, though the time needed for decontamination varied. VHP was the quickest, requiring 10 minutes. Dry heat and UV light each required approximately 60 minutes. Ethanol required an intermediate amount of time.
所有四種方法都從織物測試樣品中消除了可檢測到的SARS-CoV-2病毒，儘管消毒所需的時間不同。VHP是最快的，需要10分鐘。乾熱和紫外光各需要大約60分鐘。乙醇需要30分鐘。
To test durability over three uses, the researchers treated intact, clean masks with the same decontamination method and assessed function via quantitative fit testing.
為了測試三種用途的耐用性，研究人員用相同的消毒方法處理了完整、乾淨的口罩，並測試評估了其功能。
The researchers found that masks that had been decontaminated with ethanol spray did not function effectively after decontamination.
研究人員發現，用乙醇噴霧去汙的口罩在消毒並不能有效發揮作用。
By contrast, masks decontaminated with UV and VHP could be used up to three times and function properly. Masks decontaminated with dry heat could be used two times before function declined.
相比之下，用紫外線和VPH消毒的口罩可以使用三次，並且功能正常。乾熱消毒口罩可使用兩次。
The results will reassure clinicians, many of whom are already using these decontamination methods
研究結果將使已經在使用這些去汙消毒的臨床醫生放心.
文章出處
Assessment of N95 respirator decontamination and re-use for SARS-CoV-2
Robert Fischer, doi: https://doi.org/10.1101/2020.04.11.20062018
