紫外線は性能を損なうことなくN95マスクの再利用のための洗浄が可能である。(Ultraviolet Light Can Clean N95 Masks for Reuse Without Hindering Performance, NIST Study Shows)

ad

2022-03-25 アメリカ国立標準技術研究所(NIST)

NISTの研究者は、特定の条件下で、紫外線がマスクに不要な変化を与えることなく、十分に消毒できることを発見しました。この発見は、科学的根拠に基づく標準的な紫外線消毒法の開発への重要な一歩となります。この方法は、将来的にPPEの供給が少なくなった場合に重要となる可能性があります。

<関連情報>

紫外線によるマスクの消毒について Disinfection of Respirators with Ultraviolet Radiation

Dianne L. Poster , Matthew Hardwick , C. Cameron Miller , Michael A. Riley , W. W. Shanaka I. Rodrigo , Andras E. Vladar , John D. Wright , Christopher D. Zangmeister , Clarence Zarobila , Jeremy Starkweather , John Wynne , and Jason Yilzarde Published: March 25, 2022
https://doi.org/10.6028/jres.126.058

紫外線は性能を損なうことなくN95マスクの再利用のための洗浄が可能である。(Ultraviolet Light Can Clean N95 Masks for Reuse Without Hindering Performance, NIST Study Shows)

Abstract

Data for interpreting virus inactivation on N95 face filtering respirators (FFRs) by ultraviolet (UV) radiation are important in developing UV strategies for N95 FFR disinfection and reuse for any situation, whether it be everyday practices, contingency planning for expected shortages, or crisis planning for known shortages. Data regarding the integrity, form, fit, and function of N95 FFR materials following UV radiation exposure are equally important. This article provides these data for N95 FFRs following UV-C irradiation (200 nm to 280 nm) in a commercial UV-C enclosure. Viral inactivation was determined by examining the inactivation of OC43, a betacoronavirus, inoculated on N95 FFRs. Different metrological approaches were used to examine irradiated N95 FFRs to determine if there were any discernible physical differences between non-irradiated N95 FFRs and those irradiated using the UV-C enclosure. Material integrity was examined using high-resolution scanning electron microscopy. Form, fit, and function were examined using flow resistance, tensile strength, and particle filtration measurements. A separate examination of filter efficiency, fit, and strap tensile stress measurements was performed by the National Personal Protective Technology Laboratory. Data from these metrological examinations provide evidence that N95 FFR disinfection and reuse using the UV-C enclosure can be effective.

Key words: disinfection; efficacy; face masks; flow resistance; gas flow; microscopy; N95; particle filtration; personal protective equipment; PPE; respirators; scanning electron microscopy; SEM; tensile strength; ultraviolet-C; ultraviolet germicidal irradiation; UVC; UVGI; virus.

医療・健康
ad
ad
Follow
ad
タイトルとURLをコピーしました