마스크 재사용 -＞ 3가지 방법으로 작은 성능저하로 바이러스 살균가능

[탄소중독화성인(창원)]

자외선, 전자레인지 이용한 스팀, 열과습기(?)로 한 실험에서

H5N1 바이러스가 묻은 N95 마스크를 효과적으로 살균 가능하였고 이후 입자필터능력도 크게 떨어지지 않았다고 합니다

참고로 UV(자외선)는 15w, 254-nm wavelength 램프로 25cm거리, 15분간 조사되었습니다

해외문헌 1 요약

Effectiveness of Three Decontamination Treatments against Influenza Virus Applied to Filtering Facepiece Respirators

(인플루엔자 바이러스가 가해진 안면마스크에 대한 3가지 제독방법)

Filtering facepiece respirators (FFRs) are recommended for use as precautions against airborne pathogenic microorganisms; however, during pandemics demand for FFRs may far exceed availability. Reuse of FFRs following decontamination has been proposed but few reported studies have addressed the feasibility. Concerns regarding biocidal efficacy, respirator performance post decontamination, decontamination cost, and user safety have impeded adoption of reuse measures. This study examined the effectiveness of three energetic decontamination methods [ultraviolet germicidal irradiation (UVGI), microwave-generated steam, and moist heat] on two National Institute for Occupational Safety and Health-certified N95 FFRs (3M models 1860s and 1870) contaminated with H5N1. An aerosol settling chamber was used to apply virus-laden droplets to FFRs in a method designed to simulate respiratory deposition of droplets onto surfaces. When FFRs were examined post decontamination by viral culture, all three decontamination methods were effective, reducing virus load by >4 log median tissue culture infective dose. Analysis of treated FFRs using a quantitative molecular amplification assay (quantitative real-time polymerase chain reaction) indicated that UVGI decontamination resulted in lower levels of detectable viral RNA than the other two methods. Filter performance was eval‎uated before and after decontamination using a 1% NaCl aerosol. As all FFRs displayed <5% penetration by 300-nm particles, no profound reduction in filtration performance was caused in the FFRs tested by exposure to virus and subsequent decontamination by the methods used. These findings indicate that, when properly implemented, these methods effectively decontaminate H5N1 on the two FFR models tested and do not drastically affect their filtering function; however, other considerations may influence decisions to reuse FFRs.

링크

http://annhyg.oxfordjournals.org/content/early/2011/08/21/annhyg.mer054.short

원본 PDF 파일 다운로드 가능 

여기는 전자레인지 이용 스팀살균에 대해 더 자세히 나와있네요

Eval‎uation of Microwave Steam Bags for the Decontamination of Filtering Facepiece Respirators

요약

Reusing filtering facepiece respirators (FFRs) has been suggested as a strategy to conserve available supplies for home and healthcare environments during an influenza pandemic. For reuse to be possible, used FFRs must be decontaminated before redonning to reduce the risk of virus transmission; however, there are no approved methods for FFR decontamination. An effective method must reduce the microbial threat, maintain the function of the FFR, and present no residual chemical hazard. The method should be readily available, inexpensive and easily implemented by healthcare workers and the general public. Many of the general decontamination protocols used in healthcare and home settings are unable to address all of the desired qualities of an efficient FFR decontamination protocol. The goal of this study is to eval‎uate the use of two commercially available steam bags, marketed to the public for disinfecting infant feeding equipment, for FFR decontamination. The FFRs were decontaminated with microwave generated steam following the manufacturers' instructions then eval‎uated for water absorption and filtration efficiency for up to three steam exposures. Water absorption of the FFR was found to be model specific as FFRs constructed with hydrophilic materials absorbed more water. The steam had little effect on FFR performance as filtration efficiency of the treated FFRs remained above 95%. The decontamination efficacy of the steam bag was assessed using bacteriophage MS2 as a surrogate for a pathogenic virus. The tested steam bags were found to be 99.9% effective for inactivating MS2 on FFRs; however, more research is required to determine the effectiveness against respiratory pathogens.

링크

http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0018585#pone-0018585-g003

링크된 사이트에 나온 전자레인지 스팀살균 방법

해외문헌 3

http://www.sciencedirect.com/science/article/pii/S019665531000814X

요건 돈내고 봐야되네요 근데 첫번째랑 거의 비슷한 내용인듯 합니다.

재사용이 가능하다 해도 소독준비중 바이러스가 날릴수도 있고 어떻게 하느냐에 따라 소독이나 마스크 성능이 저하될수 있으니 가능하면 일회용으로 써야할것입니다. 하지만 기간이 길어진다면, 메르스 말고 더 치명적이고 오래가는 판데믹이 온다면 반드시 필요한 기술이라 생각됩니다.

마스크 다썻다고 그냥 다닐순 없으니까요 (가능하면 안나가야되지만..)

※산업용/보건용 방진마스크의 이야기이며 황사마스크는 이야기가 좀 달라질수 있습니다.

좀더 검증후 올리려 했는데 몸살이 나서..ㅠㅠ 대충 요약만 보고 올렸습니다.

가족중 병원 입원할사람도 있고.. 위험지역 지인들 보호장비를 택배보내고 다른지인들것도 준비한다고 정신이 없네요. 미치겠습니다 ㅎㅎ 중요한건 이제 다 보내서 좀 맘이 놓이네요. 근데 오늘 택배가 쉬는날이라 월욜에 도착한다네요 그때까지 별일 없어야 하는데

요건 배포용 소독용 알콜들.. 예전에 공병이 필요해서 사면서 100개씩 팔길레 궁시렁 거렸는데 요렇게 활용되네요

[탄소중독화성인(창원)]

감사합니다
요즘 정신도 없고 재료들도 안와서 수요일이나 가능할것 같습니다.

[탄소중독화성인(창원)]

넵^^