From: "Reinhardt, Peter" <peter.reinhardt**At_Symbol_Here**YALE.EDU>
Subject: Re: [DCHAS-L] N-95 disinfection and reuse
Date: Sat, 28 Mar 2020 15:58:14 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 5082202F-9613-4D1A-9586-FC6E791172FC**At_Symbol_Here**yale.edu
In-Reply-To


Sorry about the non-working links.

 

I'd also like to point out this excellent U. Nebraska study (with detailed procedures) published March 19 explains "N95 Filtering Facepiece Respirator Ultraviolet Germicidal Irradiation (UVGI) Process for Decontamination and Reuse."

 

https://www.nebraskamed.com/sites/default/files/documents/covid-19/n-95-decon-process.pdf

 

Pete

 

From: "Wiediger, Susan" <swiedig**At_Symbol_Here**siue.edu>
Date: Saturday, March 28, 2020 at 11:56 AM
To: Peter Reinhardt <peter.reinhardt**At_Symbol_Here**yale.edu>
Subject: RE: N-95 disinfection and reuse

 

Hi Peter,

I found this really interesting. I wanted to mention that the link you sent was to your downloads and so didn't work…

I was able to find the document because you gave enough of the link, though:

https://m.box.com/shared_item/https%3A%2F%2Fstanfordmedicine.box.com%2Fv%2Fcovid19-PPE-1-1

or through links here

https://aim.stanford.edu/covid-19-evidence-service/

Thanks for sharing the information… although I don't know who in our area has a decontamination room like the Duke piece mentions!

Sue

 

From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> On Behalf Of Reinhardt, Peter
Sent: Friday, March 27, 2020 2:48 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: [DCHAS-L] N-95 disinfection and reuse

 

Colleagues,

 

On 25 March the Stanford School of Medicine published a nice Q&A on the shortage of face masks and N-95 respirators. See file:///Users/pareinhardt/Downloads/mask-ppe-EBM-Stanford%20Medicine%20v1.2-3-25-2020.pdf

 

On pages 5-6 there is a good discussion of the various methods that can be used to disinfect N-95s, including a helpful table and references. One refence shows that hot water vapor from boiling water for ten minutes is an effective decontamination method.

 

At Yale, we plan to use vaporized hydrogen peroxide to decontaminate and reuse N-95s using the methods described here:

 

https://www.safety.duke.edu/sites/default/files/N-95_VHP-Decon-Re-Use.pdf

 

https://www.fda.gov/media/136386/download

 

Pete Reinhardt

Director, Yale Office of Environmental Health and Safety

 

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