From: Bruce A. Hart <bhart**At_Symbol_Here**SVSU.EDU>
Subject: Re: [DCHAS-L] COVID-19 Question
Date: Tue, 24 Mar 2020 11:31:55 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: DM5PR01MB22193B1933E4B0FC6877B162CEF10**At_Symbol_Here**DM5PR01MB2219.prod.exchangelabs.com
In-Reply-To


We have a small Sellstrom Germicidal Cabinet for safety glasses and goggles..  We use the UV system after washing goggles.  The box is small for the scale needed at a hospital now and was not geared for this level of disinfection but perhaps a firm like Sellstrom can offer some kind of commercial suggestions or support to the NIH study.


From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> on behalf of Wright, Mike <mwright**At_Symbol_Here**USW.ORG>
Sent: Monday, March 23, 2020 6:37 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Subject: Re: [DCHAS-L] COVID-19 Question
 

The University of Nebraska has developed a protocol for using UV. Here's a post from JAMA online:

 

Post on JAMA (March 20) from University of Nebraska Medical Center on disinfecting PPE:

  https://jamanetwork.com/journals/jama/fullarticle/2763590 

March 20, 2020

UV Light Machines For Decontamination

Vicky Cerino, BS | University of Nebraska Medical Center

In light of the national shortage of one-use personal protective equipment (PPE), the University of Nebraska Medical Center and its hospital partner, Nebraska Medicine, have developed a safe and effective method to decontaminate these items so they can be used multiple times instead of just once.

A team led by John Lowe, PhD, UNMC assistant vice chancellor for inter-professional health security training and education, is using ultraviolet light towers to irradiate high numbers of masks, which were originally designed to only be used once. The strategy will allow Nebraska Medicine to greatly extend its supply of these items during the coronavirus pandemic.

"The shortage of PPE is a nationwide issue - each and every one of these items is increasingly precious," said Mark Rupp, MD, chief of the infectious diseases division at UNMC. "Although we were well prepared, our supplies were beginning to dwindle. We had to find a way to keep our providers and patients safe, and this will definitely help us achieve that goal."

The decontamination of these items works like this: groups of masks are safely bagged and transported to a room inside the hospital which is equipped with two ultraviolet light towers. The PPE is hung on wires stretching the length of the room and then decontaminated when the lights are powered on. The items are then removed and returned to the original owners for reuse.

"The shortage has forced us to be innovative," said Dr. Lowe. "While these items weren't meant to be used more than once, this is a 100% safe way to extend their useful life. Other major hospital systems in the U.S. have also started to implement this method for the same reason we are."

Our staff members have been provided with instructions on how to safely remove their PPE and place it in bags for transport to the decontamination room.

Several community partners and concerned members of the public have offered to donate masks to help us in this time of need. We greatly appreciate these offers and are exploring all of them to continue to add to our stockpile of personal protective equipment.

 

 

NIOSH earlier studied this with respect to H1N1, also concluding that UV was a good choice:

 

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2781738/pdf/mep070.pdf

 

 

Mike Wright

 

Michael J. Wright

Director of Health, Safety and Environment

United Steelworkers

 

412-562-2580 office

412-370-0105 cell

 

"My friends, love is better than anger. Hope is better than fear. Optimism is better than despair. So let us be loving, hopeful and optimistic. And we'll change the world."

                                                                                                                                                                                         Jack Layton

 

 

 

 

From: ACS Division of Chemical Health and Safety [mailto:DCHAS-L**At_Symbol_Here**PRINCETON.EDU] On Behalf Of Rupkey, Steve
Sent: Monday, March 23, 2020 4:44 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: Re: [DCHAS-L] COVID-19 Question

 

Hello:

 

Has anyone considered irradiation of the N-95 respirators, using commercial food irradiation equipment?

 

I know a plan must be developed to collect, store, transport, etc. the respirators, but any thoughts on the concept?

 

Thanks,

Steve Rupkey

 

 

 

From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> on behalf of Michael <mabuczynski**At_Symbol_Here**HOTMAIL.COM>
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Date: Monday, March 23, 2020 at 3:32 PM
To: "DCHAS-L**At_Symbol_Here**PRINCETON.EDU" <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Subject: Re: [DCHAS-L] COVID-19 Question

 

The N-95 is classified as a "Single use disposable respirator" These were not meant to be reused and OSHA  requires a form to filled out that the user understands the limitations and knows how to don and doff the unit under normal circumstances.

 

The problem with any respirator including reusable types is the decontamination and storage after use/cleaning.  As a former OSHA Industrial Hygienist, I often enforced the respiratory standard with all of these requirements.

 

Now I know there is a current emergency and of course everyone is looking for an interim solution to extend life. To develop a procedure to decontaminate the N-95 you must be aware of not destroying the integrity( bleach???). We do know that the 91% isopropanol works without destroying the material. Then you must look at the way you are handling the used respirators as not to spread further contamination.  Next step is the storage before the next use (new baggie!)

 

It may be helpful to contact NIOSH and/or the manufacturer (3M for example) and ask them for their recommendations.  I would expect given the recent emergency/need vs shortage they are working on a possible solution.

 

Mike Buczynski

 

 

 

 

 


From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> on behalf of Monique Wilhelm <mwilhelm**At_Symbol_Here**UMICH.EDU>
Sent: Monday, March 23, 2020 2:08 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Subject: Re: [DCHAS-L] COVID-19 Question

 

A friend who is a surgical nurse has explained to me that they are
using the cloth masks to cover their N-95s so that they can remove the
cover mask and replace if there is a noticeable splatter incident,
thereby making the N-95 masks effective for a longer period.  They are
then reusing the N-95 without specific instruction for storage....she
asked me how to store.  I have no answer.

 Monique

_________________________________________________________

Monique Wilhelm, M.S., NRCC Certified CHO

ACS CHAS Secretary|2017 CERM E. Ann Nalley Award Recipient

Laboratory Manager|Adjunct Lecturer|Chemistry Club Advisor

Department of Chemistry & Biochemistry|University of Michigan-Flint

Emaill: mwilhelm**At_Symbol_Here**umich.edu




 Monique

_________________________________________________________

Monique Wilhelm, M.S., NRCC Certified CHO

ACS CHAS Secretary|2017 CERM E. Ann Nalley Award Recipient

Laboratory Manager|Adjunct Lecturer|Chemistry Club Advisor

Department of Chemistry & Biochemistry|University of Michigan-Flint

Emaill: mwilhelm**At_Symbol_Here**umich.edu






On Mon, Mar 23, 2020 at 3:03 PM Lawrence M Gibbs <lgibbs**At_Symbol_Here**stanford.edu> wrote:
>
> Hi Tried sending this with document attached but was rejected by site.  So am placing a link here that I hope will get one to the site of the same document: Final Report for the Bioquell Hydrogen Peroxide Vapor (HPV) Decontamination for Reuse of N95 Respirators
>
> http://wayback.archive-it.org/7993/20170113034232/http://www.fda.gov/downloads/EmergencyPreparedness/Counterterrorism/MedicalCountermeasures/MCMRegulatoryScience/UCM516998.pdf
>
>
>
> From: Lawrence M Gibbs
> Sent: Monday, March 23, 2020 11:04 AM
> To: neal**At_Symbol_Here**CHEMICAL-SAFETY.COM; DCHAS-L**At_Symbol_Here**PRINCETON.EDU
> Subject: RE: [DCHAS-L] COVID-19 Question
>
>
>
> Neal et al,
>
>
>
> Keep in mind particulate filtering respirators were developed primarily for inert particulate matter (wood dust, silica, etc.).   When used in a clinical setting, the particulate matter is no longer inert, but potentially can replicate and infect individuals upon exposure (uptake).  For this reason, reuse of an N-95 is not typically recommended for use in biohazard protection, as a general rule.
>
>
>
> Having said that we are entering that stage of an emergency where scarcity of the primary protective device is occurring.  A number of academic clinical centers are running into the same issues and are doing some testing of methodologies for possible reuse of n-95 particle respirators.  The attached is one such report on methodology for disinfection of the masks for possible reuse. Note that gas or vapor is needed to assure complete penetration of the filtrate substrate where infectious particulates may adhere.  Work is currently being done by some of the regional academic bio research facilities on this and protocols being developed demonstrating the process and testing using indicator strips of the disinfection.   I suggest caution on applying considerations for non-viable particulates to the current situation for N-95s or other respiratory protective equipment.
>
>
>
> Larry
>
>
>
> Lawrence M. Gibbs, CIH, FAIHA
>
> Associate Vice Provost Emeritus
>
> Stanford University
>
> lgibbs**At_Symbol_Here**stanford.edu
>
> (c) 650-387-1131
>
>
>
>
>
>
>
> From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON..EDU> On Behalf Of NEAL LANGERMAN
> Sent: Monday, March 23, 2020 10:23 AM
> To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
> Subject: [DCHAS-L] COVID-19 Question
>
>
>
> All
>
> What do you say to a healthcare provider (assume they are in your core family) who has been told to ration N95 masks. Told to reuse them.
>
> Healthcare provider wants to know about sanitizing them; about effectiveness; about building their own mask.
>
> FYI, here is some NIH published data:
>
>
>
> Reduction to exposure by virus-like particulates. Based on article published by NIH
>
> Mask Type                                          % reduction of particulates
>
> N95                                                                 99
>
> SURGICAL MASK                                        74
>
> HOMEMADE TEA CLOTH MASK             58
>
>
>
> Also, the Elan Musk companies delivered 50,000 N95 masks to a hospital today.
>
>
>
> nl
>
>
>
> ------------------------------------------------------------------------------------
>
> Safety is the practice of fixed and unbendable principles, the first of which is to be flexible at all times. Paraphrase of Everett Dirksen.
>
> The information contained in this message is privileged and confidential and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by replying to the message and deleting it from your computer.
>
>
>
> ACSafety has a new address:
>
> NEAL LANGERMAN, Ph.D.
>
> ADVANCED CHEMICAL SAFETY, Inc.
>
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