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Hi Brains Trust,
Have you noticed staff wearing double surgical masks? I have noticed this practice recently and just looking for evidence to refer to when discussing with staff that think it is a good idea?.
Many Thanks in advance
Jayne
Jayne O’Connor RN ,BSc.,Inf.Cont
IPC Co-Ordinator
Sydney Adventist Hospital | 185 Fox Valley Road, Wahroonga, NSW 2076p: +61 2 9480 9732 | f: +61 2 9470 8052 | m: +61 0406 752685 | e: jayne.oconnor@sah.org.au
http://www.sah.org.au
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Hi Jayne
They may be taking it from CDC and getting confused with wearing a cloth mask under a disposable mask. https://www.cdc.gov/coronavirus/2019-ncov/your-health/effective-masks.html
Kind regards
Kareen Dunlop
Consultant Nurse EducatorSent from my iPhone
> On 10 Feb 2022, at 09:46, Jayne OConnor wrote:
>
>
> Hi Brains Trust,
>
> Have you noticed staff wearing double surgical masks? I have noticed this practice recently and just looking for evidence to refer to when discussing with staff that think it is a good idea?.
>
> Many Thanks in advance
>
> Jayne
>
> Jayne O’Connor RN ,BSc.,Inf.Cont
> IPC Co-Ordinator
> Sydney Adventist Hospital | 185 Fox Valley Road, Wahroonga, NSW 2076
>
> p: +61 2 9480 9732 | f: +61 2 9470 8052 | m: +61 0406 752685 | e: jayne.oconnor@sah.org.au
> http://www.sah.org.au
>
>
>
>
>
> CAUTION: This message may contain both confidential and privileged information intended for the addressee named above. If you are not the intended recipient you are hereby notified that any dissemination, distribution or reproduction of this message is prohibited. If you have received this message in error please notify the sender immediately, then destroy the original message. Any views expressed in this message are solely those of the individual sender, except where the sender is specifically authorised by Adventist HealthCare Limited to state that they are the views of Adventist HealthCare Limited.
> This message has been scanned for malware by Forcepoint. http://www.forcepoint.com
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> MESSAGES POSTED TO THIS LIST ARE SOLELY THE OPINION OF THE AUTHOR, AND DO NOT REPRESENT THE OPINION OF ACIPC.
> The use of trade/product/commercial brand names through the list is discouraged by ACIPC. If you wish to discuss specific reference to products or services by brand or commercial names, please do this outside the list.
>
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> You can unsubscribe manually from this list by sending ‘signoff acipclist’ (without the quotes) to listserv@aicalist.org.auMESSAGES POSTED TO THIS LIST ARE SOLELY THE OPINION OF THE AUTHOR, AND DO NOT REPRESENT THE OPINION OF ACIPC.
The use of trade/product/commercial brand names through the list is discouraged by ACIPC. If you wish to discuss specific reference to products or services by brand or commercial names, please do this outside the list.
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Hi Jayne
Are 2 Masks Better Than 1 at Preventing COVID-19 Spread? (healthline.com)
This is taken from the popular press, so take it as you will, but this part makes physiological and mechanical sense to me:
Binghamton University mechanical engineering assistant professor Scott Schiffres, PhD, who’s been working on testing masks since the COVID-19 pandemic began, said that increasing protection isn’t just about adding more layers of filtration.
If the masks are worn in a way that compromises the fit of the masks on the face, this may allow unfiltered air to leak through gaps.
For example, wearing two surgical masks won’t be better than one, Schiffres said.
“It is not the ability of the filter that limits performance,” he said, “but the fit to the face (how much air leaks at the face seal).”
“The surgical mask material itself is very good (>95 percent at 0.1 um), but in practice about 20 percent of the air will slip between the mask and the seal of the mask, so the efficiency would effectively be about 80 percent,” Schiffres said.
“If you were to just put two surgical masks one on top of another, more of the air would actually leak around the seal as the resistance through the masks increases, and even less air would be filtered, making this double masking detrimental,” he said.
“The most important thing,” Schiffres said, “is not to have a false sense of confidence in the filtration of the mask, as it can only be as good as the fit to your face allows.”
As Kareen has pointed out, CDC does recommend double masking with cloth masks, as filtration is definitely increased, especially if you have two 2-layer masks (many cloth masks commercially sold in the US are 2 layer rather than 3).Cheers
MichaelMichael Wishart | Infection Control Coordinator, CICP-E
St Vincent’s Private Hospital Northside | 627 Rode Road CHERMSIDE QLD 4032
M +61 448 954 282 | T +61 7 3326 3068 | F +61 7 3607 2226
E michael.wishart@svha.org.au |
W https://www.svphn.org.au
[http://i8.cmail19.com/ei/t/6C/F77/A00/141133/csfinal/StaticEmailFooter-SVPHN-Celebrating20Years-650×150-9900000000079e3c.png]St Vincent’s Private Hospital Brisbane | 411 Main Street KANGAROO POINT QLD 4169
M +61 448 954 282 | T +61 7 3240 1208 | F +61 7 3240 1166
E michael.wishart@svha.org.au |
W https://www.svphb.org.au[cid:image001.png@01D7641B.978242F0][cid:image005.jpg@01D76380.8ECE2FC0]
Hi Brains Trust,
Have you noticed staff wearing double surgical masks? I have noticed this practice recently and just looking for evidence to refer to when discussing with staff that think it is a good idea?.
Many Thanks in advance
Jayne
Jayne O’Connor RN ,BSc.,Inf.Cont
IPC Co-Ordinator
Sydney Adventist Hospital | 185 Fox Valley Road, Wahroonga, NSW 2076p: +61 2 9480 9732 | f: +61 2 9470 8052 | m: +61 0406 752685 | e: jayne.oconnor@sah.org.au
http://www.sah.org.au
[cid:image001.png@01D81E76.1550A310]
[1_twitter] [2_linkedIn] [3_facebook] [4_insta] [5_youtube]This message has been scanned for malware by Forcepoint. http://www.forcepoint.com
MESSAGES POSTED TO THIS LIST ARE SOLELY THE OPINION OF THE AUTHOR, AND DO NOT REPRESENT THE OPINION OF ACIPC.The use of trade/product/commercial brand names through the list is discouraged by ACIPC. If you wish to discuss specific reference to products or services by brand or commercial names, please do this outside the list.
Archive of all messages are available at http://aicalist.org.au/archives – registration and login required.
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This email and any attachments to it (the “Email”) is confidential and is for the use only of the intended recipient, and may not be duplicated or used by any other party without the express consent of the sender. If you are not the intended recipient of the Email, please notify the sender immediately by return email, delete the Email, and do not copy, print, retransmit, store or act in reliance on the Email. St Vincent’s Health Australia (“SVHA”) does not guarantee that the Email is free from errors, viruses or interference. Emails to and from SVHA or its related entities may be scanned and filtered in locations outside Australia
MESSAGES POSTED TO THIS LIST ARE SOLELY THE OPINION OF THE AUTHOR, AND DO NOT REPRESENT THE OPINION OF ACIPC.
The use of trade/product/commercial brand names through the list is discouraged by ACIPC. If you wish to discuss specific reference to products or services by brand or commercial names, please do this outside the list.
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Thanks Kareen your response,
I agree, just adds to poor compliance headache!!!
Thanks
JayneJayne O’Connor RN ,BSc.,Inf.Cont
IPC Co-Ordinator
Sydney Adventist Hospital | 185 Fox Valley Road, Wahroonga, NSW 2076p: +61 2 9480 9732 | f: +61 2 9470 8052 | m: +61 0406 752685 | e: jayne.oconnor@sah.org.au
http://www.sah.org.au
[cid:image001.png@01D81E99.61DA0FA0]
[1_twitter] [2_linkedIn] [3_facebook] [4_insta] [5_youtube]From: ACIPC Infexion Connexion [mailto:ACIPCLIST@ACIPC.ORG.AU] On Behalf Of Kareen Dunlop
Sent: Thursday, 10 February 2022 1:36 PM
To: ACIPCLIST@ACIPC.ORG.AU
Subject: [EXT] Re: [ACIPC_Infexion_Connexion] Double maskingHi Jayne
They may be taking it from CDC and getting confused with wearing a cloth mask under a disposable mask. https://www.cdc.gov/coronavirus/2019-ncov/your-health/effective-masks.html
Kind regards
Kareen Dunlop
Consultant Nurse EducatorSent from my iPhone
On 10 Feb 2022, at 09:46, Jayne OConnor wrote:
Hi Brains Trust,
Have you noticed staff wearing double surgical masks? I have noticed this practice recently and just looking for evidence to refer to when discussing with staff that think it is a good idea?.
Many Thanks in advance
Jayne
Jayne O’Connor RN ,BSc.,Inf.Cont
IPC Co-Ordinator
Sydney Adventist Hospital | 185 Fox Valley Road, Wahroonga, NSW 2076p: +61 2 9480 9732 | f: +61 2 9470 8052 | m: +61 0406 752685 | e: jayne.oconnor@sah.org.au
http://www.sah.org.au
[cid:image001.png@01D81E76.1550A310]
[1_twitter] [2_linkedIn] [3_facebook] [4_insta] [5_youtube]CAUTION: This message may contain both confidential and privileged information intended for the addressee named above. If you are not the intended recipient you are hereby notified that any dissemination, distribution or reproduction of this message is prohibited. If you have received this message in error please notify the sender immediately, then destroy the original message. Any views expressed in this message are solely those of the individual sender, except where the sender is specifically authorised by Adventist HealthCare Limited to state that they are the views of Adventist HealthCare Limited.
This message has been scanned for malware by Forcepoint. http://www.forcepoint.com
MESSAGES POSTED TO THIS LIST ARE SOLELY THE OPINION OF THE AUTHOR, AND DO NOT REPRESENT THE OPINION OF ACIPC.The use of trade/product/commercial brand names through the list is discouraged by ACIPC. If you wish to discuss specific reference to products or services by brand or commercial names, please do this outside the list.
Archive of all messages are available at http://aicalist.org.au/archives – registration and login required.
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MESSAGES POSTED TO THIS LIST ARE SOLELY THE OPINION OF THE AUTHOR, AND DO NOT REPRESENT THE OPINION OF ACIPC.The use of trade/product/commercial brand names through the list is discouraged by ACIPC. If you wish to discuss specific reference to products or services by brand or commercial names, please do this outside the list.
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MESSAGES POSTED TO THIS LIST ARE SOLELY THE OPINION OF THE AUTHOR, AND DO NOT REPRESENT THE OPINION OF ACIPC.
The use of trade/product/commercial brand names through the list is discouraged by ACIPC. If you wish to discuss specific reference to products or services by brand or commercial names, please do this outside the list.
Archive of all messages are available at http://aicalist.org.au/archives – registration and login required.
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Gday
Do we know where that efficiency of 95% for 0.1micron particles came from?
My understanding was that the 3-layered material was only good for particles >5microns in size.
It may be that different tests have given different results.
Thank you
Regards
Sent from LR Consulting Engineers
> On 10 Feb 2022, at 12:14 pm, Michael Wishart wrote:
>
>
> Hi Jayne
>
> Are 2 Masks Better Than 1 at Preventing COVID-19 Spread? (healthline.com)
>
> This is taken from the popular press, so take it as you will, but this part makes physiological and mechanical sense to me:
> Binghamton University mechanical engineering assistant professor Scott Schiffres, PhD, whos been working on testing masks since the COVID-19 pandemic began, said that increasing protection isnt just about adding more layers of filtration.
>
> If the masks are worn in a way that compromises the fit of the masks on the face, this may allow unfiltered air to leak through gaps.
>
> For example, wearing two surgical masks wont be better than one, Schiffres said.
>
> It is not the ability of the filter that limits performance, he said, but the fit to the face (how much air leaks at the face seal).
>
> The surgical mask material itself is very good (>95 percent at 0.1 um), but in practice about 20 percent of the air will slip between the mask and the seal of the mask, so the efficiency would effectively be about 80 percent, Schiffres said.
>
> If you were to just put two surgical masks one on top of another, more of the air would actually leak around the seal as the resistance through the masks increases, and even less air would be filtered, making this double masking detrimental, he said.
>
> The most important thing, Schiffres said, is not to have a false sense of confidence in the filtration of the mask, as it can only be as good as the fit to your face allows.
>
> As Kareen has pointed out, CDC does recommend double masking with cloth masks, as filtration is definitely increased, especially if you have two 2-layer masks (many cloth masks commercially sold in the US are 2 layer rather than 3).
>
> Cheers
> Michael
>
> Michael Wishart | Infection Control Coordinator, CICP-E
>
> St Vincents Private Hospital Northside | 627 Rode Road CHERMSIDE QLD 4032
> M +61 448 954 282 | T +61 7 3326 3068 | F +61 7 3607 2226
> E michael.wishart@svha.org.au |
> W https://www.svphn.org.au
>
>
> St Vincents Private Hospital Brisbane | 411 Main Street KANGAROO POINT QLD 4169
> M +61 448 954 282 | T +61 7 3240 1208 | F +61 7 3240 1166
> E michael.wishart@svha.org.au |
> W https://www.svphb.org.au
>
>
>
> From: ACIPC Infexion Connexion On Behalf Of Jayne OConnor
> Sent: Thursday, 10 February 2022 11:05 AM
> To: ACIPCLIST@ACIPC.ORG.AU
> Subject: [ACIPC_Infexion_Connexion] Double masking
>
> Hi Brains Trust,
>
> Have you noticed staff wearing double surgical masks? I have noticed this practice recently and just looking for evidence to refer to when discussing with staff that think it is a good idea?.
>
> Many Thanks in advance
>
> Jayne
>
> Jayne O’Connor RN ,BSc.,Inf.Cont
> IPC Co-Ordinator
> Sydney Adventist Hospital | 185 Fox Valley Road, Wahroonga, NSW 2076
>
> p: +61 2 9480 9732 | f: +61 2 9470 8052 | m: +61 0406 752685 | e: jayne.oconnor@sah.org.au
> http://www.sah.org.au
>
>
>
>
>
> CAUTION: This message may contain both confidential and privileged information intended for the addressee named above. If you are not the intended recipient you are hereby notified that any dissemination, distribution or reproduction of this message is prohibited. If you have received this message in error please notify the sender immediately, then destroy the original message. Any views expressed in this message are solely those of the individual sender, except where the sender is specifically authorised by Adventist HealthCare Limited to state that they are the views of Adventist HealthCare Limited.
> This message has been scanned for malware by Forcepoint. http://www.forcepoint.com
>
> MESSAGES POSTED TO THIS LIST ARE SOLELY THE OPINION OF THE AUTHOR, AND DO NOT REPRESENT THE OPINION OF ACIPC.
> The use of trade/product/commercial brand names through the list is discouraged by ACIPC. If you wish to discuss specific reference to products or services by brand or commercial names, please do this outside the list.
>
> Archive of all messages are available at http://aicalist.org.au/archives – registration and login required.
>
> Replies to this message will be directed back to the list. To create a new message send an email to acipclist@acipc.org.au
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> This email and any attachments to it (the “Email”) is confidential and is for the use only of the intended recipient, and may not be duplicated or used by any other party without the express consent of the sender. If you are not the intended recipient of the Email, please notify the sender immediately by return email, delete the Email, and do not copy, print, retransmit, store or act in reliance on the Email. St Vincent’s Health Australia (“SVHA”) does not guarantee that the Email is free from errors, viruses or interference. Emails to and from SVHA or its related entities may be scanned and filtered in locations outside Australia MESSAGES POSTED TO THIS LIST ARE SOLELY THE OPINION OF THE AUTHOR, AND DO NOT REPRESENT THE OPINION OF ACIPC.
> The use of trade/product/commercial brand names through the list is discouraged by ACIPC. If you wish to discuss specific reference to products or services by brand or commercial names, please do this outside the list.
>
> Archive of all messages are available at http://aicalist.org.au/archives – registration and login required.
>
> Replies to this message will be directed back to the list. To create a new message send an email to acipclist@acipc.org.au
>
> To send a message to the list administrator send an email to admin@acipc.org.au
>
> You can unsubscribe manually from this list by sending ‘signoff acipclist’ (without the quotes) to listserv@aicalist.org.auMESSAGES POSTED TO THIS LIST ARE SOLELY THE OPINION OF THE AUTHOR, AND DO NOT REPRESENT THE OPINION OF ACIPC.
The use of trade/product/commercial brand names through the list is discouraged by ACIPC. If you wish to discuss specific reference to products or services by brand or commercial names, please do this outside the list.
Archive of all messages are available at http://aicalist.org.au/archives – registration and login required.
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