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Hello Chris
The test data available certainly indicate that for small rooms they do remove small particles/aerosols from around 0.3microns. The selection should be based on a minimum 5 air changes per hour and located close to the occupant.
All of them have reasonable HEPA filters. The pre-filter quality and the seal around the filters does vary.
They are only of benefit in small volumes with little or no ventilation.
Pick the ones with the least electronics especially if the grid power is bad.
The Royal Melbourne Hospital has done some tests and have published the results.
Hope this helps.
Cheers
Lalith Ramachandra
Mechanical Engineer
LR Consulting Engineers
PO Box 40968 Casuarina, NT 0810
Ph 0401117423Sent from LR Consulting Engineers
> On 12 Sep 2022, at 3:51 pm, Maria Villasana wrote:
>
>
> Hi
> Yes, we use air purifier to our staff room. I think its a great tool as additional precaution. Efficacy I cannot comment sorry.
>
> Kind Regards
>
> Maria Villasana
> Care Manager / Registered Nurse
>
>
>
> Unanderra
>
> Woonona
> 70 Waples Road
> 11 Watergum Way
> UNANDERRA NSW 2526
> WOONONA NSW 2517
> T: (02) 4272 7700
> T: (02) 4222 9500
> F: (02) 4272 6699
> F: (02) 4222 9599
>
> Web: http://www.marcopolo.org.au
>
> This email message (or attachment) is confidential, and/or privileged and is intended for the use of the addressee only. If you are not the intended recipient you must not copy, distribute, take any action in relation to it or disclose it to anyone. Any confidentiality or privilege is not waived or lost by reason of mistaken delivery to you. Marco Polo Aged Care Services Limited is not responsible for any information not related to the business of Marco Polo Aged Care Services. If you have received this email in error, please notify the sender and destroy the email.
>
> From: ACIPC Infexion Connexion On Behalf Of Christine Morrison
> Sent: Monday, 12 September 2022 1:04 PM
> To: ACIPCLIST@ACIPC.ORG.AU
> Subject: [ACIPC_Infexion_Connexion] Portable air purifiers in RACFs
>
> Hi again,
>
> Another question from me, prompted by the recent changes to guidelines.
>
> Does anyone have air purifiers in their Aged Care Facilities and how do you use them and find their efficacy?
>
> Thanks in advance
>
> Kind regards,
>
> Chris
>
> Christine Morrison
> Practice Facilitator – Infection Control
> Practice Facilitation Team
>
> Level 3, Webber House,
> 439 Ann St, Brisbane Q 4000
> PO Box 10556, Brisbane Adelaide St Q 4000
>
> M: 0499526913
> E: cmorrison2@anglicaresq.org.au
> E: pft@anglicaresq.org.au
> W: anglicaresq.org.au
>
>
>
>
>
> I acknowledge and pay my respects to the traditional owners and custodians of the land in which I work, walk and live.
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G’day Dr McLean
As a non-health care person, I have found this issue a little confusing. An
“expert” on the ABC radio recently said that surgical masks were better at
reducing the release of the viral load from an infected person compared to
an N95!The extract below is from the Infection Control Experts Group of the
Australian Government:*This evidence is also supported by several systematic reviews and
meta-analyses of randomised controlled trials (RCTs) that have shown that
surgical masks and particulate filter respirators (PFRs) provide equivalent
protection against respiratory viral infections, with modes of transmission
likely to be similar to those of COVID-19 (30, 41-43).*This document was written in 2020, so I’m assuming things have changed
since then.Regards
Lalith Ramachandra
LR Consulting Engineers
for DIPL
PO Box 40968
Casuarina, NT
p 0401117423
e lalith.ramachandra@gmail.com*In the beginning the Universe was created. This*
*made a lot of people very angry and has been widely*
*regarded as a bad move.** Douglas Adams*On Tue, 12 Jul 2022 at 11:05, Alan mclean wrote:
>
> Without looking at the literature it would seem logical that a PRF works
> both ways during the respiratory cycle. It filters inspiratory and
> expiratory air, but slightly more on inspiratory as the slight negative
> pressure creates a tighter seal than during the positive pressure
> expiratory phase that may result in some very minor air leaking.
>
> My thoughts are they will provide much better source control than a
> surgical mask that is only designed to capture large droplets and not the
> smaller ones know to spread COVID. The limiting factor is source tolerance
> to their use.
>
> Regards
>
> Dr Alan McLean
>
> BHlthSc, MHlthAdmin, DrPH, FCHSM,CHE
>
> On 12 Jul 2022, at 10:27, Raby, Edward
> wrote:
>
>
> Reposting this… Keen to hear if anyone has an opinion or experience of
> implementing PFR use for source control. I don’t think there’s a right
> answer.
>
> Thanks
> Ed
>
> ——————————
> *From:* ACIPC Infexion Connexion on behalf of
> Raby, Edward
> *Sent:* Wednesday, 6 July 2022, 14:45
> *To:* ACIPCLIST@ACIPC.ORG.AU
> *Subject:* [ACIPC_Infexion_Connexion] PFR for source control
>
> CAUTION External Communication: This email originated from outside of the organisation. Do not click links or open attachments unless you recognise the sender and know the content is safe.
>
>
> Hello IPC community,
>
>
>
> Are you recommending PFRs for source control in your facilities?
>
>
>
> We are considering use for
>
> 1. COVID positive patients coming into outpatient areas for
> infusions/assessment
> 2. All visitors to very high risk areas, eg bone marrow transplant
> unit, as we reduce stringency of RAT screening and have increasing levels
> of non-COVID respiratory illness in community
>
>
>
> The available literature seems to provide evidence of only marginal
> theoretical benefit which needs to be balanced against the cost and
> confusion of applying this targeted strategy.
>
>
>
> Summarised in this systematic review 2022
> https://doi.org/10.1007/s00420-021-01775-y
>
> which in discussion says: The results of the present review indicate that
> the use of a surgical mask by the source of the aerosol reaches a higher
> level of protection than the use of the N95 respirator by the receiver
> (Diaz and Smaldone 2010; Mansour and Smaldone 2013; Patel et al 2016).
> These data suggest that traditional surgical masks are useful in preventing
> the transmission of respiratory diseases when applied at the source of the
> infected aerosol, significantly reducing the exposure of pathogens,
> functioning as an inhalation barrier; however, in regard to respiratory
> protection equipment, there are still doubts about which is the best type
> to be used for this purpose (Patel et al. 2016 ). In an environment of 27
> m3 occupied by five people, although the N95 respirator promotes greater
> filtration, surgical masks seemed to be more effective in reducing the
> release of bioaerosol, a difference mainly due to the adjustment and
> sealing of the mask to the face of the source (Xu et al. 2017).
>
>
>
> This is primarily based on the Patel/Smaldone 2016 paper
> http://dx.doi.org/10.1080/15459624.2015.1043050
>
> which reports findings from an in vitro model that perhaps underrepresents
> the efficiency and seal achieved in the majority of people with the current
> generation of soft shell PFRs.
>
>
>
> Keen to hear your approach/experience.
>
>
>
> Kind regards,
>
> Ed
>
>
>
>
>
> Dr Ed Raby
>
> Medical Director Infection Prevention and Control
>
> South Metropolitan Health Service, WA
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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
>
>
>
>
>
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Hello Liz
Modelling done by the Royal Melbourne Hospital indicates that a good
portable HEPA filter unit would remove most of the aerosols within about
15mins if the clean air delivery is selected for 15ACH. The tests they
conducted measured 2.5micron aerosol particles but HEPA filters will filter
down to 0.3microns.Given that they are recirculating the room air no room pressurisation is
achieved.Room pressures equalise when the door is opened.
Hope this helps.
Lalith Ramachandra
LR Consulting Engineers
Mechanical EngineerPO Box 40968
Casuarina, NT
p 0401117423
e lalith.ramachandra@gmail.com* Please, please, get vaccinated! *
On Wed, 17 Nov 2021 at 10:48, Liz Vanderlinde wrote:
> Hello Colleagues.
>
>
>
> In the absence of negative pressure rooms with view to admitting labouring
> women am looking for advice re use in room air purifiers? As rooms are
> closed.
>
> My thinking is adds to positive pressure when door opens? Any advice
> fortified by rationale evidence?
>
>
>
> Eternal Thanks
>
> *Liz Vanderlinde*
> Infection Prevention Control Co-ordinator
> *North West Private Hospital*
>
> [image: Description: hca_luye_logo]
>
> Brickport Road, Burnie TAS 7320, Australia
> *T* +61 3 6432 6005 *F* +61 3 6431 5766
> *E* liz.vanderlinde@healthecare.com.au *W* healthecare.com.au
>
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> EQuIP National
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Hello Lindy
I’m not a guru but will try and provide some guidance.
Do your sterile store rooms have terminal HEPA filters? And are the 4 rooms
connected?The reason I ask this is because the pressure drop across a clean HEPA
filter is around 200Pa, and the pressure across a closed door maybe around
10Pa i.e. the pressure across the door is 5% of the filter and therefore
very unlikely to have any effect on the flow of air through the HEPA filter
and so to have any effect on the other rooms – the airflow into the room
would be relatively constant or increase very slightly.When the door is opened the two pressures will equalise very quickly i.e.
the higher pressure will reduce. There will be mixing of air due to
turbulence etc.Generally the sterile store will open to a relatively “clean” side and this
is not an issue.If you need to maintain airflow from the sterile store to the other side,
you will need to maintain around 20Pa across the open doorway. This will
require an active control system and very very large quantities of air.
Generally not very practical (or required).A better design would have been to have two rooms per AHU or 4 separate
AHUs – an increase in cost but generally would have been discussed during
the design phase.When the door is open you cannot maintain the pressure differential unless
you have an active control system. I’m not aware of any guideline which
requires you to maintain the PD when the door is open.Isn’t there a sterile barrier on all items in the store?
Hope this helps a little.
Regards
Lalith Ramachandra
LR Consulting Engineers (Mech Engineer)PO Box 40968
Casuarina, NT
p 0401117423
e lalith.ramachandra@gmail.com* Please, please, get vaccinated! *
On Fri, 24 Sept 2021 at 17:08, Lindy Ryan (Mid North Coast LHD) wrote:
> Hello SSD and HVAC engineering gurus
>
>
>
> My question is
>
>
>
> the current configuration of one of our facilities new clinic services
> buildings (about to be commissioned) is that all sterile stock rooms (4
> Rooms) are off the same AHU and therefore have no redundancy if the unit
> was to fail the would compromise all 4 rooms. The other problem with this
> design is that when the door is opened to the main sterile stock room it
> affects the other 3 rooms dropping the differential pressure across the
> doors below 7pa and if those door are open at the same time there would be
> minimal pressure with the potential for contaminated air flowing into these
> sterile stock rooms.
>
>
>
> I can find in the engineering services guidelines that sterile store to
> corridor should be to 10pa and each pressure gradient step should be
> designed to 10pa however there is no clarity around:
>
> – Should all four rooms be off the same AHU
> – What is the minimal accepted pressure drop whilst a door is open or
> is the system to maintain 10pa across the door if open
> – If there is a minimum pressure drop level, how long can this occur
> for before the sterile room is compromised
>
>
>
> Can anyone advise/ help me with more useful advice as this is what we will
> be left with but I have my concerns and our builders are asking for
> evidence that what they have set up meets specs..I have concerns am I
> wrong?
>
>
>
> Any feedback gratefully acknowledged as we have little time to respond and
> lodge a response
>
>
>
> Kind regards
>
>
>
> Lindy
>
>
>
> *Lindy Ryan*
>
> District Infection Prevention & Control CNC | *Clinical Governance &
> Information Services MNCLHD *
>
> Level 1 Coffs Specialist Centre, Pacific Hwy, Coffs Harbour
> Office 66911984 or Mob 0419 990 693 | lindy.ryan@health.nsw.gov.au
> http://www.health.nsw.gov.au
>
>
>
> *General email enquires please use this email *
> MNCLHD-InfectionControl@health.nsw.gov.au
>
>
>
>
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Hello Kathleen
According to US CDC, there is still no clear evidence that transmission of any covid variants is possible in sufficient numbers to infect people, through the ducting of central air conditioning systems.
They have previously recommended high ventilation rates (fresh air) of around 4 air changes per hour or greater, to dilute any aerosolised particles.
Most hotels dont use central ducted plant for the guest bedrooms. And very little fresh air into the split systems or fan coil units that serve them. What they need to do is keep the toilet exhaust operational all the time to keep the each room under a slight negative pressure.
rom what I have read, the delta variant makes more copies of itself in a much quicker time within the infected persons. So may require higher ventilation rates than the variants before.
But, to answer your question, I dont think there is a clear answer and certainly not without knowing the type of a/c system and the ventilation rate etc.
Regards
Lalith Ramachandra
Mech Engineer
LR Consulting Engineers
Darwin, NTPh 0401117423
Sent from LR Consulting Engineers
> On 23 Jul 2021, at 2:32 pm, Kathleen Felstead wrote:
>
>
> HI All,
>
> Can anyone give me any direction in regards to what to do with air-conditioning/ heating systems at a Residential Aged Care site in the event of a COVID outbreak.
>
> Given that COVID has been spread at some of the medi hotels via air-conditioning systems and in particular the Delta strain.
>
> Is the thought that the air-conditioning would be turned off in zones affected?
>
> Your thoughts and guidance greatly appreciated.
>
> Kind Regards
>
> Kathleen
> Kathleen Felstead
> Clinical Quality & Education Consultant
>
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Hello
Most ceiling tiles will keep ceiling cavity dust from getting into the occupied space!
Health care facilities generally require surfaces to be cleanable – impervious and smooth so bugs dont have crevices to breed in. This then needs to be balanced with the requirements for good acoustics. Smooth hard surfaces tend to increase the reverberant field.
Tiles provide good maintenance access for services which run in the ceiling space. Plasterboard ceiling will require many access panels. And tiles are much easier for recessed light fittings. If you have to cut the plasterboard, then you might as well use tiles.
What you need to use will depend on the level of infection control required for that area.
Ceiling finishes are in the AHFG Part C (710).
Hope this helps a bit.
Lalith Ramachandra
Darwin, NT
Ph 0401117423
LR Consulting Engineers> On 1 Jul 2021, at 10:00 am, Kylie Robb wrote:
>
>
> Hi everyone,
>
> I have a question regarding the building code for dental practices or perhaps office based environments in general.
>
> A lighting designer for a new practice build is concerned about ceiling tiles and has specifically said a plasterboard ceiling is required as it seals the ceiling cavity above and prevents dust falling into the workspace. I agree this is a priority, but plaster board specifically? I will take a look at the AusHG Guidelines in the meantime, but I would still be interested to get the groups thoughts on this.
>
> Thanks all, I know everyone is hard at it right now and will certainly value any comments.
>
> Kylie
>
>
> Kylie Robb MHSM (Clinical Leadership), CICP-P, MAICD, FACIPC
> Head of Practice Services
> Infection Prevention and Control Professional (CICP-P)
> Adjunct Lecturer – University of Newcastle – Oral Health School of Health Sciences College of Health, Medicine and Wellbeing
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Not directly related but perhaps relevant.
I have read of an infection in a restaurant in China where the droplets were transported over a 6m distance on the air stream from a ceiling split a/c system (very directional airflow) to one particular table and not others.
Also read articles which discourage fans of any kind that can create drafts (>0.4m/s) which can then transport droplets over much longer distances.
Regards
Lalith Ramachandra
Mechanical Engineer
LR Consulting Engineers, Darwin, NTSent from my iPad
> On 19 Jan 2021, at 4:28 pm, Michael Wishart wrote:
>
>
> I thought this one had been done to death, but no, more controversy!
>
> Last time I checked, fans with internal blades were more acceptable than fans with external (visible) blades for use in patient rooms and clinical environments, due to the lack of dust on the blades.
>
> Now I am hearing that fans with concealed (internal) blades are no longer acceptable as the blades can’t be cleaned!
>
> Does anyone have any evidence-based recommendations on use of portable fans in patient environments, please?
>
> Thanks
> Michael
>
> Michael Wishart | Infection Control Coordinator, CICP-E
>
> St Vincents Private Hospital Northside | 627 Rode Road CHERMSIDE QLD 4032
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>
> St Vincents Private Hospital Brisbane | 411 Main Street KANGAROO POINT QLD 4169
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The important bit I think is the purge ventilation requirement which is 100% outside air or good filtration.
Just circulating the air in the room to get 20ch/hr will not remove any microbes. Other than the ones that stick to the side of the duct.
I have seen this table misapplied so many times.
Cheers
Lalith Ramachandra
Engineer, LR Consulting Engineers
Sent from LR Consulting Engineers
> On 3 Nov 2020, at 2:16 pm, Terry wrote:
>
> Hi Lalith,
>
> If you look at the note to the Table via the link it notes:
>
> ” Values apply to an empty room with no aerosol-generating source. With a person present and generating aerosol, this table would not apply. Other equations are available that include a constant generating source. However, certain diseases (e.g., infectious tuberculosis) are not likely to be aerosolized at a constant rate. The times given assume perfect mixing of the air within the space (i.e., mixing factor 1). However, perfect mixing usually does not occur. Removal times will be longer in rooms or areas with imperfect mixing or air stagnation.213 Caution should be exercised in using this table in such situations. For booths or other local ventilation enclosures, manufacturers instructions should be consulted. ”
>
> In other words, the CDC recognise that this is not a perfect guide applicable to all circumstances, thus reader / user beware.
>
> However in the context of an Operating Room, one would presume HEPA Filters and compliance with AS1668.2 in an Australian health facility.
>
> Kind Regards
> Terry McAuley
> Director
> MSc Medical Device Decontamination
>
> PO BOX 2249, Greenvale, VIC Australia 3059
> Mobile: +61 (0)438 109 692
> Email: terry@steamconsulting.com.au
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> —–Original Message—–
> From: ACIPC Infexion Connexion On Behalf Of Lalith Ramachandra
> Sent: Tuesday, November 3, 2020 2:47 PM
> To: ACIPCLIST@ACIPC.ORG.AU
> Subject: Re: [ACIPC_Infexion_Connexion] Covid cleaning post rest time
>
> Gday Terry
>
> Does it depend just on the air changes per hour or also on the fresh air rate (purge ventilation) and the filtration efficiency i e having HEPA filters etc?
>
> I have seen this equation/table being applied to other areas with lesser quality filters and smaller percentage of fresh air.
>
> Would appreciate your thoughts.
>
> Cheers
>
> Lalith Ramachandra
> Mechanical Engineer, LR Consulting Engineers, Darwin, NT
>
>
> Sent from LR Consulting Engineers
>
>> On 3 Nov 2020, at 11:37 am, Terry wrote:
>>
>> Hi Tracey,
>>
>> The resting time for the OR is based on the number of air exchanges according to the following table B.1 derived from the CDC and referenced in several state based guidance documents. Link to page here https://www.cdc.gov/infectioncontrol/guidelines/environmental/appendix/air.html
>>
>> In essence a 99% removal efficiency is achieved in an OR with 20 air changes per hour in 14 minutes or 99.9% removal efficiency in 21 minutes.
>>
>> Kind Regards
>> Terry McAuley
>> Director
>> MSc Medical Device Decontamination
>>
>> PO BOX 2249, Greenvale, VIC Australia 3059
>> Mobile: +61 (0)438 109 692
>> Email: terry@steamconsulting.com.au
>> Website: http://www.steamconsulting.com.au
>>
>>
>>
>>
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>> —–Original Message—–
>> From: ACIPC Infexion Connexion On Behalf Of Michael Wishart
>> Sent: Tuesday, November 3, 2020 11:01 AM
>> To: ACIPCLIST@ACIPC.ORG.AU
>> Subject: [ACIPC_Infexion_Connexion] Covid cleaning post rest time
>>
>> [Posted on behalf of member – Moderator]
>>
>> Reviewing our covid set up for theatre and if there needs to be a rest time post cleaning.
>> Originally I believe the theatre was to be rested for 1 hour ?
>> Looking for current literature and on what evidence it was changed.
>>
>> Thanks in advance Tracey
>>
>> Tracey Jones
>> CNC Operating theatre
>> The Townsville University Hospital.
>>
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Hello Liz
Most sterilisers are built-in i.e. located between two ss walls.
This cavity is generally vented (exhausted) to remove heat buildup and
moisture (to avoid condensation).The loading/packing area is generally segregated and is at a lower pressure
than the unloading and the sterile stock room. It’s unclear from the email
which side is getting warm.A single supply air vent above the door is unlikely to do much if the whole
area is getting warm. It’s most likely that the a/c unit is
undersized and/or there is inadequate supply air into the room or there is
no exhaust within the cavity.Hope this helps.
Cheers
Lalith Ramachandra
LR Consulting EngineersPO Box 40968
Casuarina, NT
p 0401117423
e lalith.ramachandra@gmail.com* To Spot the Expert, Pick the One Who Predicts the Job Will Take the
Longest and Cost the Most!*On Tue, 15 Sep 2020 at 10:30, VANDERLINDE, Liz wrote:
> Good Morning One and All
>
>
>
> During a recent audit we had a recommendation regarding the placement of
> outlet vents in the ceiling above the Steriliser doors.
>
> Temperatures in our CSSD Department become quite warm so looking for a
> reference that supports this
>
> Can anyone assist please
>
>
>
> Most appreciated.
>
> *Liz Vanderlinde*
> Infection Prevention Control Co-ordinator
> *North West Private Hospital*
>
> [image: Description: hca_luye_logo]
>
> Brickport Road, Burnie TAS 7320, Australia
> *T* +61 3 6432 6005 *F* +61 3 6431 5766
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>
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Hello Fiona
We have just converted a theatre to a negative pressure theatre.
We also did some CFD modelling beforehand and dust monitoring after.
Its being maintained at -5Pa.
So far it seems to be operating satisfactory.
Cheers
Sent from LR Consulting Engineers
> On 11 Jun 2020, at 12:10 pm, De Sousa, Fiona M wrote:
>
>
> Hi All,
>
> In response to COVID, and for future planning I have been asked to consider the creation of a negative pressure operating theatre for use in emergency surgery for a COVID positive case (e.g. C-section, post MVA).
>
> I am aware that this is against the usual recommendations which are for positive pressure operating theatre to reduce risk of Surgical Site Infection. However it has been raised with me that the risk of unexpected intubation of a COVID positive patient in a positive pressure theatre puts staff at risk.
>
> I am interested in how other facilities are responding to this issue and balancing risk to staff with risk to patient.
>
> Kind regards,
>
> Fiona De Sousa CICP-E| Nurse Manager | Infection Prevention & Control Unit
> Launceston General Hospital, Level 2, Launceston TAS 7250
> phone: 6777 6715 | mobile: 0408 487 197 | fax: 6777 5170 | email: fiona.de.sousa@ths.tas.gov.au |
> intranet: http://www.dhhs.tas.gov.au/intranet/thon/infection_control
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G’day
Is that a negative pressure theatre to stop any aerosols getting out to the
corridors etc?We are looking at converting a positive pressure theatre to a -15Pa
negative pressure theatre just for Covid19 patients.Our concern is introducing particles from outside to the sterile zone.
Cheers
Lalith Ramachandra
LR Consulting Engineers
for Top End Health Services
PO Box 40968
Casuarina, NT
p 0401117423
e lalith.ramachandra@gmail.com* To Spot the Expert, Pick the One Who Predicts the Job Will Take the
Longest and Cost the Most!*On Wed, 15 Apr 2020 at 11:26, Michael Wishart
wrote:> We have dedicated a specific theatre for COVID-19 cases. There are
> gumboots for staff to wear as part of the PPE for this theatre, and they
> put the gum boots on as part of the PPE and remove them as part of removal
> of PPE.
>
>
> We thought about overshoes for all, but were concerned about staff
> forgetting they had them on and not removing/changing them. Gumboots are
> pretty obvious!
>
>
>
> Cheers
>
> Michael
>
>
>
> *Michael Wishart *| Infection Control Coordinator, CICP-E
>
>
> St Vincents Private Hospital Northside | 627 Rode Road CHERMSIDE QLD
> 4032
>
> *T *+61 7 3326 3068 |* F* +61 7 3607 2226
>
> *E* michael.wishart@svha.org.au |
>
> *W *https://www.svphn.org.au
>
>
>
> [image: cid:image001.jpg@01D46C86.4CDB6090]
>
>
>
> [image: cid:image005.png@01D5C601.F77FEA40]
>
>
>
> *From:* Lynette Cribb
> *Sent:* Wednesday, 15 April 2020 10:56 AM
> *To:* acipclist@acipc.org.au
> *Cc:* Katherine Taylor ; Carien Coleman
> ; Michael Wishart Michael.Wishart@svha.org.au>; ‘Scott McDonald’ Scott.McDonald@healthscope.com.au>
> *Subject:* COVID-19 theatre case
> *Importance:* High
>
>
>
> Morning,
>
>
>
> Just wanting to find out what hospitals are doing around COVID-19 positive
> patients and them going to theatre in particular around the theatre staff
> shoes?
>
>
>
> Any information with regards to this would be greatly appreciated.
>
>
>
> thanks
>
>
>
> *With kind regards,*
>
> *Lynette CribbInfection Control Coordinator*
>
> *Direct *07 3834 4328 |* mobile 0427141223 *| *Fax 0738344599*|* Pager:
> 0328*
>
> *SAWMH.ICC@uchealth.com.au * |
> standrewshospital.com.au
>
>
> [image:
> http://uhcportal.uhc.com.au/Image%20Library/_w/Speaking%20up%20for%20safety%20eSignature_jpg.jpg%5D
>
> [image: cid:image020.png@01D191B3.752D94B0]
>
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You need to refer to HB260.
Generally its 35Pa from the room to the neutral corridor and 15Pa from the anteroom to the neutral corridor.
Cheers
Sent from LR Consulting Engineers
> On 28 Feb 2020, at 6:59 pm, Mary Willimann (Subiaco) wrote:
>
>
> Dear All
>
> Would anyone be able to point me in the direction of guidelines specifying pressure differentials for type 5 isolation rooms.
>
> We have the WA Health Facility Guidelines for Engineering Services (revised 2017) but I was wondering if there were any others that you are using?
>
> Many thanks
> Mary
>
>
> Mary Willimann CIPC-E | Manager Infection Control
> St John of God Subiaco Hospital
> T: (08) 9382 6871 | M: 0439993772 | F: (08) 9382 6785 | E: Mary.Willimann@sjog.org.au
> 12 Salvado Road Subiaco WA 6008 | PO Box 14, Subiaco WA 6904
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Hello Tenneale
There’s some work done by Lewis Johnson on “Evaluation of the Potential for
HAI from Live Plants in a Healthcare Facility”.Basically its to do with the release of mould spores and other plant based
pathogen.Cheers
Lalith Ramachandra
LR Consulting Engineers
for Top End Health Services
PO Box 40968
Casuarina, NT
p 0401117423
e lalith.ramachandra@gmail.com* To Spot the Expert, Pick the One Who Predicts the Job Will Take the
Longest and Cost the Most!*On Wed, 22 Jan 2020 at 07:50, Florence, Tenneale wrote:
>
>
> Hi all,
>
>
>
> Could someone please shine some light or provide recognised resources on
> the reasons as to why it is not deemed appropriate to have pot plants (in
> soil) within a health care setting.
>
> Thank you, Tenneale
>
>
>
> Tenneale Florence
>
> Clinical Nurse Consultant
>
> Infection Prevention and Control
>
>
>
>
>
>
>
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Gday Cathy
If its a Class N isolation room, then there is no issue as you can keep both doors open. If its a quarantine isolation room, then you need the doors to be interlocked.
Its covered in the Australian Standard HB260.
Cheers
Sent from LR Consulting Engineers
> On 19 Dec 2019, at 1:42 pm, Cathy Mowat wrote:
>
>
> Would like some guideance on the requirements for anterooms attached to negative pressure isolation rooms. We are renovating our Critical Care Department and modifying an existing single room into a negative pressure room. The anteroom is not big enough or designed for a bed but rather existing doors straight to the main clinical area will be used for patient movement on a bed if necessary. I cant find any direct reference to the need for the anteroom to be big enough for the bed but as this is how our existing room is configured I need clarification.
> Thanks in advance
>
>
>
>
> Cathy Mowat
> Clinical Nurse Consultant
> Infection Prevention and Control
> Central Gippsland Health
> T. 03 5143 8518
> E. cathy.mowat@cghs.com.au
>
>
> Central Gippsland Health is located on the traditional land of the Gunai Kurnai people
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