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Barry Hunt Profile picture
@BarryHunt008
May 29, 2023 • 31 tweets • 7 min read • Read on X
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Ian Hammomansing introduces the keynote speaker, Dr Stephen Taylor, at #IPAC2023 Image
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Great presentation! 😊

👏👏👏

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More from @BarryHunt008

Barry Hunt Profile picture
Oct 14
Another junk RCT came out

This time claiming "air purifiers don't reduce exposure to viruses in classrooms"

BOLLOCKS Image
1st clue this was going to be a junk study: they did an RCT

Wrong tool

There is no equipoise, no unknown or barely discernible benefit to weigh against likely harm
2nd - Many studies already show cause & effect & mathematically quantify the relationship between exposure levels / reduction levels of pathogens in air and infections

An RCT is two steps backwards at this point

And could be considered unethical
Read 15 tweets
Barry Hunt Profile picture
Oct 5
I learned something new this morning

Inhaled fine particles can cross the alveolar capillary junction into the bloodstream

Where red blood cells can pick up, carry and deposit the particles into organs and tissue cells throughout the body

😳
Sadly, fine particles can be quite toxic

Laden with chemicals and heavy metals

Like particles from vehicle exhaust for example

Including diesel exhaust with toxic particles <1 µm in diameter

link.springer.com/article/10.100…
The fact these particles can directly enter the bloodstream and wreak havoc throughout the body adds a whole new dimension to the issue of air pollution
Read 4 tweets
Barry Hunt Profile picture
Sep 13
I broke a front tooth recently

And needed an extraction and implant

A 2 hour procedure

So off to the oral surgeon I went yesterday Image
Staff were masked

HEPA Air filter was on

I wore my [breathe]2

As usual
For the procedure I donned a filtered nasal CPAP Image
Read 9 tweets
Barry Hunt Profile picture
Sep 11
Important Study from Canada 🇨🇦
👏👏👏

Risk mitigation of shared room ventilation and filtration on SARS-CoV-2 transmission: a multicenter test-negative study | Infection Control &amp; Hospital Epidemiology | Cambridge Core - bit.ly/3Vf0RyX
⬆️ ventilation = ⬇️ Covid HAIs

Increasing from 1 to 6 ACH = 50% reduction
(~40% to 20% attack rate)

Increasing from 6 to 10 ACH = more reduction
(~20% to 10% attack rate) Image
"For each additional ACH, we measured an estimated 12% lower odds of infection, while presence of any RMV carried approximately 50% lower odds."
Read 9 tweets
Barry Hunt Profile picture
Jul 25
Good News!

Canadian Standards Association (CSA) has called for universal respirator use in healthcare settings & when performing patient care outside of healthcare settings (eg – in the home) in the latest edition of CSA Z94.4, Selection, use and care of filtering respirators.
How you can help:

The draft CSA Z94.4 Standard is now out for Public Review until August 19, 2025.

Please weigh in with your positive, constructive comments at .

Public Review comments are open to everyone who registers.publicreview.csa.ca/Home/View/2256…
The draft Standard embodies the Precautionary Principle.

In the absence of risk analysis, N95s are required because healthcare spaces & activities involve daily HCW exposure to Risk Group 2 (RG 2) pathogens like Influenza and RG3 pathogens like SARS-CoV-2, often unknown.
Read 14 tweets
Barry Hunt Profile picture
Jun 8
@alijzimmerman @naner81 @GhostOfSocrates @N0nyM00se @doctor_zeest Thx Alison,

hopefully we can all take the temperature down a few notches, after all, we're all trying to make the system better. 😊

Let's start with 20 ACH Laminar Air Flow (LAF) in ORs. Good idea from the 1960s & generally an improvement over lower airflows.
@alijzimmerman @naner81 @GhostOfSocrates @N0nyM00se @doctor_zeest Does it stop all airborne transmission?

Sadly, no.

Is it the best approach to stopping airborne transmission?

Sadly, no.

Does the medical community think it's the best approach to stop airborne transmission?

Sadly, yes. 😢
@alijzimmerman @naner81 @GhostOfSocrates @N0nyM00se @doctor_zeest First, several systematic reviews and comparative studies have shown that LAF is no more effective than Mixed Ventilation (MV).

Some comparative studies have shown MV to be superior
Read 15 tweets

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