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Lazarus Long Profile picture
@LazarusLong13
Jan 5, 2022 • 10 tweets • 5 min read • Read on X
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A quick thread on why elastomeric respirators are better than N95's.

In short? Like N95/N99 disposables are better than surgical/cloth masks?

Primarily, fit. Not that fit 👇👇.

How it fits to your face.

For a number of different reasons that may surprise you.
First off, getting the respirator to actually fit to your face.

Not all facial geometries are the same.

The Fit Test Panels used to evaluate fit, I submit, do not have enough women or Asians.

Archived the pdf here:
web.archive.org/web/2022010510…

Study here:
tandfonline.com/doi/abs/10.108…
So, no surprise that with N95 disposables that 👇👇

High - level:
web.archive.org/web/2021082422…

Direct Study Link:
web.archive.org/web/2021020313…
web.archive.org/web/2021082422… Image
Do elastomerics fit easier? Yes - because of the elastomeric material (another way of saying 'rubber-like', but usually made of medical grade silicone.

So when comparing the two, we find a huge difference:

With 60 subjects from the ASA, 98% of elastomerics passed fit testing Image
versus 57% of disposables.

And the single failed fit test for the elasto's? She switched from a medium to a small and passed.

web.archive.org/web/2021020313… Image
In this next study:
jamanetwork.com/journals/jama/…

87% of participants had experience with elastomerics or disposables.

Only 1.3% had experience with elastos.

So, they were largely experienced at wearing N95's.
Yet, after watching just a 9 minute video, 92% were able to successfully fit the elastos's vs 88.5% in the N95's that they were experienced at.

Let's move on.

Speaking of movement, elastomerics keep their fit much better during movement.

Do you move during your job? Cook?
Clean? Do things as manually involved as CPR?

Then you will want an elasto.

In jamanetwork.com/journals/jaman…

N95's performance during CPR was poor. (Filtering Face piece Respirator 👇).

But elastomeric half-mask respirators' (EHMRs) performance was high.

This study confirmed Image
this next study, that CPR causes N95's to lose fit.

Their conclusion is stark and very real.

sciencedirect.com/science/articl… Image
Let's end on a light note.

Elastomeric respirators?

They let you keep fit and having fun!

With clean lungs!

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More from @LazarusLong13

Lazarus Long Profile picture
Jun 28
Hi Mr. Shapiro, @ishapiro of @ManhattanInst.

I am an immunocompromised Clean Air Advocate in my spare time, and I'd like to walk through your provided statement, and address your valid concerns. Image
Unless I am reading you incorrectly, you firmly support free speech, including that of wishing to listen. (I love that - so often overlooked).

Roughly 12% of America is still masking per the latest poll.




. city-journal.org/article/from-h…
manhattan.institute/article/amicus…
yahoo.com/lifestyle/only…
Image
That poll is the latest poll from September 2023. You probably would not have thought that less than a year ago, right? That's because the Covid Cautious tend to avoid crowds.

But we have a first amendment right to go and protest, or listen - as you have pointed out.
Read 26 tweets
Lazarus Long Profile picture
Jun 27
The USDA is going with fomites, @Alexander_Tin @RickABright

Notice that word 👇- masks.

Masks are for droplets and fomites. Respirators are for aerosols.

Is there a possibility of this being an incorrect usage of the word mask? Could be. I doubt it.

Too many eyes on
Image
this.

Let me point out for new followers that a dirty surface is called a fomite. The contaminating particles can also be called fomites.

Until they are sprayed/splashed up and become aerosols.

Fomites are just aerosols waiting to happen. And visa versa.
In this most recent study, recommending masks, they gave no discussion of the immune system of the udder - truly formidable, and a fascinating read.

Nor compared it to the relatively defenseless LRT immune system. ("Relatively" stressed due to alveoli macrophages, etc).
Read 16 tweets
Lazarus Long Profile picture
Jun 23
Black head-straps on a black respirator.

Black shirt, black tie, black belt, black shoes.

A black Luca Mosca suit, and John Wick is back.

We can't all afford to wear Luca Mosca.

But most of us can afford the respirator. 🧵

thegentlemansjournal.com/article/story-…
Image
The respirator is the black Laianzhi HYX1002, an excellent Chinese KN100 and FFP3 (think N99).

There are no Amazon knock-off issues here as the online store has a direct line to the manufacturer - evidently, a reputable company.
Image
Image
I am immunocompromised, so I take what I breathe in as seriously as Mr. Wick takes his suits and guns.

This is an excellent respirator with an amazingly wide nose latex foam that makes each one almost a bespoke respirator.

The nose wire is luxuriously thick.
Image
Image
Read 16 tweets
Lazarus Long Profile picture
Jun 19
We've talked about masking in
Taiwan and South Korea 👇.

This 🧵 is not that story.

This is the story of Japan - the story that you have not heard.

Badass samurai in an N95, just slicing g SARS2 out of the air.
Business man in surgical mask.
Everyone has always assumed that the Japanese have masked as a whole society for ages.

That is simply not true - I lived in Tokyo for a few years. There were some thoughtful people in masks.

They would mask so as not to infect others.

Generally, it's expected. 1 child in mask, 2 not
Here in the west, the CDC recommends Respiratory Etiquette. Which belongs in the 1770s in terms of efficacy. It's a joke.

But the concept of not infecting others is actually at the heart of it.

Read 25 tweets
Lazarus Long Profile picture
Jun 17
You've heard of masking in Japan, China, and South Korea 👇.

This 🧵 is not that story.

This is the story of Taiwan - and then a very important consideration for Canada and the USA.
Image
The story begins under Japanese rule (1895-1945 ).

During that time, Taiwan established its modern public health system - and Japan influenced it.

In fact, the public health system was developed specifically because of epidemics. To stop them.

nhi.gov.tw/en/cp-80-d5357…
Image
From the newspapers of the time, a masking cartoon.

Side note...I had alt text for all the pics. @elonmusk's POS app refuses to send the rest of this thread, so I am not resurrecting Alt text, as I am having to do this manually. Image
Read 21 tweets
Lazarus Long Profile picture
Jun 15
Worried about H5N1? Get in the habit of using a food thermometer.

Whole beef cuts: 145°F
Ground beef: 160°F
Chicken, Eggs, Pork: 165°F

Pork was surprisingly hard to run down. Found it below.

Dog meat not discussed. Even our science is biased.

academia.edu/download/64909…
Great points!

Looks like scholar Google has it cached.

Click on the PDF edu link and save it. 674 pages of Avian Influenza.


scholar.google.com/scholar?hl=en&…
Read 4 tweets

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