Increase Respirator/N95 mask effectiveness

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  • Thu, Mar 26, 2020 - 02:48am

    #11
    grax

    grax

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    Increase Respirator/N95 mask effectiveness

Hi,

I am grax, I am an engineer,

it would be good if one day -hopefully before human extinction- a mixed community of biologist, engineers, industrials (or even smart people having good ideas) could work together to find alternative approach to create a better mask

Imagine an 100$ “active” mask, 100%SAFE more comfortable/practical of these middle-age 10$ low-tech “piece of tissue” N95/FFP2 that our doctors are using now which  even prevent them to breath comfortably, are not totally safe and must be changed each 5 hours

What about an integral face mask integrating a 1-inch thick salt-filter (virus killer) where air is pumped in using a simple 2bar mini-compressor (5$ 1-inch3) battery powered?

the external compressor would create a slightly positive air-pressure inside the mask (1.2bar) so air would always escape out of the mask at same time allowing doctors to breath normally

The salt-filter should cost 10 cents, it would be in the for of a cartridge and could be replaced very easily after (x) hours of use and add all electronics stuff to controll pressure, temperature, ear/talk

Last.

I would be great that such project would be no-profit open-source.

Many doctors died already and other risk their life exposed each day to COVID while trying to save lives; they don’t do it for money …. ethics is a much higher class than business

Has anyone the scientific background to study the details of this “salt-filter” or move this discussion at the attention of the right table? all other pieces are already available in the industry

best

g

  • Sat, Mar 28, 2020 - 09:33am

    #12
    jupura

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    Increase Respirator/N95 mask effectiveness

Not sure if this belongs here but it would be great if the news on this took hold.

Researchers at Duke are sterilizing and reusing face masks with hydrogen peroxide:

Monte Brown, vice president at Duke University Health System, said the Duke team is working to spread the word about the technique, making the protocols widely available. He said several health systems and many pharmaceutical companies already have the needed equipment, which is currently used in different ways, and could ramp up operations to come to the aid of their local hospitals.

“We could stand up in front of our staff and state with confidence that we are using a proven decontamination method,” Brown said. “It has been a proven method for years. While this alone will not solve the problem, if we and others can reuse masks even once or twice, that would be a huge benefit given the current shortage

Researchers Have Found a Way to Sterilize and Reuse Face Masks During Pandemic

  • Sat, Mar 28, 2020 - 09:42am

    #13
    jupura

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    Increase Respirator/N95 mask effectiveness

And I have a question to anyone. If salt kills the virus then why not just put the N95 mask in a big bucket of table salt to decontaminate it?  Who out there knows?

  • Sat, Mar 28, 2020 - 10:04am

    #14

    dtrammel

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    Salt is just a minor additive

I am grax, I am an engineer.

As much as I love engineers, why is their first thought to stick a battery and a fan on everything? Not every problem needs a more complicated answer.

Good old paper masks are a wonderful low tech solution to a low tech problem. Stuff in the air we don’t want to breath. No fans to break down, no batteries to stock up on. Can sit on a shelf for years and still do the job.

Researchers at Duke are sterilizing and reusing face masks with hydrogen peroxide:

Jupura, did you read what it takes to do that “tried and true” method? Its a big machine which uses vaporized hydrogen peroxide and then recycles (or just disposes of) the hydrogen peroxide. What do you guess that machine costs?

Want to guess who probably owns the patent on that device? Or who profits from its increased use?

Not very cost effective except in large medical centers or hospitals. You know what is cost effective and is in almost every home? An oven. Heat of 170F for 30 minutes has been shown to not only kill the virus but do almost no material damage.

Not saying Duke’s announcement isn’t important but it doesn’t deserve the hype that its getting.

And I have a question to anyone. If salt kills the virus then why not just put the N95 mask in a big bucket of table salt to decontaminate it?  Who out there knows?

Salt doesn’t kill the virus, it dries out the oily fat layer that encapsulates the virus particle, exposing it to the air and then allowing it to die. Its not some miracle cure for filtration and mask efficiency.

A big part of how a mask works is just simple filtration. The weave of the material literally traps the virus particles, which are much larger than the oxygen and air molecules. A secondary action is something called “electro-static” which means that the mask fabric has a slight charge to it, and attracts the airborne virus particles to the weave of the material. Soaking in a super saturated solution of salt and water helps increase that charge, and then increases the effect but its not a game changer.

Now it probably is a good additional step in the many DIY masks and their filter inserts. Giving the typical two layers of cotton an electrostatic charge probably would help their filtration effect.

  • Mon, Mar 30, 2020 - 12:03pm

    #15
    mountain_man007

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    Reply To: Increase Respirator/N95 mask effectiveness

Because of the terrible, horrible pre-planning (or lack thereof) of our pandemic response in the US we are in a disastrous situation. Not having proper PPE for even our healthcare workers has and will continue to lead to a drastically reduced capacity, not to mention hundreds or thousands of deaths.

I know there have been news reports in recent days of groups that are now working to mass-sterilize used respirators. Maybe we can learn something useful from them.

We also have the inexplicable problem of “mask stigma” due to the CDC and government guidance on masks and shortages. On this, I have experienced it via comments made by people while in public, at the store, etc. I love the idea at the end of Chris’ 3/29 video to wear a bandana over your N95. Not to ‘look cool’, but to hide the N95 from view of others. This is so sad that it has come to this. How will we ever get to the point of #masks4all after this? Wearing a mask will become a necessary part of rebuilding social trust. My other thought (before the bandana covering idea) was to wear a sign with the Czech’s slogan “My mask protects you. Your mask protects me.” Of course for my area I’d have to add “Where the hell is your mask??” to it.

There are still many public health officials on TV putting out the message that you’re basically a terrible person if you are out wearing some type of mask. Idiocy. Insanity. And it must be overcome.

Wearing some (any!) kind of face covering will accomplish many of the goals here. Everyday people wearing homemade coverings will not take away from healthcare workers. Why are we not seeing this message instead of the “masks dont work and you’re a bad person for even thinking that” BS coming from CDC & states? It’s so frustrating. I know we all here share that frustration, and this might not have been the place for it but I needed to rant.

Thanks to those who are testing out the salt improvement (and other) methods and sharing their results with us.

 

Face Masks for All

https://youtu.be/qFmaSNP6_z4

  • Sun, Apr 05, 2020 - 03:50pm

    #16
    Dhosie

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    Increase Respirator/N95 mask effectiveness

Stamford University recently conducted some testing on the effects of mask sterilization techniques. Link on this page

https://www.covakill.com/faqs

 

  • Tue, Apr 07, 2020 - 02:10am

    #17
    grax

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    Increase Respirator/N95 mask effectiveness

a 100$ personal mask, covering the whole face, is the only solution and would be simple to create with  the right tech people working on it

DYI sterilization techniques cannot be used cause only a machine can guarantee 100% that mask is correctly sanitized …

Paper mask KN95? FFPx are a not totally sure cause in many cases external AIR ENTERS from the edges (try it) …. once size fit’s all doesn’t work in this case, we are not talking about a pair of shoes, Virus have nanometer size

Paper mask are middle-age solution but industry is incapable to react with ideas

 

 

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