5 ms·

Apparently this is related to their ProtectivAir device: https://medi-immune.com/protectivair/ https://medi-immune.com/protectivair/ An actual article where th

Apparently this is related to their ProtectivAir device: https://medi-immune.com/protectivair/ https://medi-immune.com/protectivair/ An actual article where the link came from: https://www.ptcommunity.com/wire/revolutionary-breathing-device-offers-likely-solution-covid-19-pandemic https://www.ptcommunity.com/wire/revolutionary-breathing-dev...

Gibbon1 7y ago
That seems a reasonable and cheap device. An improvement might be to sterilize the exhaled air as well.
- nikolay 7y ago
  That's a great idea. I hope somebody makes mass production of these. The disposable respirators are expensive (in the log run) and lead to pollution. At the end, for medical reasons, we just want germs to be inactivated. I wonder if this kills fungi as well, but I doubt it would do anything to fungal spores, but for those maybe a washable filter could be used.
  - Gibbon1 7y ago
    I know just a little about sterilization. Because I worked on controls for sterilizers. As a general problem killing spores is what's hard. With gas sterilization they 'precondition' product at 120 degrees and 80% humidity in order to encourage spores to activate. With CO60 gamma radiation the product comes out a bit warm. Steam sterilization is done at 258 degF. You get the idea. Compared to spores influenza type viruses are trivial to kill.
    - nikolay 7y ago
      Do you know what's the diameter of the spores? There's so much about reusing masks [0], but I read nowhere about the fungi concerns. Respirators can be breeding grounds for fungi when they get damp, and even though with N95 you can breathe them in, most probably, I'm sure they release toxic fumes. Fungi can "eat" pretty much anything - if they can live on stones and find "food" there, I'm sure there's enough "food" for them in the reused masks as well. [0]: https://www.n95decon.org/ https://www.n95decon.org/

Gibbon1 7y ago

That seems a reasonable and cheap device. An improvement might be to sterilize the exhaled air as well.

nikolay 7y ago
That's a great idea. I hope somebody makes mass production of these. The disposable respirators are expensive (in the log run) and lead to pollution. At the end, for medical reasons, we just want germs to be inactivated. I wonder if this kills fungi as well, but I doubt it would do anything to fungal spores, but for those maybe a washable filter could be used.
- Gibbon1 7y ago
  I know just a little about sterilization. Because I worked on controls for sterilizers. As a general problem killing spores is what's hard. With gas sterilization they 'precondition' product at 120 degrees and 80% humidity in order to encourage spores to activate. With CO60 gamma radiation the product comes out a bit warm. Steam sterilization is done at 258 degF. You get the idea. Compared to spores influenza type viruses are trivial to kill.
  - nikolay 7y ago
    Do you know what's the diameter of the spores? There's so much about reusing masks [0], but I read nowhere about the fungi concerns. Respirators can be breeding grounds for fungi when they get damp, and even though with N95 you can breathe them in, most probably, I'm sure they release toxic fumes. Fungi can "eat" pretty much anything - if they can live on stones and find "food" there, I'm sure there's enough "food" for them in the reused masks as well. [0]: https://www.n95decon.org/ https://www.n95decon.org/