• Welcome to ScubaBoard


  1. Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.

    Benefits of registering include

    • Ability to post and comment on topics and discussions.
    • A Free photo gallery to share your dive photos with the world.
    • You can make this box go away

    Joining is quick and easy. Login or Register now by clicking on the button

Full face masks for COVID-19 therapy

Discussion in 'Fins, Masks and Snorkels' started by Angelo Farina, Mar 24, 2020.

  1. pointy

    pointy Angel Fish

    18
    10
    3
    Being intubated exposes a patient to avoidable risks if non-invasive ventilation could work for him. As Angelo conceded, this would not be a solution for the sickest patients, but it might help to increase overall survival. It could also be used with more basic, and plentiful, ventilators (Bipap machines) at a time when hospitals would need to make the best use of all their equipment.

    I think you also have to consider the ethics of intubating a patient for infection control purposes (efficient filtering of exhaled gases) rather than for what would give him his
    best chance for survival.
     
  2. pointy

    pointy Angel Fish

    18
    10
    3
    Great idea Angelo.
    Is it possible to autoclave or otherwise decontaminate this DIY interface? Which brands of snorkel mask could be fitted to your printed manifold? Do you know anyone who could make and supply this part? Would you be willing to share plans and instructions with those who are equipped to make this part for themselves?
     
  3. lowviz

    lowviz Solo Diver ScubaBoard Supporter

    # of Dives: 200 - 499
    Location: Northern Delaware or the New Jersey Turnpike
    6,863
    3,533
    113
    AND it frees up a Ferrari ventilator for someone who really needs it...
     
  4. Angelo Farina

    Angelo Farina Marine Scientist

    # of Dives: 1,000 - 2,499
    Location: Parma, ITALY
    581
    828
    93
    The 3D printing workshop who create the parts need for modifications is here:
    Easy – Covid19 ENG | Isinnova
    You can download the STP 3D model form this page and print it yourself.
    The mask is the one by Decathlon, the larger sport equipment reseller here on Italy (I suppose in Europe), who has his own line of scuba and snorkeling products.
    These masks are inexpensive (19.99 €): MASCHERE,BOCCAGLI SNORKELING - Maschera SNORKELING EASYBREATH
    So when it is time to clean, it is easier and cheaper to dispose it and use another...
     
  5. Altamira

    Altamira Loggerhead Turtle

    # of Dives: 200 - 499
    Location: Canyon Lake, TX
    1,731
    1,574
    113
    I wonder if our medical community is aware of this potential work around for a proper ventilator. Realizing that it would not be appropriate for all situations, but if it has the potential to save lives, I hope those that have some expertise in this setup can break through the bureaucracy in our "we know it all" government.
     
  6. pointy

    pointy Angel Fish

    18
    10
    3
    Thanks for all of this. I'll pass this info along to some people over here might who might put it to good use.
    Also, I was wondering if you used this rig to provide CPAP to spontaneously breathing patients connected to high flow gas from a blender; Or is it best used as an NIV interface?
     
  7. Angelo Farina

    Angelo Farina Marine Scientist

    # of Dives: 1,000 - 2,499
    Location: Parma, ITALY
    581
    828
    93
    I am an engineer, not a medical doctor. So better if you make these questions to the guys who actually invented this modification. Their names are on the web page I have linked...
    They hope that this can save lifes also outside their hospital, and this is the reason for which they published the STL files and the instructions for making the modification.
    If the Decathlon (Subea) brand is not available in the USA, you can probably adapt the concept to low-cost snorkeling masks available there.
     
  8. lowwall

    lowwall Manta Ray

    # of Dives: 200 - 499
    Location: Chicago
    625
    448
    63
    As long as they don't use them for snorkeling...

    Seriously, the thing that makes them useful here - airtight and difficult to remove - should disqualify them for use as snorkeling equipment. The positive pressure from the oxygen machine presumably solves the remaining issue of dead air space allowing CO2 buildup.
     
  9. Angelo Farina

    Angelo Farina Marine Scientist

    # of Dives: 1,000 - 2,499
    Location: Parma, ITALY
    581
    828
    93
    CO2 buildup is a good thing for a patient with respiratory insufficiency, as it stimulates the breathing reflex.
    In fact a special gas, called Carbgen, is used during anesthesy: it is pure oxygen with a 5% CO2: CARBON DIOXIDE 5%/ OXYGEN MEDICAL GAS MIXTURE | Drugs.com
     
    woodcarver likes this.
  10. Angelo Farina

    Angelo Farina Marine Scientist

    # of Dives: 1,000 - 2,499
    Location: Parma, ITALY
    581
    828
    93
    In reality these Decathlon masks are well designed for snorkeling. They have two internal chambers, separated by a set of one-way valves. Fresh air is inhaled form the snorkel and enter the upper chamber, with a nice defogging effect on the glass. Then the fresh air passes through the valves in the lower chamber, where there are mouth and nostrils. So you inhale from the low-volume lower chamber. When you exhale, the air cannot go up in the much larger upper chamber, and is forced to exit into the water through the front exhaust valve.
    So the CO2 buildup is minimal, as the volume of the lower chamber is comparable to that of a normal snorkel.
     

Share This Page