I'm a doctor in Connecticut trying to use my 3D printers to help fight COVID.

This is a frame and tutorial for how to make a high filtration mask from blue operating room tray material called Halyard H600. Youtube: https://youtu.be/xVYypLYEo_0

This is now NIH approved for community use: https://3dprint.nih.gov/discover/3DPX-013690

GoFundMe: https://www.gofundme.com/f/doctors-3d-printing-masks

ATTENTION: The main file in the pack is called "CEG_REGULAR.stl"

It is an adaptation of a mask sewn from this material proposed by Dr. Bruce D Spiess. Manufacturer details provide that it filters 99.9% of 0.3 micron materials, making it better than n95, and it is readily available in hospitals.

See Dr. Spiess' tutorial: https://ufhealth.org/news/2020/uf-health-anesthesiology-team-devises-respirator-mask-made-existing-hospital-materials

What we did at the Musculoskeletal Institute at UCONN, was to adapt a face frame to allow 1 or 2 layers of this material to be pressed to your face instead of sewing it, if you have a 3D printer. Files are open source and you may use it non-commercially to make these masks, per your hospital policy, given the CDC relaxed guidelines for homemade masks.

Please let me know any ideas for mods or improvements and I will do my best to address them.

Christopher Wiles, DO - Anesthesiology
Augustus D. Mazzocca, M.S., MD - Orthopedic Surgery & Bioskills
Elifho Obopilwe - UConn Musculoskeletal Institute

Thank You:
Bruce Spiess, MD FAHA - UF Department Anesthesiolgy
Michael Baldwin, MD, UConn Radiology
Jason Hancock, PhD, UConn Physics
Cindy Polinsky, Executive Director UCHC-AAUP
Joseph Luciani, Director, Proof of Concept Center, UConn
UConn, Hartford Hospital & St. Francis Medicine Residents
Orthopedic Surgery Fellows
Sean London, MD, Emergency Medicine
Ideas and input from many other
Original face frame idea was from 2ROBOTGUY, thing:4231792, thanks so much for your work on this idea! I'm excited to apply it to this specific material and make a difference.

Disclaimer: These designs represent my own ideas, not an institution's.
The efficacy of this mask exoskeleton is not guaranteed. This is a
concept for emergency use only and as a last resort. It does not
replace approved masks. Use as you see fit, with no guarantees.

4/7/20 Update: for an alternative to phlebotomy tourniquets, and if elastic straps are in short supply, see this cleaver idea by kelkelkelvin to use 3D printed clips and a chain of hair ties for the straps instead: https://www.thingiverse.com/thing:4266669

4/7/20 Update: not all filament is created equal. Certain filaments are too brittle and cannot handle the flexing at the nose bridge as much. We prefer the the original thin frame (1.0 mm) as our PLA is flexible and not brittle, but have added a 20% thicker (1.2 mm) version to combat filament brittleness. Please give feedback about which works better for you, or if you prefer other filaments such as PETG.

4/13/20 Update: "CEG Extreme Fusion CAD file.f3d" added. Thank you to Everett from Nevada!

4/20/20 Update: "Small n95 Frame" file added. I found a new face height (100mm) that worked to seal a surgical mask and an n95 to the face of one of our residents who typically requires a small n95. This fitment was requested by multiple Boston hospitals facing a shortage of size small n95s to adapt normal sized n95s to faces.

4/27/20 Update: "Small n95 Frame" has been made thinner. instead of 2.0mm it is now 1.2mm so it can flex over the face better.