Stopgap Surgical Face Mask (SFM)
This model has been superseded by Stopgap Surgical Face Mask revision B, which was designed to increase comfort. This version may still be used, but see the revision B link for improvements.
This item should only be manufactured in a current Good Manufacturing Practices (cGMP) facility. If this is not manufactured in a cGMP facility under an appropriate quality management system, it should not be used in a clinical setting.
This mask should only be printed with Multi-Jet Fusion (MJF) or Selective Laser Scintering (SLS) technologies out of powder-bed nylon
*** See the Documentation tab for detailed information including the Instructions For Use, Manufacturing Instructions, Bill of Materials, and Test Report ***
This device has not been tested to assess the out-gassing limits of the material or their corresponding health effects.
*** Updates coming ***
We also hope to release at least one other size soon, and expand our filter and cleaning options. Please check this site frequently for updates.
SolidWorks files attached - see Download button
Bill of Materials added to Documentation tab
Manufacturing guidance updated added to Documentation tab
Small size added. Now both small and medium available.
******
The Stopgap Face Mask was created as an emergency action in effort to protect people by providing backup PPE options if the standard PPE has become unavailable. This device has not gone through the same regulatory approval process as standard PPE.
The Stopgap Face Mask consists of two main components (the mask body and the filter cover) and contains features for attaching two elastic straps and receiving a patch of filter material. It is recommended that the rectangular filter patch and elastic straps are disposed of after every use of this device. The remaining parts of the plastic mask can be disinfected using common disinfecting solutions or sterilized and reused.
Many people contributed to this project and we thank them for their dedication and support:
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- Patrick Aubin (Veterans Health Administration)
- Jared Bliss (Veterans Health Administration)
- Brian Burkhardt (Veterans Health Administration)
- Stuart Fairhurst (Veterans Health Administration)
- Joseph Iaquinto (Veterans Health Administration)
- Eli Kaufman (Veterans Health Administration)
- Matt Kindig (Veterans Health Administration)
- William Ledoux (Veterans Health Administration)
- Steve Morin (Veterans Health Administration)
- William Nylander (Veterans Health Administration)
- Chris Richburg (Veterans Health Administration)
- Beth Ripley (Veterans Health Administration)
- Brian Strzelecki (Veterans Health Administration)
- Greg Voss (Veterans Health Administration)
- Matthew Di Prima (Food and Drug Administration)
- James Coburn (Food and Drug Administration)
- Anthony Anderson (University of Washington)
- Lynda Brady (University of Washington)
- Colleen Carroll (University of Washington)
- Alex Hotz (University of Washington)
- Mark Ganter (University of Washington)
- Ian Good (University of Washington)
- Liang He (University of Washington)
- Dalton Hildreth (University of Washington)
- Yuri Hudak (University of Washington)
- William Lack (University of Washington)
- Jing-Sheng Li (University of Washington)
- Dmitry Levin (University of Washington)
- Jeffrey Lipton (University of Washington)
- Kelly Mack (University of Washington)
- Jen Mankoff (University of Washington)
- Connor Mulcahy (University of Washington)
- Alshakim Nelson PHD (University of Washington)
- Monica Ortiz (University of Washington)
- Jonathan Posner (University of Washington)
- Annie Ross (University of Washington)
- Anastasia Schaadhardt (University of Washington)
- Adriana Schultz (University of Washington)
- Anne Turner (University of Washington)
- Megan Hofmann (Carnegie Mellon)
- Scott Hudson (Carnegie Mellon)
- Jim McCann(Carnegie Mellon)
- Aidan Fay (Stanford University)
- Elizabeth Foster (3D Systems Healthcare)
- Benjamin Johnson (3D Systems Healthcare)
- Shelby Marks (3D Systems Healthcare)
- Jacob Ames (Hawk Ridge Systems)
- Brandon Boulden (Hawk Ridge Systems)
- Tristan Butler (Hawk Ridge Systems)
- Mark Dolinar (Hawk Ridge Systems)
- Matthew Fisher (Hawk Ridge Systems)
- Devin Johnson (Hawk Ridge Systems)
- Jack Aubin
- Kavi Dey
- Caitilynn Larmore
- Kelly Richburg
- Sherry Sellentin (Pacific Fabrics and Crafts)
- Kathie Varney (Pacific Fabrics and Crafts)
- Karen Grosh (Pacific Fabrics and Crafts)
Comments
3dmaker
Thu, 2020-04-16 05:46
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Fusion 360 files
I too would really, really appreciate the Fusion 360 files. I intend to make alternative PETG masks for French firemen/paramedics using consumer-grade Creality printers.
Having a design we can slightly adapt to our equiment AND print with a standard 3D printer would be absolutely fantastic.
cpeahl256
Thu, 2020-04-16 08:48
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Downloading CAD Files
Is anyone else having trouble downloading the CAD files? I can't seem to make the download work. Appreciate any feedback.
CoronaResister
Thu, 2020-04-16 17:36
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Editing file
I am trying to print this mask for my sister who works as a pharm tech and I am worried about her. When I shrink it to 78% (her size) the wall thickness becomes 0.8mm instead of 1.2mm and it doesn't print right around the vent areas. (I 3D print a lot and still couldn't fix that) Also the airflow is retricted when using MERV 16 air filter inserts (Close to n95 filtering I think) I really need to edit this file but I don't have solidworks 2019 or 2020 that it was made in. Can you (or someone) save the solidworks files (all 3 files please) as parasolids so I can run FeatureWorks on them on my SoildWorks 2018 software to make it editable? (I have a license through my work on my work machine) I know you can't save a .SLDPRT file as an eariler version. Big thank you in advance.
Brad Baker
Fri, 2020-04-17 09:59
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Work in progress on this design
This is a great design and we made a short video showing it the overall mask including a few suggestions for considerations: https://youtu.be/bb0QTnPhD8c
We are currently doing the following with this design:
- We are already on rev3 of our re-design whis is predominanly focused on making the mask more suited for 3D printing (specifically SLA but possibly FDM as well). We have moved the cartridge to the inside to make the front surface flat and we have changed the strap anchors as well.
- We are working with a major SLA vendor to print on this on their surgical grade resins and we should have results very soon (probably today 4/17/20).
- There is also some governmental R&D interest, but I will not go into that until I discuss it with my contacts.
I think this is a very good design and worth continued consideration.
Benjamin Holmgren
Fri, 2020-04-17 19:20
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Cad Files
When I try and download the provided cad files, I just get a huge text document in my browser. anyone else experiencing this or have an idea on how to fix it? thanks!
Benjamin Holmgren
Fri, 2020-04-17 19:23
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Cad Files
The link for the cad files isn't working for me. it just shows a huge text document. Does anyone have an idea on how to fix this?
jazzjensen
Sun, 2020-04-19 11:28
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Solid Works files?
In the Downloads section, I see several Parametric files, but when I click on them, they don't download like the other files listed there. It looks like the sourcecode (looks like dingbats) loads to the Window instead. Has anyone else been able to download the Parametric .sldprt files? or perhaps the link is broken?
phil_mercurio
Wed, 2020-04-22 14:48
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+1 for large model
I've printed several of these out for family and friends, in PLA with supports and using a cut-up HEPA filter as filter material. I'd just like to add my +1 for a large-size model, medium is a bit tight for adult males.
Thanks so much for making these models available!
phil_mercurio
Wed, 2020-04-22 14:52
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Cotton squares as filter material
As an alternate filter material we've used quilted cotton squares, available at grocery stores for less than a penny each (I believe their primary use is for removing makeup). Cheap enough to be disposed of after one use, and probably at least as good as a rag mask. Not quite as easy to breathe through as a HEPA filter, though.
KikiKamikazi
Wed, 2020-04-22 19:28
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Wanted file where I could make changes to design in solidworks
Hi Chris,
My name is Victoria, nice to meet you! First off, I want to thank you and anyone else involved with the designing of this mask. Surely this will provide those who work in the medical field a safe alternative to the standard medical PPE that is currently in short supply. I see you have had quite a few others ask you already for a file they could alter themselves on CAD. I too would like a copy of these files.
I have been working on a few ideas for the mask and wanted to test them out. I have printed out a medium and small mask. Both came out good. I was going to try using the copper3D MDflex filament I have seen a lot people talking about. Apparently, it has been scientifically validated to eliminate 99.99% of fungi, viruses, and bacteria. One of the things I was working on in Solidworks was a detachable rim that will be made using TPU MDflex filament - which is supposed to be more rubbery/flexible, in hopes that it would make wearing the mask for prolonged periods more comfortable. Then the actual mask itself I was going to print using copper3D PLA.
I wanted to print this mask for a few of my family members who work in nursing homes. They have been forced to use the same disposable surgical masks, so I told them I would print them out masks they can wash and reuse. When you get a chance can you upload or send me whatever version of the file needed to make modifications to the design for Solidworks? It would be greatly appreciated.
Best Regards,
Victoria
pviaud
Sat, 2020-04-25 23:28
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Biocompatible TPU
Chris, we printed masks in PA12 and also tested in flexible TPU (SLS and MJF). TPU greatly improves sealing and comfort, while also being sterilizable. Are there plans to add TPU to the list of approved materials? Thanks
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