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Introduction |
Bunny Science PAPR by Guy Kuo, MD Anesthesiologist.
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a hooded Sealed Fit Compliant Volume PAPR. It protects against aerosol, droplet, and splash threat from all directions.
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• Bunny Science PAPR isolates user via positive pressure instead of requiring a perfect face to mask seal.
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Masks need a perfect facial seal for protection against aerosolized threat. Some people simply cannot use an N95 mask because they cannot avoid leaks. PAPR's avoid this usage pitfall.
[ … ]
• Bunny Science PAPR extends use of approved, viral filters. These are ubiquitous in the operating room setting and provide N99 filtering for patients.
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Design Highlights
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* Provide clean breathing air via FDA approved, ventilator viral filter or medical air/oxygen
* Protect entire head and face against airborne and splash risks
* Use positive pressure to maintain protection even without a perfect seal
* Dramatically lower airflow requirements than traditional PAPRs
* Use disposables that are readily available
* Buildable even with limitations of FDM 3D parts.
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Hood is a polyethylene bag placed over head and secured around neck. Breathable environment is at positive pressure. Expiration ports are unidirectional flow valves or additional output filters.
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Fan Powered Filtered PAPR - Full PAPR by drawing room air through anesthesia viral filter via a fan. Fan is powered by 12 volt battery pack or AC adapter.
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Developmental Testing
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The Bunny PAPR has been tested at my hospital against nebulized N95 test aerosols for proper isolation. To simulate worst case test conditions, test aerosol was directed at air intake, exhausts, and neck seal. Although, this is not identical to NaCl challenge, there is no logical reason to require re-testing of filters already accepted by FDA as having 99.99% viral filtering.
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Physiologic monitoring for CO2 clearance, oxygen saturation, and respiratory rate was verified as sustainable using OR patient monitor and continuous gas sampling analysis. User ability to wear system for 11 hours was confirmed. Wearer has ability to carry out typical operating room procedures, intubate, extubate, monitor, fill out EHR, walk and push gurneys.
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Main Project Page
https://bunnyscience.dozuki.com/Guide/Bunny+Science+PAPR/4?lang=en
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Preparation for Wear
https://youtu.be/NXW0xUPl0_c
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Detailed use and assembly video
https://youtu.be/JMXP8jAmDKA
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BunnyPAPR Playlist
https://www.youtube.com/playlist?list=PL4D2lchZjkr4RzdM9kuF6EGZMYyIZ4cg2
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Most Recent 3D parts files...
https://www.thingiverse.com/thing:4243272
or
https://www.prusaprinters.org/prints/27657-bunny-science-papr
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The Bunny Science PAPR is not yet a regulatory approved device. Use of this PAPR respirator is at your sole discretion and risk.''
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Project is released under Creative Commons Attribution-NonCommercial-NoDerivs CC BY-NC-ND.
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Art Credit: Generic human head model by John Brown.
Bunny Science PAPR by Guy Kuo, MD Anesthesiologist.
[ … ]
a hooded Sealed Fit Compliant Volume PAPR. It protects against aerosol, droplet, and splash threat from all directions.
[ … ]
• Bunny Science PAPR isolates user via positive pressure instead of requiring a perfect face to mask seal.
[ … ]
Masks need a perfect facial seal for protection against aerosolized threat. Some people simply cannot use an N95 mask because they cannot avoid leaks. PAPR's avoid this usage pitfall.
[ … ]
• Bunny Science PAPR extends use of approved, viral filters. These are ubiquitous in the operating room setting and provide N99 filtering for patients.
[ … ]
Design Highlights
[ … ]
* Provide clean breathing air via FDA approved, ventilator viral filter or medical air/oxygen
* Protect entire head and face against airborne and splash risks
* Use positive pressure to maintain protection even without a perfect seal
* Dramatically lower airflow requirements than traditional PAPRs
* Use disposables that are readily available
* Buildable even with limitations of FDM 3D parts.
[ … ]
Hood is a polyethylene bag placed over head and secured around neck. Breathable environment is at positive pressure. Expiration ports are unidirectional flow valves or additional output filters.
[ … ]
Fan Powered Filtered PAPR - Full PAPR by drawing room air through anesthesia viral filter via a fan. Fan is powered by 12 volt battery pack or AC adapter.
[ … ]
Developmental Testing
[ … ]
The Bunny PAPR has been tested at my hospital against nebulized N95 test aerosols for proper isolation. To simulate worst case test conditions, test aerosol was directed at air intake, exhausts, and neck seal. Although, this is not identical to NaCl challenge, there is no logical reason to require re-testing of filters already accepted by FDA as having 99.99% viral filtering.
[ … ]
Physiologic monitoring for CO2 clearance, oxygen saturation, and respiratory rate was verified as sustainable using OR patient monitor and continuous gas sampling analysis. User ability to wear system for 11 hours was confirmed. Wearer has ability to carry out typical operating room procedures, intubate, extubate, monitor, fill out EHR, walk and push gurneys.
[ … ]
Main Project Page
https://bunnyscience.dozuki.com/Guide/Bunny+Science+PAPR/4?lang=en
[ … ]
Preparation for Wear
https://youtu.be/NXW0xUPl0_c
[ … ]
Detailed use and assembly video
https://youtu.be/JMXP8jAmDKA
[ … ]
BunnyPAPR Playlist
https://www.youtube.com/playlist?list=PL4D2lchZjkr4RzdM9kuF6EGZMYyIZ4cg2
[ … ]
Most Recent 3D parts files...
https://www.thingiverse.com/thing:4243272
or
https://www.prusaprinters.org/prints/27657-bunny-science-papr
[ … ]
The Bunny Science PAPR is not yet a regulatory approved device. Use of this PAPR respirator is at your sole discretion and risk.''
[ … ]
Project is released under Creative Commons Attribution-NonCommercial-NoDerivs CC BY-NC-ND.
[ … ]
Art Credit: Generic human head model by John Brown.
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