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Changes to Bunny Science™ PAPR Introduction

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Introduction
Bunny Science HALO Respirator design by Guy Kuo, MD Anesthesiologist. [ … ] a mask nor face shield, mask, but a full protective PAPR (Powered Air Purifying Respirator). It solves issues that plague not only DIY masks but also commercial N95 masks. extends utility of already FDA approved anesthesia viral filters to create a highly protective PAPR. As a full head covering PAPR, it protects both aerosol, droplet, and splash threat from all directions. [ … ] 1. Perfect face fit requirement: A mask which does not form Bunny Science Halo PAPR isolates user via positive pressure instead requiring a perfect facial seal is of no use for protection against aerosolized threat. Some simply cannot use an N95 face to mask because they cannot pass N95 fit testing against leaks. seal. [ … ] Bunny Science Halo PAPR isolates user via positive pressure instead hoping forMasks which does not form a perfect seal. facial seal is of no use for protection against aerosolized threat. Some simply cannot use an N95 mask because they can never pass fit testing for leaks. PAPR's avoid this usage pitfall. [ … ] 2. Filter material must be effective against Halo PAPR extends use of approved, viral threat and be safe to breath through. The filter material must also be mounted without any leaks around filters. These are ubiquitous in the material. operating room setting and have safely provided higher than N95 filtering for many years. Design Highlights [ … ] Halo PAPR uses commonly available (in hospitals) anesthesia circuit viral filters. These filters are* Provide clean breathing air via FDA approved approved, ventilator viral filter or medical air/oxygen * COMPLETELY protect entire head and provide better than N95 filtering. face to airborne and splash risks * Uses positive pressure to maintain protection even without a perfect seal * Use disposables that are readily available * Able to create positive pressure seal even using FDM 3D parts. [ … ] 3D parts files can be downloaded from... https://www.thingiverse.com/thing:4243272 or https://www.prusaprinters.org/prints/27657-halo-buildable-papr-powered-air-purifying-respiratHood 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. [ … ] Full Intro and Instructional Video https://youtu.be/JMXP8jAmDKA [ ] Peek at Flex Fit Version https://youtu.be/w_upTc2izU4Fan 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. [ … ] Design HighlightsDevelopmental Testing [ … ] * Provide clean breathingThe Halo 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 via FDA approved, ventilator viral filter * Completely cover head intake, exhausts, and face neck seal. Although, this is not identical to protect against airborne COVID risks * Use positive pressure NaCl challenge, there is no logical reason to maintain protection even without a perfect seal * Use disposables that are readily available * Field buildable require re-testing of filters already accepted by FDA as having adequate viral filtering. [ … ] Barrier is a polyethylene bag placed over head and secured around neck. PAPR Halo provides airtight penetrations through the bagPhysiologic monitoring for inspiration CO2 clearance, oxygen saturation, and expiration. Breathable environment is at positive pressure. Expiration ports are unidirectional flow, but typically valve function is never engaged due respiratory rate was verified as sustainable using OR patient monitor and continuous gas sampling analysis. User ability to continual positive pressure. wear system for over four hours was confirmed. Wearer has ability to carry out typical operating room procedures, watch monitor, fill out EHR, walk and push gurneys. [ … ] Fan - Portable operation is possible with the Halo PAPR by drawing room air through anesthesia viral filter via a fan. Fan is powered by 12 volt battery pack or AC adapter.Main Project Page https://bunnyscience.dozuki.com/Guide/HALO+Respirator+(Buildable+PAPR)/4 [ … ] Note: Oxygen fed configuration is deprecated. Fan configuration is far superior for mobilityDetailed clinical, assembly, and avoids risks of 100% O2. Current STL's omit former O2 tubing clips. function video are now at... https://youtu.be/JMXP8jAmDKA [ … ] Testing [ ] PAPR has been leak tested against micro-aerosolized threat using same aerosols as N95 mask fit testing. To simulate worst case test conditions, test aerosol was directed at air intake, exhausts, and neck seal. EtCO2 and pulse saturation monitoring of user over several hours were also performed.Most Recent 3D parts files can be downloaded from... https://www.thingiverse.com/thing:4243272 or  https://www.prusaprinters.org/prints/27657-halo-buildable-papr-powered-air-purifying-respirat [ … ] The Bunny Science Halo PAPR is not yet a regulatory approved device. Use of this Halo respirator is at your sole discretion and risk.'' [ … ] Project is released under Creative Commons Attribution-NonCommercial-NoDerivs CC BY-NC-ND. [ … ] Bunny Science is the explorations arm of Kuo Software, LLC Art Credit: Generic human head model by John Brown.
Bunny Science HALO Respirator design by Guy Kuo, MD Anesthesiologist. [ … ] a mask nor face shield, mask, but a full protective PAPR (Powered Air Purifying Respirator). It solves issues that plague not only DIY masks but also commercial N95 masks. extends utility of already FDA approved anesthesia viral filters to create a highly protective PAPR. As a full head covering PAPR, it protects both aerosol, droplet, and splash threat from all directions. [ … ] 1. Perfect face fit requirement: A mask which does not form Bunny Science Halo PAPR isolates user via positive pressure instead requiring a perfect facial seal is of no use for protection against aerosolized threat. Some simply cannot use an N95 face to mask because they cannot pass N95 fit testing against leaks. seal. [ … ] Bunny Science Halo PAPR isolates user via positive pressure instead hoping forMasks which does not form a perfect seal. facial seal is of no use for protection against aerosolized threat. Some simply cannot use an N95 mask because they can never pass fit testing for leaks. PAPR's avoid this usage pitfall. [ … ] 2. Filter material must be effective against Halo PAPR extends use of approved, viral threat and be safe to breath through. The filter material must also be mounted without any leaks around filters. These are ubiquitous in the material. operating room setting and have safely provided higher than N95 filtering for many years. Design Highlights [ … ] Halo PAPR uses commonly available (in hospitals) anesthesia circuit viral filters. These filters are* Provide clean breathing air via FDA approved approved, ventilator viral filter or medical air/oxygen * COMPLETELY protect entire head and provide better than N95 filtering. face to airborne and splash risks * Uses positive pressure to maintain protection even without a perfect seal * Use disposables that are readily available * Able to create positive pressure seal even using FDM 3D parts. [ … ] 3D parts files can be downloaded from... https://www.thingiverse.com/thing:4243272 or https://www.prusaprinters.org/prints/27657-halo-buildable-papr-powered-air-purifying-respiratHood 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. [ … ] Full Intro and Instructional Video https://youtu.be/JMXP8jAmDKA [ ] Peek at Flex Fit Version https://youtu.be/w_upTc2izU4Fan 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. [ … ] Design HighlightsDevelopmental Testing [ … ] * Provide clean breathingThe Halo 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 via FDA approved, ventilator viral filter * Completely cover head intake, exhausts, and face neck seal. Although, this is not identical to protect against airborne COVID risks * Use positive pressure NaCl challenge, there is no logical reason to maintain protection even without a perfect seal * Use disposables that are readily available * Field buildable require re-testing of filters already accepted by FDA as having adequate viral filtering. [ … ] Barrier is a polyethylene bag placed over head and secured around neck. PAPR Halo provides airtight penetrations through the bagPhysiologic monitoring for inspiration CO2 clearance, oxygen saturation, and expiration. Breathable environment is at positive pressure. Expiration ports are unidirectional flow, but typically valve function is never engaged due respiratory rate was verified as sustainable using OR patient monitor and continuous gas sampling analysis. User ability to continual positive pressure. wear system for over four hours was confirmed. Wearer has ability to carry out typical operating room procedures, watch monitor, fill out EHR, walk and push gurneys. [ … ] Fan - Portable operation is possible with the Halo PAPR by drawing room air through anesthesia viral filter via a fan. Fan is powered by 12 volt battery pack or AC adapter.Main Project Page https://bunnyscience.dozuki.com/Guide/HALO+Respirator+(Buildable+PAPR)/4 [ … ] Note: Oxygen fed configuration is deprecated. Fan configuration is far superior for mobilityDetailed clinical, assembly, and avoids risks of 100% O2. Current STL's omit former O2 tubing clips. function video are now at... https://youtu.be/JMXP8jAmDKA [ … ] Testing [ ] PAPR has been leak tested against micro-aerosolized threat using same aerosols as N95 mask fit testing. To simulate worst case test conditions, test aerosol was directed at air intake, exhausts, and neck seal. EtCO2 and pulse saturation monitoring of user over several hours were also performed.Most Recent 3D parts files can be downloaded from... https://www.thingiverse.com/thing:4243272 or  https://www.prusaprinters.org/prints/27657-halo-buildable-papr-powered-air-purifying-respirat [ … ] The Bunny Science Halo PAPR is not yet a regulatory approved device. Use of this Halo respirator is at your sole discretion and risk.'' [ … ] Project is released under Creative Commons Attribution-NonCommercial-NoDerivs CC BY-NC-ND. [ … ] Bunny Science is the explorations arm of Kuo Software, LLC Art Credit: Generic human head model by John Brown.