The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
Connor J Green - One of the best experts on this subject based on the ideXlab platform.
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custom solution for personal protective equipment ppe in the orthopaedic setting retrofitting stryker flyte t5 ppe system
Journal of Hospital Infection, 2021Co-Authors: John P. Gibbons, Joshua W. Hayes, Conor J Skerritt, John M Obyrne, Connor J GreenAbstract:The COVID-19 pandemic has meant that there is growing pressure on hospital resources not least the availability of appropriate personal protective equipment (PPE), specifically, facemasks and respirator masks. Within the field of orthopaedic surgery, it is a common sight to see orthopaedic surgery carried out in "space suits" (SS) which comprise of a helmet, hood and surgical gown. In this study the authors made modifications to two different SS systems to incorporate high-efficiency particulate air (HEPA) Filters to the inlets to the fan to assess their potential as a method of providing a reusable system for PPE for the surgeon with regard to protection from a respiratory droplet spread virus. The testing was carried out using particle counter upstream and downstream on a manikin wearing two different SS systems with and without modifications to the inlet. The results show that using a layer of HEPA Filter cut to size, and sealed to the inlet for the fan in the helmet will reduce the downstream particulate at the user's mouth by over 99.5% which is equivalent to that of a respirator mask. HEPA Filter material is relatively cheap and can be used repeatedly making this a viable alternative to disposable, and even re-sterilized, respirator masks in the setting of a respiratory droplet spread viral pandemic.
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Custom solution for PPE in the orthopaedic setting: retrofitting Stryker Flyte T5® PPE system.
The Journal of hospital infection, 2020Co-Authors: John P. Gibbons, Joshua W. Hayes, Conor J Skerritt, John M. O’byrne, Connor J GreenAbstract:The COVID-19 pandemic has meant that there is growing pressure on hospital resources not least the availability of appropriate personal protective equipment (PPE), specifically, facemasks and respirator masks. Within the field of orthopaedic surgery, it is a common sight to see orthopaedic surgery carried out in "space suits" (SS) which comprise of a helmet, hood and surgical gown. In this study the authors made modifications to two different SS systems to incorporate high-efficiency particulate air (HEPA) Filters to the inlets to the fan to assess their potential as a method of providing a reusable system for PPE for the surgeon with regard to protection from a respiratory droplet spread virus. The testing was carried out using particle counter upstream and downstream on a manikin wearing two different SS systems with and without modifications to the inlet. The results show that using a layer of HEPA Filter cut to size, and sealed to the inlet for the fan in the helmet will reduce the downstream particulate at the user's mouth by over 99.5% which is equivalent to that of a respirator mask. HEPA Filter material is relatively cheap and can be used repeatedly making this a viable alternative to disposable, and even re-sterilized, respirator masks in the setting of a respiratory droplet spread viral pandemic.
John P. Gibbons - One of the best experts on this subject based on the ideXlab platform.
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custom solution for personal protective equipment ppe in the orthopaedic setting retrofitting stryker flyte t5 ppe system
Journal of Hospital Infection, 2021Co-Authors: John P. Gibbons, Joshua W. Hayes, Conor J Skerritt, John M Obyrne, Connor J GreenAbstract:The COVID-19 pandemic has meant that there is growing pressure on hospital resources not least the availability of appropriate personal protective equipment (PPE), specifically, facemasks and respirator masks. Within the field of orthopaedic surgery, it is a common sight to see orthopaedic surgery carried out in "space suits" (SS) which comprise of a helmet, hood and surgical gown. In this study the authors made modifications to two different SS systems to incorporate high-efficiency particulate air (HEPA) Filters to the inlets to the fan to assess their potential as a method of providing a reusable system for PPE for the surgeon with regard to protection from a respiratory droplet spread virus. The testing was carried out using particle counter upstream and downstream on a manikin wearing two different SS systems with and without modifications to the inlet. The results show that using a layer of HEPA Filter cut to size, and sealed to the inlet for the fan in the helmet will reduce the downstream particulate at the user's mouth by over 99.5% which is equivalent to that of a respirator mask. HEPA Filter material is relatively cheap and can be used repeatedly making this a viable alternative to disposable, and even re-sterilized, respirator masks in the setting of a respiratory droplet spread viral pandemic.
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Custom solution for PPE in the orthopaedic setting: retrofitting Stryker Flyte T5® PPE system.
The Journal of hospital infection, 2020Co-Authors: John P. Gibbons, Joshua W. Hayes, Conor J Skerritt, John M. O’byrne, Connor J GreenAbstract:The COVID-19 pandemic has meant that there is growing pressure on hospital resources not least the availability of appropriate personal protective equipment (PPE), specifically, facemasks and respirator masks. Within the field of orthopaedic surgery, it is a common sight to see orthopaedic surgery carried out in "space suits" (SS) which comprise of a helmet, hood and surgical gown. In this study the authors made modifications to two different SS systems to incorporate high-efficiency particulate air (HEPA) Filters to the inlets to the fan to assess their potential as a method of providing a reusable system for PPE for the surgeon with regard to protection from a respiratory droplet spread virus. The testing was carried out using particle counter upstream and downstream on a manikin wearing two different SS systems with and without modifications to the inlet. The results show that using a layer of HEPA Filter cut to size, and sealed to the inlet for the fan in the helmet will reduce the downstream particulate at the user's mouth by over 99.5% which is equivalent to that of a respirator mask. HEPA Filter material is relatively cheap and can be used repeatedly making this a viable alternative to disposable, and even re-sterilized, respirator masks in the setting of a respiratory droplet spread viral pandemic.
Joshua W. Hayes - One of the best experts on this subject based on the ideXlab platform.
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custom solution for personal protective equipment ppe in the orthopaedic setting retrofitting stryker flyte t5 ppe system
Journal of Hospital Infection, 2021Co-Authors: John P. Gibbons, Joshua W. Hayes, Conor J Skerritt, John M Obyrne, Connor J GreenAbstract:The COVID-19 pandemic has meant that there is growing pressure on hospital resources not least the availability of appropriate personal protective equipment (PPE), specifically, facemasks and respirator masks. Within the field of orthopaedic surgery, it is a common sight to see orthopaedic surgery carried out in "space suits" (SS) which comprise of a helmet, hood and surgical gown. In this study the authors made modifications to two different SS systems to incorporate high-efficiency particulate air (HEPA) Filters to the inlets to the fan to assess their potential as a method of providing a reusable system for PPE for the surgeon with regard to protection from a respiratory droplet spread virus. The testing was carried out using particle counter upstream and downstream on a manikin wearing two different SS systems with and without modifications to the inlet. The results show that using a layer of HEPA Filter cut to size, and sealed to the inlet for the fan in the helmet will reduce the downstream particulate at the user's mouth by over 99.5% which is equivalent to that of a respirator mask. HEPA Filter material is relatively cheap and can be used repeatedly making this a viable alternative to disposable, and even re-sterilized, respirator masks in the setting of a respiratory droplet spread viral pandemic.
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Custom solution for PPE in the orthopaedic setting: retrofitting Stryker Flyte T5® PPE system.
The Journal of hospital infection, 2020Co-Authors: John P. Gibbons, Joshua W. Hayes, Conor J Skerritt, John M. O’byrne, Connor J GreenAbstract:The COVID-19 pandemic has meant that there is growing pressure on hospital resources not least the availability of appropriate personal protective equipment (PPE), specifically, facemasks and respirator masks. Within the field of orthopaedic surgery, it is a common sight to see orthopaedic surgery carried out in "space suits" (SS) which comprise of a helmet, hood and surgical gown. In this study the authors made modifications to two different SS systems to incorporate high-efficiency particulate air (HEPA) Filters to the inlets to the fan to assess their potential as a method of providing a reusable system for PPE for the surgeon with regard to protection from a respiratory droplet spread virus. The testing was carried out using particle counter upstream and downstream on a manikin wearing two different SS systems with and without modifications to the inlet. The results show that using a layer of HEPA Filter cut to size, and sealed to the inlet for the fan in the helmet will reduce the downstream particulate at the user's mouth by over 99.5% which is equivalent to that of a respirator mask. HEPA Filter material is relatively cheap and can be used repeatedly making this a viable alternative to disposable, and even re-sterilized, respirator masks in the setting of a respiratory droplet spread viral pandemic.
Conor J Skerritt - One of the best experts on this subject based on the ideXlab platform.
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custom solution for personal protective equipment ppe in the orthopaedic setting retrofitting stryker flyte t5 ppe system
Journal of Hospital Infection, 2021Co-Authors: John P. Gibbons, Joshua W. Hayes, Conor J Skerritt, John M Obyrne, Connor J GreenAbstract:The COVID-19 pandemic has meant that there is growing pressure on hospital resources not least the availability of appropriate personal protective equipment (PPE), specifically, facemasks and respirator masks. Within the field of orthopaedic surgery, it is a common sight to see orthopaedic surgery carried out in "space suits" (SS) which comprise of a helmet, hood and surgical gown. In this study the authors made modifications to two different SS systems to incorporate high-efficiency particulate air (HEPA) Filters to the inlets to the fan to assess their potential as a method of providing a reusable system for PPE for the surgeon with regard to protection from a respiratory droplet spread virus. The testing was carried out using particle counter upstream and downstream on a manikin wearing two different SS systems with and without modifications to the inlet. The results show that using a layer of HEPA Filter cut to size, and sealed to the inlet for the fan in the helmet will reduce the downstream particulate at the user's mouth by over 99.5% which is equivalent to that of a respirator mask. HEPA Filter material is relatively cheap and can be used repeatedly making this a viable alternative to disposable, and even re-sterilized, respirator masks in the setting of a respiratory droplet spread viral pandemic.
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Custom solution for PPE in the orthopaedic setting: retrofitting Stryker Flyte T5® PPE system.
The Journal of hospital infection, 2020Co-Authors: John P. Gibbons, Joshua W. Hayes, Conor J Skerritt, John M. O’byrne, Connor J GreenAbstract:The COVID-19 pandemic has meant that there is growing pressure on hospital resources not least the availability of appropriate personal protective equipment (PPE), specifically, facemasks and respirator masks. Within the field of orthopaedic surgery, it is a common sight to see orthopaedic surgery carried out in "space suits" (SS) which comprise of a helmet, hood and surgical gown. In this study the authors made modifications to two different SS systems to incorporate high-efficiency particulate air (HEPA) Filters to the inlets to the fan to assess their potential as a method of providing a reusable system for PPE for the surgeon with regard to protection from a respiratory droplet spread virus. The testing was carried out using particle counter upstream and downstream on a manikin wearing two different SS systems with and without modifications to the inlet. The results show that using a layer of HEPA Filter cut to size, and sealed to the inlet for the fan in the helmet will reduce the downstream particulate at the user's mouth by over 99.5% which is equivalent to that of a respirator mask. HEPA Filter material is relatively cheap and can be used repeatedly making this a viable alternative to disposable, and even re-sterilized, respirator masks in the setting of a respiratory droplet spread viral pandemic.
W. Bergman - One of the best experts on this subject based on the ideXlab platform.
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In-place HEPA Filter penetration test
1997Co-Authors: W. Bergman, Kk. Wilson, B. Bettencourt, J. Elliott, J.w. SlawskiAbstract:We have demonstrated the feasibility of conducting penetration tests on high efficiency particulate air (HEPA) Filters as installed in nuclear ventilation systems. The in-place penetration test, which is designed to yield equivalent penetration measurements as the standard DOP efficiency test, is based on measuring the aerosol penetration of the Filter installation as a function of particle size using a portable laser particle counter. This in-place penetration test is compared to the current in-place leak test using light scattering photometers for single HEPA Filter installations and for HEPA Filter plenums using the shroud method. Test results show the in-place penetration test is more sensitive than the in-place leak test, has a similar operating procedure, but takes longer to conduct. Additional tests are required to confirm that the in-place penetration test yields identical results as the standard dioctyl phthalate (DOP) penetration test for HEPA Filters with controlled leaks in the Filter and gasket and duct by-pass leaks. Further development of the procedure is also required to reduce the test time before the in- place penetration test is practical.
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Potential for HEPA Filter damage from water spray systems in Filter plenums
1997Co-Authors: W. Bergman, J.k. Fretthold, J.w. SlawsldAbstract:The water spray systems in high efficiency particulate air (HEPA) Filter plenums that are used in nearly all Department of Energy (DOE) facilities for protection against fire was designed under the assumption that the HEPA Filters would not be damaged by the water sprays. The most likely scenario for Filter damage involves Filter plugging by the water spray, followed by the fan blowing out the Filter medium. A number of controlled laboratory tests that were previously conducted in the late 1980s are reviewed in this paper to provide a technical basis for the potential HEPA Filter damage by the water spray system in HEPA Filter plenums. In addition to the laboratory tests, the scenario for HEPA Filter damage during fires has also occurred in the field. Afire in a four-stage, HEPA Filter plenum at Rocky Flats in 1980 caused the first three stages of HEPA Filters to blow out of their housing and the fourth stage to severely bow. Details of this recently declassified fire are presented in this paper. Although these previous findings suggest serious potential problems exist with the current water spray system in Filter plenum , additional studies are required to confirm unequivocally that DOE`s critical facilities are at risk.
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Further development of the cleanable steel HEPA Filter, cost/benefit analysis, and comparison with competing technologies
1997Co-Authors: W. Bergman, G. Larsen, R. Lopez, K. Wilson, C. Witherell, M. McgregorAbstract:We have made further progress in developing a cleanable steel fiber HEPA Filter. We fabricated a pleated cylindrical cartridge using commercially available steel fiber media that is made with 1 {mu}m stainless steel fibers and sintered into a sheet form. Test results at the Department of Energy (DOE) Filter Test Station at Oak Ridge show the prototype Filter cartridge has 99.99% efficiency for 0.3 {mu}m dioctyl phthalate (DOP) aerosols and a pressure drop of 1.5 inches. Filter loading and cleaning tests using AC Fine dust showed the Filter could be repeatedly cleaned using reverse air pulses. Our analysis of commercially optimized Filters suggest that cleanable steel HEPA Filters need to be made from steel fibers less than 1 {mu}m, and preferably 0.5 {mu}m, to meet the standard HEPA Filter requirements in production units. We have demonstrated that 0.5 {mu}m steel fibers can be produced using the fiber bundling and drawing process. The 0.5 {mu}m steel fibers are then sintered into small Filter samples and tested for efficiency and pressure drop. Test results on the sample showed a penetration of 0.0015% at 0.3 {mu}m and a pressure drop of 1.15 inches at 6.9 ft/min (3.5 cm/s) velocity. Based on these results, steel fiber media can easily meet the requirements of 0.03% penetration and 1.0 inch of pressure drop by using less fibers in the media. A cost analysis of the cleanable steel HEPA Filter shows that, although the steel HEPA Filter costs much more than the standard glass fiber HEPA Filter, it has the potential to be very cost effective because of the high disposal costs of contaminated HEPA Filters. We estimate that the steel HEPA Filter will save an average of $16,000 over its 30 year life. The additional savings from the clean-up costs resulting from ruptured glass HEPA Filters during accidents was not included but makes the steel HEPA Filter even more cost effective. We also present the results of our evaluation of competing technologies with metallic and ceramic powder Filters, ceramic fiber falters, and reinforced glass fiber Filters. In general, the metallic and ceramic powder Filters have pressure drops in excess of 25 inches of water for HEPA grade efficiencies and are therefore not viable candidates. The ceramic fiber Filters cannot meet the HEPA efficiency because the fiber diameters are too large. The reinforced glass fiber Filter is a promising candidate for the cleanable HEPA Filter but requires additional development and testing to confirm its potential to be repeatedly cleaned. This report is based upon material extracted from a DOE technical review of the Mixed Waste Integrated Program and from the final report of a systems analysis of cleanable steel HEPA Filters.
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further development of the cleanable steel HEPA Filter cost benefit analysis and comparison with competing technologies
24. nuclear air cleaning and treatment conference Portland OR (United States) 15-18 Jul 1996, 1997Co-Authors: W. Bergman, G. Larsen, R. Lopez, K. Wilson, C. Witherell, M. McgregorAbstract:We have made further progress in developing a cleanable steel fiber HEPA Filter. We fabricated a pleated cylindrical cartridge using commercially available steel fiber media that is made with 1 {mu}m stainless steel fibers and sintered into a sheet form. Test results at the Department of Energy (DOE) Filter Test Station at Oak Ridge show the prototype Filter cartridge has 99.99% efficiency for 0.3 {mu}m dioctyl phthalate (DOP) aerosols and a pressure drop of 1.5 inches. Filter loading and cleaning tests using AC Fine dust showed the Filter could be repeatedly cleaned using reverse air pulses. Our analysis of commercially optimized Filters suggest that cleanable steel HEPA Filters need to be made from steel fibers less than 1 {mu}m, and preferably 0.5 {mu}m, to meet the standard HEPA Filter requirements in production units. We have demonstrated that 0.5 {mu}m steel fibers can be produced using the fiber bundling and drawing process. The 0.5 {mu}m steel fibers are then sintered into small Filter samples and tested for efficiency and pressure drop. Test results on the sample showed a penetration of 0.0015% at 0.3 {mu}m and a pressure drop of 1.15 inches at 6.9 ft/min (3.5 cm/s) velocity. Based on these results, steel fiber media can easily meet the requirements of 0.03% penetration and 1.0 inch of pressure drop by using less fibers in the media. A cost analysis of the cleanable steel HEPA Filter shows that, although the steel HEPA Filter costs much more than the standard glass fiber HEPA Filter, it has the potential to be very cost effective because of the high disposal costs of contaminated HEPA Filters. We estimate that the steel HEPA Filter will save an average of $16,000 over its 30 year life. The additional savings from the clean-up costs resulting from ruptured glass HEPA Filters during accidents was not included but makes the steel HEPA Filter even more cost effective. We also present the results of our evaluation of competing technologies with metallic and ceramic powder Filters, ceramic fiber falters, and reinforced glass fiber Filters. In general, the metallic and ceramic powder Filters have pressure drops in excess of 25 inches of water for HEPA grade efficiencies and are therefore not viable candidates. The ceramic fiber Filters cannot meet the HEPA efficiency because the fiber diameters are too large. The reinforced glass fiber Filter is a promising candidate for the cleanable HEPA Filter but requires additional development and testing to confirm its potential to be repeatedly cleaned. This report is based upon material extracted from a DOE technical review of the Mixed Waste Integrated Program and from the final report of a systems analysis of cleanable steel HEPA Filters.
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Requirements for a cleanable steel HEPA Filter derived from a systems analysis
1996Co-Authors: W. BergmanAbstract:A systems analysis was conducted to determine customer requirements for a cleanable high efficiency particulate air (HEPA) Filter in DOE Environmental Management (EM) facilities. The three principal drivers for cleanable steel HEPA are large cost savings, improved Filter reliability, and new regulations; they produce a strong incentive to DOE customers to use cleanable steel HEPA Filters. Input for customer requirements were obtained from field trips to EM sites and from discussions. Most existing applications require that cleanable steel HEPA Filters meet size/performance requirements of standard glass HEPA Filters; applications in new facilities can relax size/weight/pressure drop requirements on a case-by-case basis. We then obtained input from commercial firms on availability of cleanable steel HEPA Filters. Systems analysis then showed that currently available technology was only able to meet customer needs in a limited number of cases. Further development is needed to meet requirements of EM customers. For cleanable steel HEPA to be retrofitted into existing systems, pressure drop and weight must be reduced. Pressure drop can be reduced by developing steel fiber media from 0.5 {mu}m dia steel fibers. Weight can be reduced by packaging the steel fiber media in one of the standard HEPA configurations. Although most applications will be able to use standard 304 or 316L alloys, an acid resistant alloy such as Hastelloy or Inconel will be needed for incinerator and other thermal processes.