Proposal of a new slit-lamp shield for ophthalmic examination and assessment of its effectiveness using computational simulations
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Arquivos brasileiros de oftalmologia (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0004-27492022005006204 |
Resumo: | ABSTRACT Purpose: This study aimed to use computational models for simulating the movement of respiratory droplets when assessing the efficacy of standard slit-lamp shield versus a new shield designed for increased clinician comfort as well as adequate protection. Methods: Simulations were performed using the commercial software Star-CCM+. Respiratory droplets were assumed to be 100% water in volume fraction with particle diameter distribution represented by a geometric mean of 74.4 (±1.5 standard deviation) μm over a 4-min duration. The total mass of respiratory droplets expelled from patients’ mouths and droplet accumulation on the manikin were measured under the following three conditions: with no slit-lamp shield, using the standard slit-lamp shield, and using our new proposed shield. Results: The total accumulated water droplet mass (kilogram) and percentage of expelled mass accumulated on the shield under the three aforementioned conditions were as follows: 5.84e-10 kg (28% of the total weight of particle emitted that settled on the manikin), 9.14e-13 kg (0.045%), and 3.19e-13 (0.015%), respectively. The standard shield could shield off 99.83% of the particles that would otherwise be deposited on the manikin, which is comparable to 99.95% for the proposed design. Conclusion: Slit-lamp shields are effective infection control tools against respiratory droplets. The proposed shield showed comparable effectiveness compared with conventional slit-lamp shields, but with potentially enhanced ergonomics for ophthalmologists during slit-lamp examinations. |
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Arquivos brasileiros de oftalmologia (Online) |
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Proposal of a new slit-lamp shield for ophthalmic examination and assessment of its effectiveness using computational simulationsOphthalmologi stsCoronavirus infections/prevention & control;PandemicsLipid dropletsSARS-CoV-2Slit-lampComputer simulationProtectivedevicesEquipment designABSTRACT Purpose: This study aimed to use computational models for simulating the movement of respiratory droplets when assessing the efficacy of standard slit-lamp shield versus a new shield designed for increased clinician comfort as well as adequate protection. Methods: Simulations were performed using the commercial software Star-CCM+. Respiratory droplets were assumed to be 100% water in volume fraction with particle diameter distribution represented by a geometric mean of 74.4 (±1.5 standard deviation) μm over a 4-min duration. The total mass of respiratory droplets expelled from patients’ mouths and droplet accumulation on the manikin were measured under the following three conditions: with no slit-lamp shield, using the standard slit-lamp shield, and using our new proposed shield. Results: The total accumulated water droplet mass (kilogram) and percentage of expelled mass accumulated on the shield under the three aforementioned conditions were as follows: 5.84e-10 kg (28% of the total weight of particle emitted that settled on the manikin), 9.14e-13 kg (0.045%), and 3.19e-13 (0.015%), respectively. The standard shield could shield off 99.83% of the particles that would otherwise be deposited on the manikin, which is comparable to 99.95% for the proposed design. Conclusion: Slit-lamp shields are effective infection control tools against respiratory droplets. The proposed shield showed comparable effectiveness compared with conventional slit-lamp shields, but with potentially enhanced ergonomics for ophthalmologists during slit-lamp examinations.Conselho Brasileiro de Oftalmologia2022-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0004-27492022005006204Arquivos Brasileiros de Oftalmologia n.ahead 2022reponame:Arquivos brasileiros de oftalmologia (Online)instname:Conselho Brasileiro de Oftalmologia (CBO)instacron:CBO10.5935/0004-2749.20230058info:eu-repo/semantics/openAccessFerraz,Daniel AraújoGuan,ZeyuCosta,Edinilson A.Martins,EduardoKeane,Pearse A.Ting,Daniel Shu WeiBelfort Jr,RubensScherer,RafaelKoh,VictorMuccioli,Cristinaeng2022-05-06T00:00:00Zoai:scielo:S0004-27492022005006204Revistahttp://aboonline.org.br/https://old.scielo.br/oai/scielo-oai.phpaboonline@cbo.com.br||abo@cbo.com.br1678-29250004-2749opendoar:2022-05-06T00:00Arquivos brasileiros de oftalmologia (Online) - Conselho Brasileiro de Oftalmologia (CBO)false |
dc.title.none.fl_str_mv |
Proposal of a new slit-lamp shield for ophthalmic examination and assessment of its effectiveness using computational simulations |
title |
Proposal of a new slit-lamp shield for ophthalmic examination and assessment of its effectiveness using computational simulations |
spellingShingle |
Proposal of a new slit-lamp shield for ophthalmic examination and assessment of its effectiveness using computational simulations Ferraz,Daniel Araújo Ophthalmologi sts Coronavirus infections/prevention & control;Pandemics Lipid droplets SARS-CoV-2 Slit-lamp Computer simulation Protectivedevices Equipment design |
title_short |
Proposal of a new slit-lamp shield for ophthalmic examination and assessment of its effectiveness using computational simulations |
title_full |
Proposal of a new slit-lamp shield for ophthalmic examination and assessment of its effectiveness using computational simulations |
title_fullStr |
Proposal of a new slit-lamp shield for ophthalmic examination and assessment of its effectiveness using computational simulations |
title_full_unstemmed |
Proposal of a new slit-lamp shield for ophthalmic examination and assessment of its effectiveness using computational simulations |
title_sort |
Proposal of a new slit-lamp shield for ophthalmic examination and assessment of its effectiveness using computational simulations |
author |
Ferraz,Daniel Araújo |
author_facet |
Ferraz,Daniel Araújo Guan,Zeyu Costa,Edinilson A. Martins,Eduardo Keane,Pearse A. Ting,Daniel Shu Wei Belfort Jr,Rubens Scherer,Rafael Koh,Victor Muccioli,Cristina |
author_role |
author |
author2 |
Guan,Zeyu Costa,Edinilson A. Martins,Eduardo Keane,Pearse A. Ting,Daniel Shu Wei Belfort Jr,Rubens Scherer,Rafael Koh,Victor Muccioli,Cristina |
author2_role |
author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Ferraz,Daniel Araújo Guan,Zeyu Costa,Edinilson A. Martins,Eduardo Keane,Pearse A. Ting,Daniel Shu Wei Belfort Jr,Rubens Scherer,Rafael Koh,Victor Muccioli,Cristina |
dc.subject.por.fl_str_mv |
Ophthalmologi sts Coronavirus infections/prevention & control;Pandemics Lipid droplets SARS-CoV-2 Slit-lamp Computer simulation Protectivedevices Equipment design |
topic |
Ophthalmologi sts Coronavirus infections/prevention & control;Pandemics Lipid droplets SARS-CoV-2 Slit-lamp Computer simulation Protectivedevices Equipment design |
description |
ABSTRACT Purpose: This study aimed to use computational models for simulating the movement of respiratory droplets when assessing the efficacy of standard slit-lamp shield versus a new shield designed for increased clinician comfort as well as adequate protection. Methods: Simulations were performed using the commercial software Star-CCM+. Respiratory droplets were assumed to be 100% water in volume fraction with particle diameter distribution represented by a geometric mean of 74.4 (±1.5 standard deviation) μm over a 4-min duration. The total mass of respiratory droplets expelled from patients’ mouths and droplet accumulation on the manikin were measured under the following three conditions: with no slit-lamp shield, using the standard slit-lamp shield, and using our new proposed shield. Results: The total accumulated water droplet mass (kilogram) and percentage of expelled mass accumulated on the shield under the three aforementioned conditions were as follows: 5.84e-10 kg (28% of the total weight of particle emitted that settled on the manikin), 9.14e-13 kg (0.045%), and 3.19e-13 (0.015%), respectively. The standard shield could shield off 99.83% of the particles that would otherwise be deposited on the manikin, which is comparable to 99.95% for the proposed design. Conclusion: Slit-lamp shields are effective infection control tools against respiratory droplets. The proposed shield showed comparable effectiveness compared with conventional slit-lamp shields, but with potentially enhanced ergonomics for ophthalmologists during slit-lamp examinations. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0004-27492022005006204 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0004-27492022005006204 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.5935/0004-2749.20230058 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Conselho Brasileiro de Oftalmologia |
publisher.none.fl_str_mv |
Conselho Brasileiro de Oftalmologia |
dc.source.none.fl_str_mv |
Arquivos Brasileiros de Oftalmologia n.ahead 2022 reponame:Arquivos brasileiros de oftalmologia (Online) instname:Conselho Brasileiro de Oftalmologia (CBO) instacron:CBO |
instname_str |
Conselho Brasileiro de Oftalmologia (CBO) |
instacron_str |
CBO |
institution |
CBO |
reponame_str |
Arquivos brasileiros de oftalmologia (Online) |
collection |
Arquivos brasileiros de oftalmologia (Online) |
repository.name.fl_str_mv |
Arquivos brasileiros de oftalmologia (Online) - Conselho Brasileiro de Oftalmologia (CBO) |
repository.mail.fl_str_mv |
aboonline@cbo.com.br||abo@cbo.com.br |
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1754209032321630208 |