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Experimental and numerical evaluation of a new visor concept with aerodynamic sealing to protect medical professionals from contaminated droplets and aerosols

2022; Wiley; Volume: 32; Issue: 9 Linguagem: Inglês

10.1111/ina.13114

1600-0668

Nuno Rosa, Mário Jordão, J.J. Costa, Adélio Rodrigues Gaspar, Nuno Martinho, A.M.G. Lopes, Miguel R. Oliveira Panão, Manuel Gameiro da Silva,

Infection Control in Healthcare

Indoor AirVolume 32, Issue 9 e13114 ORIGINAL ARTICLE Experimental and numerical evaluation of a new visor concept with aerodynamic sealing to protect medical professionals from contaminated droplets and aerosols Nuno Rosa, Corresponding Author Nuno Rosa [email protected] orcid.org/0000-0002-1314-165X Univ Coimbra, ADAI, Department of Mechanical Engineering, Coimbra, Portugal Correspondence Nuno Rosa, Univ Coimbra, ADAI, LAETA, Department of Mechanical Engineering, Rua Luís Reis Santos, Pólo II, 3030-788 Coimbra, Portugal. Email: [email protected]Search for more papers by this authorMário Jordão, Mário Jordão orcid.org/0000-0002-2517-7385 Univ Coimbra, ADAI, Department of Mechanical Engineering, Coimbra, PortugalSearch for more papers by this authorJosé Costa, José Costa orcid.org/0000-0002-7015-6989 Univ Coimbra, ADAI, Department of Mechanical Engineering, Coimbra, PortugalSearch for more papers by this authorAdélio Gaspar, Adélio Gaspar orcid.org/0000-0001-6947-4579 Univ Coimbra, ADAI, Department of Mechanical Engineering, Coimbra, PortugalSearch for more papers by this authorNuno Martinho, Nuno Martinho orcid.org/0000-0002-4684-8766 Univ Coimbra, ADAI, Department of Mechanical Engineering, Coimbra, Portugal Polytechnic Institute of Leiria, Department of Mechanical Engineering, Leiria, PortugalSearch for more papers by this authorAntónio Gameiro Lopes, António Gameiro Lopes orcid.org/0000-0002-6852-5394 Univ Coimbra, ADAI, Department of Mechanical Engineering, Coimbra, PortugalSearch for more papers by this authorMiguel Panão, Miguel Panão orcid.org/0000-0001-9561-9268 Univ Coimbra, ADAI, Department of Mechanical Engineering, Coimbra, PortugalSearch for more papers by this authorManuel Gameiro da Silva, Manuel Gameiro da Silva orcid.org/0000-0003-0739-9811 Univ Coimbra, ADAI, Department of Mechanical Engineering, Coimbra, PortugalSearch for more papers by this author Nuno Rosa, Corresponding Author Nuno Rosa [email protected] orcid.org/0000-0002-1314-165X Univ Coimbra, ADAI, Department of Mechanical Engineering, Coimbra, Portugal Correspondence Nuno Rosa, Univ Coimbra, ADAI, LAETA, Department of Mechanical Engineering, Rua Luís Reis Santos, Pólo II, 3030-788 Coimbra, Portugal. Email: [email protected]Search for more papers by this authorMário Jordão, Mário Jordão orcid.org/0000-0002-2517-7385 Univ Coimbra, ADAI, Department of Mechanical Engineering, Coimbra, PortugalSearch for more papers by this authorJosé Costa, José Costa orcid.org/0000-0002-7015-6989 Univ Coimbra, ADAI, Department of Mechanical Engineering, Coimbra, PortugalSearch for more papers by this authorAdélio Gaspar, Adélio Gaspar orcid.org/0000-0001-6947-4579 Univ Coimbra, ADAI, Department of Mechanical Engineering, Coimbra, PortugalSearch for more papers by this authorNuno Martinho, Nuno Martinho orcid.org/0000-0002-4684-8766 Univ Coimbra, ADAI, Department of Mechanical Engineering, Coimbra, Portugal Polytechnic Institute of Leiria, Department of Mechanical Engineering, Leiria, PortugalSearch for more papers by this authorAntónio Gameiro Lopes, António Gameiro Lopes orcid.org/0000-0002-6852-5394 Univ Coimbra, ADAI, Department of Mechanical Engineering, Coimbra, PortugalSearch for more papers by this authorMiguel Panão, Miguel Panão orcid.org/0000-0001-9561-9268 Univ Coimbra, ADAI, Department of Mechanical Engineering, Coimbra, PortugalSearch for more papers by this authorManuel Gameiro da Silva, Manuel Gameiro da Silva orcid.org/0000-0003-0739-9811 Univ Coimbra, ADAI, Department of Mechanical Engineering, Coimbra, PortugalSearch for more papers by this author First published: 18 September 2022 https://doi.org/10.1111/ina.13114Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract The fast spreading of the SARS-CoV-2 virus led to a significant increase in the demand for personal protective equipment (PPE). Healthcare professionals, mainly dentists, work near the patients, increasing their risk of infection. This paper investigates the effectiveness of an air-curtain sealing effect in a newly designed visor developed to reduce the risk of contracting a respiratory infection. This PPE was developed by computational fluid dynamics (CFD) modeling. CFD results show that the aerodynamic sealing in this PPE device effectively protects the user's face by 43% from a contaminated environment. The experiments considered two different tests: one using a tracer gas (CO2) to simulate a gaseous contaminant inside and outside the PPE face shield and a second test using smoke to simulate aerosol transport and evaluate the PPE efficiency. The particle concentration within the aerodynamically sealed PPE was evaluated and compared with the protection efficiency of other PPE. Results show similar protection levels for particles in the 1–5 μm range between the prototype and a KN95 respirator. The combined use of this novel PPE with aerodynamic sealing and a physical mask (KN95 or surgical) produced protection efficiency values within the range of 57%–70% for particles greater than 0.5 μm. This study reveals the potential of using an air curtain combined with a face shield to reduce the risks from contaminated environments. CONFLICT OF INTEREST All authors declare that they have no conflicts of interest. Open Research DATA AVAILABILITY STATEMENT The data that support the findings of this study are available from the corresponding author upon reasonable request. REFERENCES 1Piret J, Boivin G. Pandemics throughout history. Front Microbiol. 2021; 11:631736. doi:10.3389/fmicb.2020.631736 2Jones KE, Patel NG, Levy MA, et al. 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