Staff View: Controlling infectious airborne particle dispersion during surgical procedures: Why mobile air supply units matter?

Controlling infectious airborne particle dispersion during surgical procedures: Why mobile air supply units matter?

The ventilation system in an operating room (OR) plays a vital role in reducing the risk of patients contracting an infection while undergoing a surgical procedure. The clean air supplied from the ceiling-mounted diffuser removes the airborne particles from the surgical site. The clean air, however,...

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Main Authors:	Tan, Huiyi, Wong, Keng YinnWong, Othmand, Mohd. Hafiz Dzarfan, Kek, Hong Yee, Tey, Wah Yen, Nyakuma, Bemgba Bevan, Mong, Guo Ren, Kuan, Garry, Ho, Wai Shin, Kang, Hooi Siang, Sheng, Desmond Daniel Chin Vui, Abdul Wahab, Roswanira
Format:	Article
Published:	Elsevier Ltd 2022
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/101271/ http://dx.doi.org/10.1016/j.buildenv.2022.109489
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spelling	my.utm.1012712023-11-13T06:05:12Z http://eprints.utm.my/101271/ Controlling infectious airborne particle dispersion during surgical procedures: Why mobile air supply units matter? Tan, Huiyi Wong, Keng YinnWong Othmand, Mohd. Hafiz Dzarfan Kek, Hong Yee Tey, Wah Yen Nyakuma, Bemgba Bevan Mong, Guo Ren Kuan, Garry Ho, Wai Shin Kang, Hooi Siang Sheng, Desmond Daniel Chin Vui Abdul Wahab, Roswanira TP Chemical technology The ventilation system in an operating room (OR) plays a vital role in reducing the risk of patients contracting an infection while undergoing a surgical procedure. The clean air supplied from the ceiling-mounted diffuser removes the airborne particles from the surgical site. The clean air, however, is often obstructed by the medical staff and other objects. Hence, some sterile instruments might remain outside the protected area. The present study aims to examine the effectiveness of a mobile air supply (MAS) unit in reducing the particle settlement on a patient under different airflow velocities supplied from the MAS unit. A simplified computational fluid dynamics (CFD) model of the OR was developed and validated based on published data. An RNG k-epsilon turbulence model, based on the Reynolds-Averaged Navier-Stokes (RANS) equations, was used to simulate the airflow, while a discrete phase model (DPM) was used to simulate the movement of the infectious airborne particles. The MAS unit was evaluated as an extension of unidirectional airflow ventilation. Results showed that the MAS unit successfully reduced the settlement of airborne particles by 78% from 45 particles/m3 to 10 particles/m3. However, the operation of the MAS unit showed a reverse effect on the particle settlement (~7 particles/m3) on the patient when the MAS unit supplied air at a velocity of 0.6 m/s. The present study showed that air supply at a velocity of 0.5 m/s provided an optimum wiping effect that removed the airborne particles from the surgical zone. Elsevier Ltd 2022 Article PeerReviewed Tan, Huiyi and Wong, Keng YinnWong and Othmand, Mohd. Hafiz Dzarfan and Kek, Hong Yee and Tey, Wah Yen and Nyakuma, Bemgba Bevan and Mong, Guo Ren and Kuan, Garry and Ho, Wai Shin and Kang, Hooi Siang and Sheng, Desmond Daniel Chin Vui and Abdul Wahab, Roswanira (2022) Controlling infectious airborne particle dispersion during surgical procedures: Why mobile air supply units matter? Building and Environment, 223 (na). pp. 1-17. ISSN 0360-1323 http://dx.doi.org/10.1016/j.buildenv.2022.109489 DOI : 10.1016/j.buildenv.2022.109489
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
topic	TP Chemical technology
spellingShingle	TP Chemical technology Tan, Huiyi Wong, Keng YinnWong Othmand, Mohd. Hafiz Dzarfan Kek, Hong Yee Tey, Wah Yen Nyakuma, Bemgba Bevan Mong, Guo Ren Kuan, Garry Ho, Wai Shin Kang, Hooi Siang Sheng, Desmond Daniel Chin Vui Abdul Wahab, Roswanira Controlling infectious airborne particle dispersion during surgical procedures: Why mobile air supply units matter?
description	The ventilation system in an operating room (OR) plays a vital role in reducing the risk of patients contracting an infection while undergoing a surgical procedure. The clean air supplied from the ceiling-mounted diffuser removes the airborne particles from the surgical site. The clean air, however, is often obstructed by the medical staff and other objects. Hence, some sterile instruments might remain outside the protected area. The present study aims to examine the effectiveness of a mobile air supply (MAS) unit in reducing the particle settlement on a patient under different airflow velocities supplied from the MAS unit. A simplified computational fluid dynamics (CFD) model of the OR was developed and validated based on published data. An RNG k-epsilon turbulence model, based on the Reynolds-Averaged Navier-Stokes (RANS) equations, was used to simulate the airflow, while a discrete phase model (DPM) was used to simulate the movement of the infectious airborne particles. The MAS unit was evaluated as an extension of unidirectional airflow ventilation. Results showed that the MAS unit successfully reduced the settlement of airborne particles by 78% from 45 particles/m3 to 10 particles/m3. However, the operation of the MAS unit showed a reverse effect on the particle settlement (~7 particles/m3) on the patient when the MAS unit supplied air at a velocity of 0.6 m/s. The present study showed that air supply at a velocity of 0.5 m/s provided an optimum wiping effect that removed the airborne particles from the surgical zone.
format	Article
author	Tan, Huiyi Wong, Keng YinnWong Othmand, Mohd. Hafiz Dzarfan Kek, Hong Yee Tey, Wah Yen Nyakuma, Bemgba Bevan Mong, Guo Ren Kuan, Garry Ho, Wai Shin Kang, Hooi Siang Sheng, Desmond Daniel Chin Vui Abdul Wahab, Roswanira
author_facet	Tan, Huiyi Wong, Keng YinnWong Othmand, Mohd. Hafiz Dzarfan Kek, Hong Yee Tey, Wah Yen Nyakuma, Bemgba Bevan Mong, Guo Ren Kuan, Garry Ho, Wai Shin Kang, Hooi Siang Sheng, Desmond Daniel Chin Vui Abdul Wahab, Roswanira
author_sort	Tan, Huiyi
title	Controlling infectious airborne particle dispersion during surgical procedures: Why mobile air supply units matter?
title_short	Controlling infectious airborne particle dispersion during surgical procedures: Why mobile air supply units matter?
title_full	Controlling infectious airborne particle dispersion during surgical procedures: Why mobile air supply units matter?
title_fullStr	Controlling infectious airborne particle dispersion during surgical procedures: Why mobile air supply units matter?
title_full_unstemmed	Controlling infectious airborne particle dispersion during surgical procedures: Why mobile air supply units matter?
title_sort	controlling infectious airborne particle dispersion during surgical procedures: why mobile air supply units matter?
publisher	Elsevier Ltd
publishDate	2022
url	http://eprints.utm.my/101271/ http://dx.doi.org/10.1016/j.buildenv.2022.109489
_version_	1783876348724379648
score	13.211869

Controlling infectious airborne particle dispersion during surgical procedures: Why mobile air supply units matter?

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