Comparison of air change efficiency, contaminant removal effectiveness and infection risk as IAQ indices in isolation rooms

Villafruela, J.M.; Ruíz, Francisco; Alonso, Julio Francisco San José; Saint-Martin, Julien

doi:10.1016/j.enbuild.2012.10.053

Cited by 75 publications

(52 citation statements)

References 26 publications

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“…The results obtained by the investigation presented in this paper support the statement that the position of the air inlets and outlets has a great influence on the quality of the ventilation (when the rest of the parameters are equal) [30].…”

Section: Discussionsupporting

confidence: 88%

The impact of the air distribution method in ventilated rooms on the aerosol particle dispersion and removal: The experimental approach

Jurelionis¹,

Gagyte²,

Prasauskas³

et al. 2015

Energy and Buildings

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Section: Discussionsupporting

confidence: 88%

The impact of the air distribution method in ventilated rooms on the aerosol particle dispersion and removal: The experimental approach

Jurelionis¹,

Gagyte²,

Prasauskas³

et al. 2015

Energy and Buildings

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“…The ventilation strategy usually provides as much clean air as possible for the breathing zone by both diluting the pollutants and infected air from the indoor environment and removing the pollutants and infected air from it (Etheridge and Sandberg 1996;Awbi 2003). Although a lot of studies have been conducted to minimize the airborne infection routes in healthcare settings by using engineering solutions (Cheong and Phua, 2006;Qian et al 2008;Kwan et al 2008;Ho et al 2009;Nielsen et al 2010;Yam et al 2011;Villafruela et al 2013), only specialized areas, such as wards, operating rooms, and isolation rooms, were considered.…”

Section: Introductionmentioning

confidence: 98%

A time-based analysis of the personalized exhaust system for airborne infection control in healthcare settings

Yang

Sekhar

Cheong

et al. 2015

Science and Technology for the Built Environment

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In healthcare centers, healthcare workers would not know if patients are infected or not until the infected person is diagnosed and moved to an isolation room; therefore, the effectiveness of ventilation systems in removing the exhaled infectious air in the consultation room becomes important. To prevent the transmission of exhaled air, two types of personalized exhaust devices were explored: toppersonalized exhaust and shoulder-personalized exhaust. Three different arrangements with 30 cases between 2 manikins were studied experimentally using tracer gas. The intake fraction was compared with and without the personalized exhaust at the end of three different exposure durations: 10, 20, and 30 min. The results show that after applying either top-personalized exhaust or shoulderpersonalized exhaust, the intake fraction is significantly decreased. With the higher flow rate of 20 L/s of personalized exhaust, the intake fractions at 30 min are found to be even lower than the intake fractions at 10 min without personalized exhaust. This implies that despite a longer exposure time, if the exposure amount is reduced, the infection risk is observed to be lower.

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“…To prevent or minimize the spread of contaminated air exhaled by occupants efficiently, the ideal strategy is to exhaust the exhaled air as much as possible right around the IP. In the field of ventilation design in healthcare centers and hospitals, many studies have been conducted to minimize both the short-range and long-range airborne infection routes (Baloccoa and Lio, 2011;Cheong and Phua, 2006;Ho et al, 2009;Nielsen et al, 2010;Qian et al, 2008;Villafruela et al, 2013). However, most healthcare ventilation system studies focus on specialized areas such as ward, operating rooms, and isolation rooms.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of a novel personalized ventilation-personalized exhaust system for airborne infection control

et al. 2014

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In the context of airborne infection control, it is critical that the ventilation system is able to extract the contaminated exhaled air within the shortest possible time. To minimize the spread of contaminated air exhaled by occupants efficiently, a novel personalized ventilation (PV)-personalized exhaust (PE) system has been developed, which aims to exhaust the exhaled air as much as possible from around the infected person (IP). The PV-PE system was studied experimentally for a particular healthcare setting based on a typical consultation room geometry and four different medical consultation positions of an IP and a healthy person (HP). Experiments using two types of tracer gases were conducted to evaluate two types of PE: Top-PE and Shoulder-PE under two different background ventilation systems: Mixing Ventilation and Displacement Ventilation. Personalized exposure effectiveness, intake fraction (iF) and exposure reduction (ε) were used as indices to evaluate the PV-PE system. The results show that the combined PV-PE system for the HP achieves the lowest intake fraction; and the use of PE system for the IP alone shows much better performance than using PV system for the HP alone.

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Comparison of air change efficiency, contaminant removal effectiveness and infection risk as IAQ indices in isolation rooms

Cited by 75 publications

References 26 publications

The impact of the air distribution method in ventilated rooms on the aerosol particle dispersion and removal: The experimental approach

The impact of the air distribution method in ventilated rooms on the aerosol particle dispersion and removal: The experimental approach

A time-based analysis of the personalized exhaust system for airborne infection control in healthcare settings

Performance evaluation of a novel personalized ventilation-personalized exhaust system for airborne infection control

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