Size distribution of exhaled particles in the range from 0.01 to 2.0μm

Holmgren, Helene; Ljungström, Evert; Almstrand, Ann-Charlotte; Bake, Björn; Olin, Anna‐Carin

doi:10.1016/j.jaerosci.2010.02.011

Cited by 134 publications

(141 citation statements)

References 24 publications

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“…Their results showed that the peak size distribution was between 0.8 and 0.9 µm. Having broadened the size range from 0.01 to 2.0 µm to be examined, Holmgren et al (2010) found the size distribution peaks at around 0.07 µm during tidal breathing, and an additional broad and strong peak was found between 0.2 and 0.5 µm. Hence, the infection risk from the normal respiratory activity should be considered, especially in indoor environment with the presence of infected persons.…”

Section: Introductionmentioning

confidence: 99%

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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Section: Introductionmentioning

confidence: 99%

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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show abstract

“…3. EBA is a subset of EBC and is extracted from total EBC, or collected directly using filter materials or particle impingers to capture bacteria, protein fragments, cell fragments, and other particulates directly and exclude gases and vapors (Holmgren et al 2010;Horvath et al 2005). EBC is a versatile medium; depending upon the goal of the study, polar volatile compounds can be analyzed by GC-MS, by liquid chromatography-mass spectrometry (LC-MS), or by various large molecules methods such as immunochemistry.…”

Section: Vapor Aerosol and Particulate Phase Breath Sampling And Anmentioning

confidence: 99%

Breath biomarkers in toxicology

Pleil

2016

Arch Toxicol

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“…A multitude of data from coughs collected from healthy and infected adult patients, 12,21,22 through deliberate bioterror attacks, 23 and from laboratory studies on aerosolized biopathogens, 24 reveal that it is likely that the size distribution will be polydispersed in such situations. In addition, comparing penetration of masks using sodium chloride versus biological aerosols suggests that studies with polydispersed sodium chloride can provide a conservative estimate of penetration.…”

Section: Aerosol Selectionmentioning

confidence: 99%