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Article: Dispersion of exhaled droplet nuclei in a two-bed hospital ward with three different ventilation systems

TitleDispersion of exhaled droplet nuclei in a two-bed hospital ward with three different ventilation systems
Authors
Issue Date2006
PublisherBlackwell Munksgaard. The Journal's web site is located at http://www.blackwellpublishing.com/journals/INA
Citation
Indoor Air, 2006, v. 16 n. 2, p. 111-128 How to Cite?
AbstractEffective ventilation in general hospital wards is important for controlling the airborne transmission of infectious respiratory diseases. Experiments have been carried out to increase our understanding of the interaction of the breathing flows of two individuals in a full-scale experimental hospital ward with three ventilation systems, i.e. mixing, downward and displacement ventilation. Two life-size breathing thermal manikins were used to simulate a source patient and a receiving patient. The exhalation jet from a bed-lying manikin was visualized using smoke. N2O was used as tracer gas to simulate the droplet nuclei exhaled by patients; and the spatial distribution of its concentrations was measured. Our experimental results show that for both mixing and downward ventilation, the exhaled jet penetrates a short distance and is diluted quickly by ventilation air. The exhaled droplet nuclei are well mixed in the ward. Bed distance does not affect the personal exposure of the receiving patient. For displacement ventilation, the exhaled jet can penetrate a long distance. A high concentration layer of exhaled droplet nuclei because of thermal stratification locking has also been observed with displacement ventilation. This work is useful for identifying an appropriate ventilation method that can remove droplet nuclei more effectively and minimize the risk of cross-infections in a hospital ward environment. Copyright © Blackwell Munksgaard 2006.
Persistent Identifierhttp://hdl.handle.net/10722/76043
ISSN
2015 Impact Factor: 4.33
2015 SCImago Journal Rankings: 1.666
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorQian, Hen_HK
dc.contributor.authorLi, Yen_HK
dc.contributor.authorNielsen, PVen_HK
dc.contributor.authorHyldgaard, CEen_HK
dc.contributor.authorWong, TWen_HK
dc.contributor.authorChwang, ATYen_HK
dc.date.accessioned2010-09-06T07:17:04Z-
dc.date.available2010-09-06T07:17:04Z-
dc.date.issued2006en_HK
dc.identifier.citationIndoor Air, 2006, v. 16 n. 2, p. 111-128en_HK
dc.identifier.issn0905-6947en_HK
dc.identifier.urihttp://hdl.handle.net/10722/76043-
dc.description.abstractEffective ventilation in general hospital wards is important for controlling the airborne transmission of infectious respiratory diseases. Experiments have been carried out to increase our understanding of the interaction of the breathing flows of two individuals in a full-scale experimental hospital ward with three ventilation systems, i.e. mixing, downward and displacement ventilation. Two life-size breathing thermal manikins were used to simulate a source patient and a receiving patient. The exhalation jet from a bed-lying manikin was visualized using smoke. N2O was used as tracer gas to simulate the droplet nuclei exhaled by patients; and the spatial distribution of its concentrations was measured. Our experimental results show that for both mixing and downward ventilation, the exhaled jet penetrates a short distance and is diluted quickly by ventilation air. The exhaled droplet nuclei are well mixed in the ward. Bed distance does not affect the personal exposure of the receiving patient. For displacement ventilation, the exhaled jet can penetrate a long distance. A high concentration layer of exhaled droplet nuclei because of thermal stratification locking has also been observed with displacement ventilation. This work is useful for identifying an appropriate ventilation method that can remove droplet nuclei more effectively and minimize the risk of cross-infections in a hospital ward environment. Copyright © Blackwell Munksgaard 2006.en_HK
dc.languageengen_HK
dc.publisherBlackwell Munksgaard. The Journal's web site is located at http://www.blackwellpublishing.com/journals/INAen_HK
dc.relation.ispartofIndoor Airen_HK
dc.subject.meshAir Movementsen_HK
dc.subject.meshAir Pollutants, Occupationalen_HK
dc.subject.meshAir Pollution, Indooren_HK
dc.subject.meshCommunicable Diseases - transmissionen_HK
dc.subject.meshDisease Transmission, Infectiousen_HK
dc.subject.meshHospitalsen_HK
dc.subject.meshHumansen_HK
dc.subject.meshInhalation Exposureen_HK
dc.subject.meshMedical Staff, Hospitalen_HK
dc.subject.meshNitrous Oxideen_HK
dc.subject.meshPatientsen_HK
dc.subject.meshRespirationen_HK
dc.subject.meshSmokeen_HK
dc.subject.meshVentilationen_HK
dc.titleDispersion of exhaled droplet nuclei in a two-bed hospital ward with three different ventilation systemsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0905-6947&volume=16&spage=111&epage=128&date=2006&atitle=Dispersion+of+exhaled+droplet+nuclei+in+a+two-bed+hospital+ward+with+three+different+ventilation+systemsen_HK
dc.identifier.emailLi, Y:liyg@hkucc.hku.hken_HK
dc.identifier.authorityLi, Y=rp00151en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1111/j.1600-0668.2005.00407.xen_HK
dc.identifier.pmid16507039-
dc.identifier.scopuseid_2-s2.0-33644697163en_HK
dc.identifier.hkuros117289en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33644697163&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume16en_HK
dc.identifier.issue2en_HK
dc.identifier.spage111en_HK
dc.identifier.epage128en_HK
dc.identifier.eissn1600-0668-
dc.identifier.isiWOS:000235694800004-
dc.publisher.placeDenmarken_HK
dc.identifier.scopusauthoridQian, H=36091859600en_HK
dc.identifier.scopusauthoridLi, Y=7502094052en_HK
dc.identifier.scopusauthoridNielsen, PV=24773772900en_HK
dc.identifier.scopusauthoridHyldgaard, CE=12764269800en_HK
dc.identifier.scopusauthoridWong, TW=7403531744en_HK
dc.identifier.scopusauthoridChwang, ATY=7005883964en_HK
dc.identifier.citeulike527253-

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