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Article: An evaluation of the ventilation performance of new SARS isolation wards in nine hospitals in Hong Kong

TitleAn evaluation of the ventilation performance of new SARS isolation wards in nine hospitals in Hong Kong
Authors
KeywordsAir change rate
Airflow
Isolation room
Negative pressure
SARS
Issue Date2007
PublisherSage Publications Ltd.. The Journal's web site is located at http://ibe.sagepub.com
Citation
Indoor And Built Environment, 2007, v. 16 n. 5, p. 400-410 How to Cite?
AbstractIn response to the 2003 outbreak of severe acute respiratory syndrome (SARS) the Hong Kong Government promptly constructed 558 new state-of-the-art SARS isolation rooms with more than 1300 beds in 14 hospitals. These were completed by the end of 2003 and some will be available for H5N1 influenza patients, if any human cases occur. We investigated the ventilation of the wards after 18 months of operation and identified the major factors that affect ventilation effectiveness. Negative pressure, airflow path, air change rate and local ventilation effectiveness in selected rooms in 9 major hospitals were measured and their performance assessed against CDC requirements. Testing in 38 rooms found that 97% met the recommended negative pressure difference of 2.5 Pa between corridor and anteroom, 89% of 48 met the same requirement between anteroom and cubicle. No leakage of air to the corridor was found, but 60% of the toilets/bathrooms were operated under positive pressure. Over 90% of corridor-anteroom or anteroom-cubicle doors had bi-directional flow when the door was open. Of 35 tested cubicles, 26% had an air change rate <12 ACH and their ventilation was non-uniform. Despite using state-of-the-art technologies, 28% of the rooms tested still failed to meet the 12 ACH ventilation requirement and 60% had the wrong airflow direction for the toilets/bathrooms, but all satisfied the requirement of no air leakage to the corridor. Regular checks of airflow direction and air change rate are highly recommended together with specific education or training of hospital maintenance engineers and health care workers. © SAGE Publications 2007.
Persistent Identifierhttp://hdl.handle.net/10722/76070
ISSN
2015 Impact Factor: 0.943
2015 SCImago Journal Rankings: 0.522
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLi, Yen_HK
dc.contributor.authorChing, WHen_HK
dc.contributor.authorQian, Hen_HK
dc.contributor.authorYuen, PLen_HK
dc.contributor.authorSeto, WHen_HK
dc.contributor.authorKwan, JKen_HK
dc.contributor.authorLeung, JKCen_HK
dc.contributor.authorLeung, Men_HK
dc.contributor.authorYu, SCTen_HK
dc.date.accessioned2010-09-06T07:17:21Z-
dc.date.available2010-09-06T07:17:21Z-
dc.date.issued2007en_HK
dc.identifier.citationIndoor And Built Environment, 2007, v. 16 n. 5, p. 400-410en_HK
dc.identifier.issn1420-326Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/76070-
dc.description.abstractIn response to the 2003 outbreak of severe acute respiratory syndrome (SARS) the Hong Kong Government promptly constructed 558 new state-of-the-art SARS isolation rooms with more than 1300 beds in 14 hospitals. These were completed by the end of 2003 and some will be available for H5N1 influenza patients, if any human cases occur. We investigated the ventilation of the wards after 18 months of operation and identified the major factors that affect ventilation effectiveness. Negative pressure, airflow path, air change rate and local ventilation effectiveness in selected rooms in 9 major hospitals were measured and their performance assessed against CDC requirements. Testing in 38 rooms found that 97% met the recommended negative pressure difference of 2.5 Pa between corridor and anteroom, 89% of 48 met the same requirement between anteroom and cubicle. No leakage of air to the corridor was found, but 60% of the toilets/bathrooms were operated under positive pressure. Over 90% of corridor-anteroom or anteroom-cubicle doors had bi-directional flow when the door was open. Of 35 tested cubicles, 26% had an air change rate <12 ACH and their ventilation was non-uniform. Despite using state-of-the-art technologies, 28% of the rooms tested still failed to meet the 12 ACH ventilation requirement and 60% had the wrong airflow direction for the toilets/bathrooms, but all satisfied the requirement of no air leakage to the corridor. Regular checks of airflow direction and air change rate are highly recommended together with specific education or training of hospital maintenance engineers and health care workers. © SAGE Publications 2007.en_HK
dc.languageengen_HK
dc.publisherSage Publications Ltd.. The Journal's web site is located at http://ibe.sagepub.comen_HK
dc.relation.ispartofIndoor and Built Environmenten_HK
dc.subjectAir change rateen_HK
dc.subjectAirflowen_HK
dc.subjectIsolation roomen_HK
dc.subjectNegative pressureen_HK
dc.subjectSARSen_HK
dc.titleAn evaluation of the ventilation performance of new SARS isolation wards in nine hospitals in Hong Kongen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1420-326X&volume=16&spage=400&epage=410&date=2007&atitle=An+evaluation+of+the+ventilation+performance+of+new+SARS+isolation+wards+in+nine+hospitals+in+Hong+Kongen_HK
dc.identifier.emailLi, Y: liyg@hkucc.hku.hken_HK
dc.identifier.emailLeung, JKC: jkcleung@hku.hken_HK
dc.identifier.authorityLi, Y=rp00151en_HK
dc.identifier.authorityLeung, JKC=rp00732en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1177/1420326X07082562en_HK
dc.identifier.scopuseid_2-s2.0-35348904373en_HK
dc.identifier.hkuros146665en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-35348904373&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume16en_HK
dc.identifier.issue5en_HK
dc.identifier.spage400en_HK
dc.identifier.epage410en_HK
dc.identifier.isiWOS:000250812300003-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridLi, Y=7502094052en_HK
dc.identifier.scopusauthoridChing, WH=7101701289en_HK
dc.identifier.scopusauthoridQian, H=36091859600en_HK
dc.identifier.scopusauthoridYuen, PL=15836149400en_HK
dc.identifier.scopusauthoridSeto, WH=35293452400en_HK
dc.identifier.scopusauthoridKwan, JK=15843392500en_HK
dc.identifier.scopusauthoridLeung, JKC=24080627200en_HK
dc.identifier.scopusauthoridLeung, M=44161245100en_HK
dc.identifier.scopusauthoridYu, SCT=22837370400en_HK

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