{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,23]],"date-time":"2026-06-23T23:40:12Z","timestamp":1782258012402,"version":"3.54.5"},"reference-count":3,"publisher":"Cambridge University Press (CUP)","issue":"1","license":[{"start":{"date-parts":[[2015,1,2]],"date-time":"2015-01-02T00:00:00Z","timestamp":1420156800000},"content-version":"unspecified","delay-in-days":6941,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Infect. Control Hosp. Epidemiol."],"published-print":{"date-parts":[[1996,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec id=\"S0195941700005993_abs1\">\n                    <jats:title>Objective:<\/jats:title>\n                    <jats:p>To assess the ability of a protective isolation room ventilation system to reduce patient exposure to airborne infectious agents, using a small-scale model that permits cost-effective and unobtrusive study of relevant indices of performance.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"S0195941700005993_abs2\">\n                    <jats:title>Design:<\/jats:title>\n                    <jats:p>A one-half scale model of a protective isolation room at the University of Minnesota Hospital was constructed and equipped for tracer gas experiments to assess ventilation efficiency.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"S0195941700005993_abs3\">\n                    <jats:title>Measurements:<\/jats:title>\n                    <jats:p>Tracer gas (SF6) was injected into the model supply air. Tracer gas concentration was recorded over time and analyzed to determine local and room mean age of air. Age of air is a direct measurement of ventilation efficiency and can be used to predict patient exposure to contamination.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"S0195941700005993_abs4\">\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>Although for the room taken as a whole, ventilation efficiency was close to 50% (a value corresponding to perfect mixing), the experimental results for the local mean age of air indicate that some parts of the model were ventilated much better than others.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"S0195941700005993_abs5\">\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>Room air exchange rate is only one parameter useful in assessing ventilation in patient areas. Effective distribution of ventilation air also is critical to the control of airborne contamination. Areas of the room with poor ventilation would be expected to have higher concentrations of airborne infectious agents and other contaminants. Patient exposure can be minimized by placing the patient in well-ventilated areas of the room. Improved ventilation designs may reduce patient exposure further without increasing actual airflow rate.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1086\/647181","type":"journal-article","created":{"date-parts":[[2009,9,16]],"date-time":"2009-09-16T14:01:39Z","timestamp":1253109699000},"page":"5-10","source":"Crossref","is-referenced-by-count":26,"title":["Studies of Ventilation Efficiency in a Protective Isolation Room by the Use of a Scale Model"],"prefix":"10.1017","volume":"17","author":[{"given":"John W.","family":"Marshall","sequence":"first","affiliation":[{"name":"University of Minnesota Hospital and Clinics"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"James H.","family":"Vincent","sequence":"additional","affiliation":[{"name":"University of Minnesota School of Public Health"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas H.","family":"Kuehn","sequence":"additional","affiliation":[{"name":"University of Minnesota Department of Mechanical Engineering"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lisa M.","family":"Brosseau","sequence":"additional","affiliation":[{"name":"University of Minnesota School of Public Health"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2015,1,2]]},"reference":[{"key":"S0195941700005993_bib001","doi-asserted-by":"crossref","first-page":"123","DOI":"10.1016\/0360-1323(81)90028-7","article-title":"What is ventilation efficiency?","volume":"16","author":"Sandberg","year":"1981","journal-title":"Building and Environment"},{"key":"S0195941700005993_bib003","volume-title":"Technical Note AIVC 28: A Guide to Air Change Efficiency","year":"1990"},{"key":"S0195941700005993_bib002","doi-asserted-by":"publisher","DOI":"10.1016\/0360-1323(83)90026-4"}],"container-title":["Infection Control &amp; Hospital Epidemiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0195941700005993","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,11,7]],"date-time":"2025-11-07T10:17:12Z","timestamp":1762510632000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0195941700005993\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1996,1]]},"references-count":3,"aliases":["10.2307\/30142358","10.2307\/30142358"],"journal-issue":{"issue":"1","published-print":{"date-parts":[[1996,1]]}},"alternative-id":["S0195941700005993"],"URL":"https:\/\/doi.org\/10.1086\/647181","relation":{},"ISSN":["0899-823X","1559-6834"],"issn-type":[{"value":"0899-823X","type":"print"},{"value":"1559-6834","type":"electronic"}],"subject":[],"published":{"date-parts":[[1996,1]]}}}