| Physiological impact of the N95 filtering facepiece respirator on healthcare workers. | |
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MedLine Citation:
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PMID: 20420727 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: To assess the physiological impact of the N95 filtering facepiece respirator (FFR) on healthcare workers. METHODS: Ten healthcare workers each conducted multiple 1-hour treadmill walking sessions, at 1.7 miles/h, and at 2.5 miles/h, while wearing FFR with exhalation valve, FFR without exhalation valve, and without FFR (control session). We monitored heart rate, respiratory rate, tidal volume, minute volume, blood oxygen saturation, and transcutaneously measured P(CO2). We also measured user comfort and exertion, FFR moisture retention, and the carbon dioxide and oxygen concentrations in the FFR's dead space. RESULTS: There were no significant differences between FFR and control in the physiological variables, exertion scores, or comfort scores. There was no significant difference in moisture retention between FFR with and without exhalation valve. Two subjects had peak P(CO2) > or = 50 mm Hg. The FFR with exhalation valve offered no benefit in physiological burden over the FFR without valve. The FFR dead-space oxygen and carbon dioxide levels did not meet the Occupational Safety and Health Administration's ambient workplace standards. CONCLUSIONS: In healthy healthcare workers, FFR did not impose any important physiological burden during 1 hour of use, at realistic clinical work rates, but the FFR dead-space carbon dioxide and oxygen levels were significantly above and below, respectively, the ambient workplace standards, and elevated P(CO2) is a possibility. Exhalation valve did not significantly ameliorate the FFR's P(CO2) impact. |
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Authors:
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Raymond J Roberge; Aitor Coca; W Jon Williams; Jeffrey B Powell; Andrew J Palmiero |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Respiratory care Volume: 55 ISSN: 0020-1324 ISO Abbreviation: Respir Care Publication Date: 2010 May |
Date Detail:
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Created Date: 2010-04-27 Completed Date: 2010-07-06 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7510357 Medline TA: Respir Care Country: United States |
Other Details:
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Languages: eng Pagination: 569-77 Citation Subset: IM |
Affiliation:
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Technology Research Branch, National Personal Protective Technology Laboratory, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, 626 Cochrans Mill Road, Pittsburgh, PA 15236, USA. dtn0@cdc.gov |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Equipment Design Equipment Safety Exercise Test Female Follow-Up Studies Health Personnel* Heart Rate / physiology* Humans Male Masks / standards* Middle Aged Occupational Exposure / prevention & control* Oxygen Consumption / physiology Reference Values Respiratory Protective Devices / standards* Tidal Volume / physiology Work of Breathing / physiology* Workplace / standards Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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