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Comparison of six respirator fit-test methods with an actual measurement of exposure in a simulated health care environment: part III- validation.

Authors
Coffey-CC; Campbell-DL; Myers-WR
Source
Am Ind Hyg Assoc J 1999 May/Jun; 60(3):363-366
NIOSHTIC No.
20000832
Abstract
This article, the last in a series of three, describes the validation phase of a study conducted to test the correlation of respirator fit factors to the subject's actual exposure using biological sampling. The study consisted of three phases: protocol development, method comparison testing, and validation. Six quantitative fit-test methods were evaluated in the method comparison testing phase. The two fit methods with the highest correlation with the wearers' measured exposure were a corn oil method (R2 = 0.81) and an ambient aerosol method (R2 = 0.78). Because the ambient aerosol method is more commonly used in the workplace, it was selected for further analysis. In this validation phase, the fit factors measured during the ambient aerosol fit-test were used to calculate the exposures to Freon-113 by using the model determined in the method comparison testing phase of the study. The actual Freon-113 exposures were then measured and compared with the predicted exposures. The results verified that the ambient aerosol method fit factors are highly correlated to the total Freon-113 exposure dose and thus that the model had a predictive ability.
Keywords
Respirators; Respiratory-protective-equipment; Quality-standards; Performance-capability; Exposure-levels; Author Keywords: biological sampling; exposure dose; fit factor; FreonT-113; quantitative fit-test; respirator
Contact
Christopher C. Coffey, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Division of Respiratory Disease Studies, 1095 Willowdale Road, Morgantown, WV 26505-2888
CODEN
AIHAAP
Publication Date
19990501
Document Type
Journal Article
Fiscal Year
1999
NTIS Accession No.
NTIS Price
Issue of Publication
3
ISSN
0002-8894
NIOSH Division
DRDS
Source Name
American Industrial Hygiene Association Journal
State
WV
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