EVALUATION OF SINGLE-USE MASKS AND RESPIRATORS FOR PROTECTION OF HEALTH-CARE WORKERS AGAINST MYCOBACTERIAL AEROSOLS

被引：78

作者：

CHEN, SK ^{[1
]}

VESLEY, D ^{[1
]}

BROSSEAU, LM ^{[1
]}

VINCENT, JH ^{[1
]}

机构：

[1] UNIV MINNESOTA,SCH PUBL HLTH,DIV ENVIRONM & OCCUPAT HLTH,BOX 807 MAYO,420 DELAWARE ST SE,MINNEAPOLIS,MN 55455

来源：

AMERICAN JOURNAL OF INFECTION CONTROL | 1994年 / 22卷 / 02期

关键词：

D O I：

10.1016/0196-6553(94)90116-3

中图分类号：

R1 [预防医学、卫生学];

学科分类号：

1004 ; 120402 ;

摘要：

Background: The recent increase in multidrug-resistant tuberculosis has spawned a major controversy concerning the degree of respiratory protection needed by health care workers, particularly during sputum-inducing procedures. The objective of this study was to measure the filtration efficiencies of a single-use submicron surgical mask, two disposable dust/mist respirators, a dust/mist/fume respirator, and a high-efficiency particulate air respirator against aerosolized mycobacteria. Facial fit was not addressed. Methods: In a specially designed enclosed test apparatus, an aerosol was generated with a Collison nebulizer from a known concentration of Mycobacteria chelonae, used as a surrogate for Mycobacterium tuberculosis. Aerosol concentrations were measured with Andersen samplers upstream and downstream of the test masks and respirators, which were heat sealed to a metal plate. Results: Mean efficiencies ranged from approximately 97% for the surgical mask and a dust/mist respirator to more than 99.99% for the high-efficiency particulate air respirator. Measurements of filter efficiency with an Aerodynamic Particle Sizer for the M. chelonae aerosol and independent challenge tests with latex spheres correlated closely with measurements of M. Chelonae collection efficiency determined with Andersen samplers. Conclusions: Analysis of variance and Tukey's method for multiple comparisons indicated that the dust/mist/fume respirator and the HEPA respirator collected M. chelonae with significantly greater efficiency than did either the surgical mask or the dust/mist respirator. Even the least efficient mask tested, however, had a filter efficiency of more than 97% against particles averaging less than 1 mum in aerodynamic diameter.

引用

页码：65 / 74

页数：10

共 17 条

[1]

American Thoracic Society, Medical Section of the American Lung Association: Control of Tuberculosis in the United States, American Review of Respiratory Disease, 146, pp. 1623-1633, (1992)

[2]

Centers for Disease Control, Nosocomial transmission of multi-drug resistant tuberculosis among HIV-infected persons — Florida and New York, MMWR, 40, pp. 585-591, (1991)

[3]

US Department of Labor, Occupational Safety and health Administration. Occupational exposure to bloodborne pathogens, final rule, Federal Register, 56, pp. 64175-64182, (1991)

[4]

Centers for Disease Control, Guidelines for preventing the transmission of tuberculosis in health-care settings, with special focus on HIV-related issues, MMWR, 39, 17 RR, (1990)

[5]

Centers for Disease Control, NIOSH recommended guideline for personal respiratory protection of workers in health-care facilities potentially exposed to tuberculosis, (1992)

[6]

Rockwod, O'Donoghue, The Surgical Mask: Its Development, Usage, and Efficiency, A.M.A. Archives of Surgery, 80, pp. 963-971, (1960)

[7]

Greene, Vesley, Method for ealuating effectiveness of surgical masks, J Bacteriol, 83, pp. 663-667, (1962)

[8]

Andersen, New sampler for the collection, sizing, and enumeration of viable airborne particles., J Bacteriol, 76, pp. 471-484, (1958)

[9]

Dineen, Microbial filtration by surgical masks, Surg Gynecol Obstet, 133, pp. 812-814, (1971)

[10]

Wadsworth, Davis, Filtration efficiency of face masks: the development of a rapid latex filtration efficiency test methdo for use in simulating bacterial filtration efficiency, Filtration Separation, pp. 393-395, (1982)

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