Evaluation of half-face respirator fit in an Iranian petrochemical company's workers


Mehdi Jahangiri 1 , * , Hossein Mary Oriad 2

1 PhD Student of Occupational Health, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.

2 Department of Occupational Health, Yasuj University of Medical Sciences, Yasuj, Iran.

How to Cite: Jahangiri M, Mary Oriad H. Evaluation of half-face respirator fit in an Iranian petrochemical company's workers, Hormozgan Med J. 2009 ; 13(1):e88628.


Hormozgan Medical Journal: 13 (1); e88628
Published Online: October 28, 2008
Article Type: Research Article
Received: February 16, 2008
Accepted: October 28, 2008


Introduction: The performance of respirator-face piece is depending on a good contact
between the worker's face and the respirator. Improper sealing can cause reduction in
performance of respirators to protect health and safety of workers against risks related to
chemical agents at work. This study is aimed to evaluate the fitness of half-face
respirators and other related factors on it in an Iranian petrochemical industry.
Methods: In this cross sectional study, 54 persons using half mask, in a petrochemical
complex, were evaluated qualitatively by means of Moldex Kit. The effect of staff
training on adjusting and doing seal-check and effects of facial hair and different mask's
brand used in the industry on respirator fit was investigated. The data were analyzed
using Chi-square and McNemar tests by means of SPSS software.
Results: Before intervention 17 (31.5%) of staff out of 54 passed the test. After training,
the results improved from 31.5% to 92.6% (P<0.05). Respirator-face seal in clean-shaven
and bearded employees as well as relation of fit test results to different mask's brand using in
the industry was not significant.
Conclusion: Staff training about providing adequate fit can improve the performance of
selection of respirators. Furthermore, by carrying out fit testing as a part of initial
selection of respirators, it will be possible to check that the mask size and model chosen
fit properly with the face.



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