Document Detail

Effects of industrial respirators on respiratory timing and psychophysiologic load sensitivity.
MedLine Citation:
PMID:  3361362     Owner:  NLM     Status:  MEDLINE    
Loads imposed by industrial respirators include inspiratory flow resistance and dead space. Eleven normal subjects were studied at five levels of treadmill exercise (from resting to peak) with and without a respirator surrogate load (single air-purifying cartridge plus 300 ml dead space). Analysis of variance with linear contrasts was used to separate interpersonal from respirator effects. The respiratory pattern was significantly affected, prolonging inspiration, decreasing peak inspiratory flow rates, and increasing tidal volume. Sensitivity to respiratory loads was measured by the magnitude estimation method; the respirator load, but not exercise, decreased load sensitivity. Interpersonal differences in load sensitivity were relatively large. This study suggests that tolerance to respiratory loads similar to those of respirators may be significantly affected by respiratory timing and load sensitivity adaptation. Poor tolerance by some workers might be related to abnormal psychophysiologic load sensitivity.
P Harber; K SooHoo; M Lew
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of occupational medicine. : official publication of the Industrial Medical Association     Volume:  30     ISSN:  0096-1736     ISO Abbreviation:  J Occup Med     Publication Date:  1988 Mar 
Date Detail:
Created Date:  1988-06-02     Completed Date:  1988-06-02     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7502807     Medline TA:  J Occup Med     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  256-62     Citation Subset:  IM    
Dept of Medicine, University of California, Los Angeles 90024.
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MeSH Terms
Adaptation, Physiological
Exercise Test
Lung Volume Measurements
Protective Devices*
Respiratory Function Tests
Respiratory Protective Devices*

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