Document Detail

Physiologic effects of respirator dead space and resistance loading.
MedLine Citation:
PMID:  7131109     Owner:  NLM     Status:  MEDLINE    
Air-purifying respirators impose several loads on breathing. The effects of inspiratory flow resistance, respiratory dead space such as that of a full-face mask, and moderate exercise and maximal exercise were assessed alone and in combination in nine normal volunteers. There were significant effects on respiratory timing variables (e.g., inspiratory time, inspiratory: expiratory time ratio), peak mouth pressure and peak inspiratory flow rate. Only minimal effects on heart rate were noted. These results suggest that prospective workers who must utilize respirators should be observed during exercise as well as at rest and that a respirator dead space and inspiratory resistance should not produce a significant heart rate change but should lead to adaptation of the inspiratory: expiratory time ratio. Workers who show atypical responses should be assessed particularly carefully.
P Harber; R J Tamimie; A Bhattacharya; M Barber
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of occupational medicine. : official publication of the Industrial Medical Association     Volume:  24     ISSN:  0096-1736     ISO Abbreviation:  J Occup Med     Publication Date:  1982 Sep 
Date Detail:
Created Date:  1982-12-21     Completed Date:  1982-12-21     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  7502807     Medline TA:  J Occup Med     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  681-9     Citation Subset:  IM; S    
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MeSH Terms
Heart Rate
Physical Exertion
Protective Devices*
Respiratory Dead Space
Respiratory Protective Devices*
Tidal Volume
Work of Breathing

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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