Document Detail


Effects of respirator dead space, inspiratory resistance, and expiratory resistance ventilatory loads.
MedLine Citation:
PMID:  2773947     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effects of respiratorlike inspiratory resistance (IR), expiratory resistance (ER), and dead space (DS) were assessed in a group of 11 normal volunteers during moderate steady-state (SS) and rapidly incremented (RI) exercise. The physiologic effects of IR were predominant, increasing inspiratory time, duty cycle, and several measures of ventilatory work. Effects of DS appear related to increased minute ventilation and include increasing flow rates and duty cycle and requiring greater ventilatory work; during RI exercise, the DS effect became relatively smaller at higher exercise levels. ER compressed expiratory time. These results characterize the response to IR, ER, and DS loads and suggest that DS may be relatively less physiologically significant than IR.
Authors:
P Harber; S Shimozaki; T Barrett; P Losides; G Fine
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  American journal of industrial medicine     Volume:  16     ISSN:  0271-3586     ISO Abbreviation:  Am. J. Ind. Med.     Publication Date:  1989  
Date Detail:
Created Date:  1989-09-27     Completed Date:  1989-09-27     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  8101110     Medline TA:  Am J Ind Med     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  189-98     Citation Subset:  IM    
Affiliation:
Department of Medicine, University of California, Los Angeles 90024.
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MeSH Terms
Descriptor/Qualifier:
Airway Resistance*
Equipment Design
Exercise
Humans
Protective Devices*
Respiratory Dead Space*
Respiratory Protective Devices*
Grant Support
ID/Acronym/Agency:
R0I-OH-2005/OH/NIOSH CDC HHS

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


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