Document Detail

Effect of breathing pattern on oxygen concentration received from standard face masks.
MedLine Citation:
PMID:  6128496     Owner:  NLM     Status:  MEDLINE    
Standard face masks are widely used for patients who require high oxygen concentrations. A mechanical model was designed to reproduce various respiratory manoeuvres while oxygen was delivered through a standard variable-performance face mask. Over a range of tidal volumes from 300 to 1200 ml and of frequencies from 10 to 30 breaths/min, the received oxygen concentration was lower than the delivered concentration. The disparity between delivered and received oxygen increased with increasing rate and depth of simulated breathing but could be reduced by increasing the flow rate up to 60 l/min. When a turbulent environment was created, the difference between delivered and received oxygen concentrations was exaggerated. Disparities between delivered and received concentrations can be lessened by increasing the flow rate.
R S Goldstein; J Young; A S Rebuck
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Lancet     Volume:  2     ISSN:  0140-6736     ISO Abbreviation:  Lancet     Publication Date:  1982 Nov 
Date Detail:
Created Date:  1983-01-07     Completed Date:  1983-01-07     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  2985213R     Medline TA:  Lancet     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1188-90     Citation Subset:  AIM; IM    
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MeSH Terms
Anoxia / physiopathology,  therapy
Lung / physiopathology
Masks* / standards
Oxygen Inhalation Therapy* / instrumentation
Tidal Volume
Reg. No./Substance:

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