Document Detail

Change in the work of breathing imposed by five anaesthetic breathing systems.
MedLine Citation:
PMID:  6580908     Owner:  NLM     Status:  MEDLINE    
Measurements of pressure and flow in five anaesthetic breathing systems were studied with various fresh gas flows (FGF) using volunteers, and mechanically simulated breathing. Pressure measurements were made at the patient connection and in the neck of the reservoir bag. A pneumotachograph was used to measure flow in the patient connection. The change in the work of breathing imposed by the circuit was derived from the pressure-volume graph and apportioned to stages of the breathing cycle. All the systems studied increased the work of breathing. Expiratory work was always increased more than inspiratory work. The additional work imposed on expiration and the total extra work imposed on breathing were further increased at FGF greater than the minimum clinical requirement.
B Kay; P C Beatty; T E Healy; M E Accoush; M Calpin
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  British journal of anaesthesia     Volume:  55     ISSN:  0007-0912     ISO Abbreviation:  Br J Anaesth     Publication Date:  1983 Dec 
Date Detail:
Created Date:  1984-02-20     Completed Date:  1984-02-20     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372541     Medline TA:  Br J Anaesth     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1239-47     Citation Subset:  IM    
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MeSH Terms
Anesthesia, Inhalation / methods*
Models, Biological
Pulmonary Ventilation
Ventilators, Mechanical
Work of Breathing*

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

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