Document Detail


In vitro analysis of thermal transport in coronary sinus thermodilution catheters.
MedLine Citation:
PMID:  6685599     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The continuous thermodilution technique for measuring blood flow in the range 50-300 ml/min was evaluated in vitro. Experiments indicated that thermotransport within the catheter from the indicator line to the mixing thermistor exists. The resulting error in calculated thermodilution flow will increase with increasing flow rate. A correction factor for thermal transport, Ft, obtained from a blood circulation model was incorporated in a modified formula for calculation of thermodilution flow. Flows derived with the standard Ganz formula were significantly lower than timed volumetric flows, whereas flows obtained with the modified formula agreed with volumetric flow. The coefficient of variation for four consecutive measurements was 3.4%.
Authors:
E Bålfors; S Häggmark; S Ariola; B Biber; J Pontèn; S Reiz
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Clinical physiology (Oxford, England)     Volume:  3     ISSN:  0144-5979     ISO Abbreviation:  Clin Physiol     Publication Date:  1983 Oct 
Date Detail:
Created Date:  1984-01-07     Completed Date:  1984-01-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8309768     Medline TA:  Clin Physiol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  469-76     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Blood Flow Velocity
Coronary Circulation
Heart Catheterization
Humans
Mathematics
Models, Cardiovascular*
Thermal Conductivity
Thermodilution / methods*

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


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