Document Detail


Differential and directional effects of perfusion on electrical and thermal conductivities in liver.
MedLine Citation:
PMID:  19964824     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Two different measurement probes--an electrical probe and a thermal conductivity probe--were designed, fabricated, calibrated, and used in experimental studies on a pig liver model that was designed to control perfusion rates. These probes were fabricated by photolithography and mounted in 1.5-mm diameter catheters. We measured the local impedance and thermal conductivity, respectively, of the artificially perfused liver at different flow rates and, by rotating the probes, in different directions. The results show that both the local electrical conductivity and the thermal conductivity varied location to location, that thermal conductivity increased with decreased distance to large blood vessels, and that significant directional differences exist in both electrical and thermal conductivities. Measurements at different perfusion rates demonstrated that both the local electrical and local thermal conductivities increased linearly with the square root of perfusion rate. These correlations may be of great value to many energy-based biomedical applications.
Authors:
Ronald J Podhajsky; Ming Yi; Roop L Mahajan
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference     Volume:  2009     ISSN:  1557-170X     ISO Abbreviation:  Conf Proc IEEE Eng Med Biol Soc     Publication Date:  2009  
Date Detail:
Created Date:  2009-12-07     Completed Date:  2010-04-22     Revised Date:  2014-08-21    
Medline Journal Info:
Nlm Unique ID:  101243413     Medline TA:  Conf Proc IEEE Eng Med Biol Soc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  4295-8     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Biomedical Engineering / methods
Calibration
Electric Conductivity*
Electrophysiology
Equipment Design
Kinetics
Liver / pathology*
Perfusion
Swine
Temperature
Thermal Conductivity*
Transducers
Venae Cavae / pathology

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


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