Document Detail


A velocity profile equation for blood flow in small arterioles and venules of small mammals in vivo and an evaluation based on literature data.
MedLine Citation:
PMID:  19996521     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
An empirical parametric equation with 2 bluntness parameters was introduced for describing the velocity profile of blood in the small arterioles and venules of small mammals, in vivo, with the basic approximations of the axisymmetric flow in cylindrical geometry, zero velocity at the wall and a blunter than parabolic flow profile. The purpose was to evaluate the usefulness of this equation in describing the velocity profile and in estimating the volume flow when only one velocity measurement is available near the vessel axis. The equation was tested on 17 velocity profiles (9 arteriolar and 8 venular) previously measured by particle image velocimetry (PIV) techniques, at diameters ranging from 17 to 38.6 microm. The correlation coefficients of each experimental profile were higher than 0.96. The average relative error-bias measured at 10 radial segments ranged between -5% to 1%, leading to an average relative volume flow estimation error for all the 17 velocity profiles of -1.8% with a standard deviation of 4.3%.
Authors:
Aristotle G Koutsiaris
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Clinical hemorheology and microcirculation     Volume:  43     ISSN:  1875-8622     ISO Abbreviation:  Clin. Hemorheol. Microcirc.     Publication Date:  2009  
Date Detail:
Created Date:  2009-12-09     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9709206     Medline TA:  Clin Hemorheol Microcirc     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  321-34     Citation Subset:  IM    
Affiliation:
Hemodynamics Laboratory, Department of Vascular Surgery, Faculty of Medicine, University of Thessaly, 9 Miauli St., Larissa, Greece. ariskout@otenet.gr
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