Readdressing the issue of thermally significant blood vessels using a countercurrent vessel network

Journal of Biomechanical Engineering
Devashish Shrivastava, Robert B Roemer

Abstract

A physiologically realistic arterio-venous countercurrent vessel network model consisting of ten branching vessel generations, where the diameter of each generation of vessels is smaller than the previous ones, has been created and used to determine the thermal significance of different vessel generations by investigating their ability to exchange thermal energy with the tissue. The temperature distribution in the 3D network (8178 vessels; diameters from 10 to 1000 microm) is obtained by solving the conduction equation in the tissue and the convective energy equation with a specified Nusselt number in the vessels. The sensitivity of the exchange of energy between the vessels and the tissue to changes in the network parameters is studied for two cases; a high temperature thermal therapy case when tissue is heated by a uniformly distributed source term and the network cools the tissue, and a hypothermia related case, when tissue is cooled from the surface and the blood heats the tissue. Results show that first, the relative roles of vessels of different diameters are strongly determined by the inlet temperatures to those vessels (e.g., as affected by changing mass flow rates), and the surrounding tissue temperature, but not by th...Continue Reading

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Citations

Jul 31, 2009·Journal of Biomechanical Engineering·Devashish Shrivastava, J Thomas Vaughan
Nov 22, 2013·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Devashish ShrivastavaJ Thomas Vaughan
Oct 31, 2007·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Devashish ShrivastavaJ Thomas Vaughan
Apr 19, 2007·Physics in Medicine and Biology·Maciej StańczykAnton A Van Steenhoven
Mar 16, 2012·Interface Focus·Piotr OrlowskiStephen Payne
Jun 7, 2013·International Journal of Hyperthermia : the Official Journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group·H Petra KokJohannes Crezee

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