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RESEARCH PAPERS

Interaction of Fluid Movement and Particle Diffusion Across Capillary Walls

[+] Author and Article Information
Eric P. Salathé, R. Venkataraman

Center for the Application of Mathematics, Lehigh University, Bethlehem, Pa. 18015

J Biomech Eng 104(1), 57-62 (Feb 01, 1982) (6 pages) doi:10.1115/1.3138304 History: Received May 13, 1981; Online June 15, 2009

Abstract

The rate of transcapillary exchange of substances delivered to or removed from the tissue by blood depends on the concentration difference across the capillary wall. This concentration difference results in an osmotic effect that can have considerable influence on capillary-tissue fluid exchange. However, fluid exchange also affects the plasma and tissue concentrations of the various substances. Therefore, the determination of substrate concentration profiles involves an interaction of many microcirculatory phenomena, including capillary-tissue fluid exchange. In this paper a general mathematical model is presented that describes the interaction of multiple exchangeable solutes. The resulting equations are solved to give the concentration profiles of different substances and their effect on fluid exchange for various normal and pathological situations of physiological interest.

Copyright © 1982 by ASME
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