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  • Title: Role of extravascular protein in capillary-tissue fluid exchange.
    Author: Salathé EP, Venkataraman R.
    Journal: Am J Physiol; 1978 Jan; 234(1):H52-8. PubMed ID: 623274.
    Abstract:
    A mathematical model of capillary-tissue fluid exchange is presented. The effect of variation in plasma and interstitial osmotic pressure that occurs as a result of convection and diffusion of protein is examined. Analytic solutions to the resulting equations are obtained by using the methods of perturbation theory. It is found that fluid exchange can significantly alter the pericapillary interstitial osmotic pressure, reducing both filtration and reabsorption. Variation in plasma osmotic pressure is important only for certain pathological conditions in which excessive filtration occurs. Specific numerical examples are presented which show quantitatively the extent of these effects for various normal and pathological conditions of physiological interest.
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