The Beneficial Effects of Increasing Blood Viscosity

  • B. Y. Salazar Vázquez
  • P. Cabrales
  • M. Intaglietta
Conference paper


Increased hematocrit above normal levels is usually associated with the elevation of mean systemic arterial blood pressure (MAP) due to increased blood viscosity as shown in studies where hematocrit was increased by 40% or more above baseline [1, 2]. This effect is related to the behavior of pressure in rigid tubes subjected to constant flow, in the presence of varying viscosity. Clinically and physiologically, this situation is encountered with pathologically high hematocrits [3] and in individuals adapted to high altitude with hematocrit levels of 75–91% [4]. Moderate hematocrit changes (and, therefore, changes in blood viscosity) due to variability in the normal population do not appear to affect MAP.


Hemorrhagic Shock Blood Viscosity Plasma Viscosity Plasma Expander Physiol Heart Circ 
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Copyright information

© Springer Science + Business Media Inc. 2008

Authors and Affiliations

  • B. Y. Salazar Vázquez
    • 1
  • P. Cabrales
    • 2
  • M. Intaglietta
    • 1
  1. 1.UCSD-BioengineeringLa JollaUSA
  2. 2.La Jolla Bioengineering InstituteLa JollaUSA

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