Relative Viscosity and Specific Gravity of Human Blood During Cold Storage

摘要

The objective of the research was to explore alterations in physical parameters, such as relative viscosity, specific gravity and density distribution of red cell population when human blood is stored under blood banking conditions for a prolonged period of time. Methods used were: Determination of relative viscosity and specific gravity of blood at various hematocrit concentrations; Separation of red cell population in groups of different densities by centrifugation in the presence of phthalate ester mixtures, Osmotic fragility. It was found that relative viscosity shows an exponential, and specific gravity a linear relationship with red blood cell mass. Changes occur in these two physical parameters as well as in the density distribution. The magnitude of these changes is greater between 21 and 42 days than between 0 and 21 days of storage. (Author)