[An outline for applying to human plasma classical theories on the viscosity of colloidal suspensions and macromolecular solutions (Kuhn, Simha, Taylor et al.). (A brief preliminary outline. I)].

This methodological investigation is a formal and short outline of a rheological model for human plasma. Such a model proposal originates from equations and formulae for viscosity of colloidal suspensions and macromolecular solutions established by several authors (R. Simha, G. I. Taylor, W. and H. Kuhn). The model here proposed requires very hard oversimplifications and it may be considered as a semiempirical approach.