Abstract
The effects of drag reducing polymers on blood hemolysis during extracorporeal circulation with a prototype roller pump reveal several polymers of both the modified polysaccharide and cellulose types to be capable of effecting significant decreases in red cell breakage at concentrations between 200–500 ppm. First normal stress measurements on dilute solutions of these polymers suggest that the phenomenon may correlate with level of fluid viscoelasticity.
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