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Yield shear stress and disaggregating shear stress of human blood
정진무,이병권,신세현 한국유변학회 2014 Korea-Australia rheology journal Vol.26 No.2
This review presents two distinct rheological parameters of blood that have the potential to indicate bloodcirculation adequacy: yield shear stress (YSS) and disaggregating shear stress (DSS). YSS and DSS reflectthe strength of red blood cell (RBC) aggregation in suspension under static and dynamic conditions, respectively. YSS, defined as the critical stress to disperse RBC aggregates under static conditions, was found tobe dependent upon hematocrit, fibrinogen, and red cell deformability, but not temperature. DSS, defined asthe minimum shear stress to disperse RBC aggregates under dynamic conditions, is dependent upon fibrinogen,red cell deformability, and temperature but not hematocrit. Owing to recent advances in measurementtechnology, these two parameters can be easily measured, and thus, their clinical significance in blood circulationcan be verified.