2020 Volume 11 Issue 2 Pages 98-102
We developed a flow visualization system based on laser Doppler velocimetry, and succeeded in visualizing swirling flow in the chamber as a flow velocity distribution. In this study, 45 wt% glycerin aqueous solution was used to simulate the viscosity of blood with a hematocrit of 35％. The average flow velocity and shear rate in the whole area tended to increase with increasing flow rate of the blood pump. A comparison of the flow velocity distributions and blood coagulation tests confirmed that coagulation occurred significantly for slow flow velocity below 100 mL/min. This method enables investigation of the quantitative relationship between the flow velocity and coagulation.
