The RheoScan system can measure rheological properties of blood (i.e., RBC deformability, aggregation, critical stress etc.) at any research and clinical environments by adopting laser-optic and microfluidic technologies. The RheoScan system guarantees the precise and user independent results and the quick and easy handling even at clinical environment. Measurement items include RBC deformability (RSAnD-300 / RSD-300), RBC aggregation, and blood critical stress. Product models include RheoScan-AnD300 (Total integrated hemorheometer), RheoScan-D 300 (RBC deformability and blood critical stress), and RHeoScan-A 200 (RBC aggregation).