Figure 4.

Performance demonstration of the proposed method for given blood flow rates supplied by the syringe pump. (A) Flow rate of blood was controlled as sinusoidal function (Q_Blood = 7 + 5 sin (2πt/83) mL/h). The flow rate of PBS solution was carefully fixed at 5 mL/h. The number of indicating channels filled with blood in the right side channel was designated as N_Blood. (B) Temporal variations of N_Blood for a given flow rate of blood. (C) Relationship between blood flow rate (Q_Blood) and N_Blood (D) Relationship between blood viscosity (μ_Blood) and blood flow rate (Q_Blood). (E) Temporal variations of viscosity (μ_Blood) and flow rate (Q_Blood) of blood were estimated by using the two relationships. (F) Quantitative comparison of viscosity values obtained using the proposed method and the previous method.²⁴