Electrochemical impedance spectroscopy has proven to be a highly effective tool for blood analysis. In a recent study, researchers measured the dielectric spectra of human blood across various hematocrit levels using a two-electrode system from 40 Hz to 110 MHz. They discovered that models of erythrocyte shapes like cylindrical, disk-shaped, and biconcave provided comparable results, differing significantly from other shapes. Additionally, they observed that blood conductivity changes over time due to erythrocyte aggregation.