METHOD AND SYSTEM FOR OPTICAL OR ELECTRICAL MEASUREMENTS IN DISPERSE FLUIDS

A method of measuring hematocrit of a blood sample comprising at least red blood cells and blood plasma, comprising the steps of: a) positioning the blood sample in a microfluidic cavity having a resonance frequency, b) subjecting the blood sample to an acoustic standing wave configured for causing the red blood cells to congregate in at least one first region and the plasma to occupy at least one second region, wherein the frequency of the acoustic standing wave is repeatedly varied between a frequency below the resonance frequency and a frequency above the resonance frequency, c) determining a relationship between the volume of the red blood cells in the at least one first region and the volume of the blood plasma in the at least one second region, and d) determining the hematocrit of the blood sample based on the relationship. The invention also relates to a system therefor.