Hematology Analyzer

Hematology analyzers are used in medical laboratories to automatically generate complete blood counts (Figure 1). After the sample is injected, it is mixed with an electrolyte solution. The electrolyte solution is conductive while blood cells are non-conductive. This enables the determination of the total cell count based on the increase in electrical resistance, also called impedance when the cells pass through an electrical field (Figure 2).

Illustration of a hematology analyzer performing a cell blood count. The blood sample with its components goes through a circular electrical field with a positive and negative pole. After the cells go through the field, a graph is represented. The graph represents voltage on the y-axis and time on the x-axis. The function starts when "y" equals 0, and then it depicts a peak in the middle of the graph, which then goes back to 0. The text on the graph says, "1 pulse equals 1 cell".

Figure 1: Schematic representation of cell counting in a hematology analyzer based on electrical impedance.