VetScan HM2™ Technology
How it Works
The VetScan HM2 Hematology System is designed based on impedance technology. It offers an 18-parameter CBC analysis, including a 3-part WBC differential and three cellular histograms.
Impedance Technology
- Electrically neutral blood cells pass through an electrically charged aperture generating a "pulse".
- Cell counts are determined by the number of pulses measured in a given volume of blood over a set period of time.
- The decrease in electrical conductance (degree of intensity) as measured is directly proportional to the cell volume.
- This size discrimination along with susceptibility to various lysing agents distinguishes the basic cell types (red, white, and platelet).

Histograms
- RBC/PLT histogram
- WBC histogram (differential results generated by size determination)

Hemoglobin Determination
Hemoglobin is measured directly through a spectrophotometric reading.