VetScan® HM5 Technology
How it Works
The VetScan HM5 Hematology System produces accurate cell counts based on impedance technology. It delivers a 22-parameter CBC analysis, including a 5-part WBC differential and four cellular histograms.
Impedance Technology
- Well tested technology considered so reliable for cell counting that it has long been used in human diagnostic instruments.
- 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)
- EOS Histogram (displays a direct EOS count)
Hemoglobin Determination
Hemoglobin is measured directly through a spectrophotometric reading.