Histograms and Pulse Graphs
Chapter 4 Histograms and Pulse Graphs
4.1 Histograms
This chapter presents several WBC histograms you may encounter frequently.
1. A normal histogram
Figure 4-1
NOTE: Blood cells lain between the first and the second discriminators are
lymphocyte; those between the second and the third discriminators are
mid-sized cells; those between the third and the fourth discriminators are
granulocyte. The fourth discriminator is the fixed line.
2. A histogram that is too narrow to indicate the differential result
Figure 4-2
3. A histogram that does not show differential result because the WBC result is
less than 0.5.
Figure 4-3
4. A histogram that does not show differential result because the peak is in the
middle of the histogram.
Figure 4-4
5. A histogram that does not show differential result because of increased
nucleated erythrocytes, or interference or inadequate hemolysis
BC-2800 Auto Hematology Analyzer (V1.0) 4- 1
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