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CELL-DYN
®
3200 System Operator’s Manual
9140181H—October 2001
Principles of Operation
Flow Cytometry
Section 3
PLT Count
The PLT count is expressed as thousands per microliter (K/µL).
Figure 3.10 PLT Data and Histogram
MPV
The Mean Platelet Volume is derived from the PLT histogram after the PLT count
has been determined. The MPV is expressed in femtoliters.
PCT
The Plateletcrit is the product of PLT and MPV and is analogous to the hematocrit.
It is expressed in percent and is calculated as follows:
PCT = (PLT x MPV)/10
PDW
Platelet Distribution Width is a measure of the heterogeneity of the PLT
population. It is expressed as the geometric standard deviation.
NOTE: Clinical significance has not been established for PCT and PDW.
Therefore, they are not reportable in the U.S.
Platelet Flagging
Refer to the “Operational Messages and Data Flagging” section of this chapter for
PLT flagging information.
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