Sysmex XP-300 9-5
Quality Control
Revised May 2014
9.2 Control methods
This instrument has following 2 quality control methods. Choose the
control method in accordance to your laboratory’s internal
regulations.
X
control
The X
control uses control blood (EIGHTCHECK-3WP) to monitor
an instrument’s performance over time.
In X
control, control blood is subjected to 2 consecutive analyses and
the mean of them is used as the QC data. Therefore the imprecision
of the analysis has only a small impact on the QC data.
Levey-Jennings (L-J) control
Unlike the X
control that is subjected to 2 consecutive analyses and
the mean of them is used as the QC data, the L-J control uses the data
from a single analysis of control blood as QC data.
Therefore the imprecision of the analysis has a stronger impact on
the QC data than with the X
control method so that the control
thresholds are wider (or: have a higher range) compared to the
X
control method. An instrument’s performance over time can be
monitored by conducting the L-J control 2 or more times during daily
operation.
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