11-20
CELL-DYN
®
3200 System Operator’s Manual
9140181H—October 2001
Quality Control
Quality Control Guide
Section 11
Cembrowski suggests that the results for all three levels first be checked to see if
they are within their 2SD limits. If all three levels meet this criterion, the
instrument is in control.
If any control result exceeds the 2SD limits, check to see if it exceeds the 3SD
limits. If a result exceeds 3SD, there are two possibilities. There is either an
instrument problem or a problem with the particular level of control. Therefore, if
a result exceeds 3SD, run another bottle of that control. If the problem persists, then
additional investigation is required.
Check to see if either the 2 of 3
2s
or R
4s
rules have been violated for any level or
across levels. If the problem is confined to one level of control, check for a 2
2s
rule
violation for that level. Again, if the violations are confined to one level of control,
use another bottle and possibly another lot. Check expiration dates and data entry.
Check to be sure that the control is run into the correct file.
If a combination of rules has been violated across the three levels, determine
whether the violations indicate a loss of precision or a loss of accuracy and
troubleshoot accordingly. If necessary, call the Abbott Hematology Customer
Support Center for assistance.
When the problem has been resolved, Cembrowski suggests that all levels be run
again in duplicate to confirm that it has in fact been corrected.
X-B Analysis
Introduction
X-B Analysis is an automated means of monitoring instrument performance by
using the known stability of the red cell indices. The following values confirmed
the values that Bull published in an earlier study
5,6,7
. Consequently, these values
can be used as the Target Values to initiate the X-B Analysis program.
MCV 89.9 fL
MCH 30.5 pg
MCHC 33.9 g/dL
To enter X-B Target Values in the
SET UP
menu for MCV, MCH, and MCHC, do
the following:
1. In the
SET UP
menu, press
[QC SET UP MENU]
followed by
[X-B SET UP]
.
2. If necessary, press
[TURN X-B RBC ON]
to turn the X-B RBC program ON.
3. Use the arrow keys to move the cursor to the Target Value column and type
in the following:
“89.9” for MCV and press Enter
“30.5” for MCH and press Enter
“33.9” for MCHC and press Enter
4. Press
[RETURN]
to exit the
X-B SET UP MENU
and return to the main
QC SET
UP
menu.
