Drucker Diagnostics Paralens Advance - Manual (Page 47)

Section 7
System Performance – QBC AccuTubes
7.1 TEST RESULTS
7.1.1 Digit-Decimal Format
Test values generated by the Autoread Plus analyzer
are displayed in the following units and decimal
formats:
• Hematocrit, % XX.X
• Hemoglobin, g/dL XX.X
• MCHC*, g/dL XX.X
• Platelet Count (PLT), 10 9 /L XXX
• White Cell Count (WBC), 10 9 /L XX.X
• GRANS (abs.), 10 9 /L XX.X
• GRANS (rel.), % XX
• LYMPH/MONO (abs.), 10 9 /L XX.X
• LYMPH/MONO (rel.), % XX
* Mean Corpuscular Hemoglobin Concentration.
MCHC in grams per deciliter of red cells (g/dL)
is equal to MCHC percent (%).
To convert hemoglobin to millimoles per liter,
multiply the value in g/dL by 0.6206 to obtain
hemoglobin in mmol/L.
When testing whole blood, irregularities detected in
length measurement or computed values will cause
the analyzer to display an error flag; in certain cases
the test may be aborted and no results or only
partial results will be displayed.
7.1.2 Operating Ranges
Hematology parameters measured with AccuTubes
by the QBC Autoread Plus analyzer are valid over
the following range of values:
• Hematocrit 15 - 65%
• Hemoglobin 5.0 - 20.0 g/dL
• Platelet Count 20 - 999 × 10 9 /L
• WBC Count 1.6 - 99.9 × 10 9 /L
• Granulocyte Count 0.8 - 70.0 × 10 9 /L
• Lymph/MonoCount 0.8 - 99.9 × 10 9 /L
Results that fall outside these ranges may be
confirmed by alternate methods. Results that fall
outside these ranges will flash on the QBC Autoread
Plus display and will be preceded by an [*] on the
printout.
7.2 TEST LIMITATIONS
Quality medical care requires that laboratory values
be correlated with each patient’s symptoms and
signs by a trained practitioner.
Section 7.1.2 lists the validated upper and lower
limits of the operating range. Values above and
below these validated ranges should be confirmed
by an alternate method.
The AccuTube has been formulated to provide
optimum packing and layering of normal cells. In
a small number of patients, however, the system
cannot read certain parameters and will not report a
value. User errors in processing or use of outdated
or inappropriately stored tubes can also result
in non-reported results. Practitioners must not
assume that unreported values are normal; further
testing with an alternative method is essential.
7-1