Drucker Diagnostics QBC STAR Dry Hematology Analyzer - Manual (Page 43)

6000-300-000 5–3
5 – Performance and Limitations
Parameter
Correlation
Coefficient
Slope Intercept
QBC
Mean
Cell
Counter
Mean
Range of
Values
Number
of
Samples
Hematocrit (%) 0.983 0.973 2.572 36.5 34.8 15.7 – 61.7 646
Hemoglobin (g/dL) 0.984 0.982 0.387 12.1 12.0 5.2 – 18.5 638
Platelet (x 10 9 /L) 0.962 0.935 17.701 244 242 23 – 913 558
WBC (x 10 9 /L) 0.974 1.124 –0.936 10.4 10.1 1.6 – 92.9 535
Granulocyte (x 0 9 /L) 0.972 0.991 0.152 7.0 7.0 0.8 – 45.0 535
Lymph/Mono (x10 9 /L) 0.987 1.206 –0.419 3.3 3.1 0.8 – 89.9 535
the hematocrit results shown above reflect the calibration methods of the Coulter or Sysmex analyz-
ers used in the correlation study. the QBC Star software has been calibrated to match the interna-
tional reference standard for microhematocrit (MHCt) technology. the data shown in the table below
was obtained by comparing the QBC Star results against the microhematocrit reference method.
12
Interfering Substances
• Hemolysis: Do not perform tests on visibly hemolyzed blood specimens.
• Bilirubin: No effects on test results have been observed at bilirubin concentrations up to 20
mg/dL. 8
• Triglycerides: No effects on test results have been observed at triglyceride concentrations up
to 1,800 mg/dL. 8
• Coumadin: Anticoagulant therapy has been shown to have no clinically significant effect on
performance. 8
• Doxorubicin: Treatment with the anthracyclic drug Doxorubicin does not appear to interfere
with the QBC test method. 8
• Other Drugs: The effects of other potentially interfering drugs and their metabolites on QBC
tests have not been established. 9, 10
6000-300-000 5-3
* Products of Coulter Electronics, Hialeah, FL and tOa Medical Electronics, Kyoto, Japan.
Parameter
Correlation
Coefficient
Slope Intercept
QBC
Mean
Cell
Counter
Mean
Range of
Values
Number of
Samples
Microhematocrit (%) 0.986 1.023 –0.650 36.5 36.3 15.7 – 61.9 646