Performance evaluation of the Sysmex XT-2000i advanced hematology analyzer
LI Jin-sh · Shiyong yixue zazhi · 2006
Objective To evaluate the performance characteristics and the use of Sysmex XT-2000i automated hematology analyzer. Methods Blood samples were routinely detected by the Sysmex XT-2000i along with the ACT diff analyzer. The performance characteristics of the Sysmex XT-2000i were compared with those of the ACT diff and the data was analysed statistically. Results Within-and between-batch precision: the CV value of the WBC, RBC, or Hb was less than 4.5%while the PLT CV was 10.8%; Carry-over rate: less than 1.5%; Accuracy: comparison with the setting value P 0.05; Linearity: r 0.999 8; Comparison test: P was greater than 0.05 in WBC, RBC, or Hb but not in PLT; Classification: The CV of both neutrophil and lymphocyte was less than 5.8%and the manual classification-related coefficient r was greater than 0.990 5, but a relatively poor classification was present in monocyte, eosinophil, and basophil. Conclusion The Sysmex XT-2000i hematology analyzer is better in within-and between-batch precision, carry-over rate, accuracy, linearity, and comparison test for WBC, RBC, and Hb and its analytical results are accurate and reliable; Neutrophil, lymphocyte and eosinophil in the classification test have a good correlation with those in the manual reference method while monocyte and basophil only have a moderate correlation.