Analysis on performance of two blood corpuscle analysis instruments
WU Xiong-ju · Laboratory Medicine and Clinic · 2009
Objective To analyse the performance characteristics of blood instrument KX-21 and BC-3000.Methods Using blood instrument KX-21 and BC-3000 to detect the same blood samples,and the precision,linearity,contamination rate for carry-over,and comparability of WBC,RBC,HGB,PLT as well as its differant count were observed.Results The precision of the two types of blood instruments can meet the specific requirements.The carry-over rate is low and the relativity is good,so is the linearity.The results of differantial count in normal persons was no difference,while in patients with high neutrophil cells,the accuracy of differantial count detected by instrument KX-21 was higher than that by instrument BC-3000.In leukemia patients,instrument KX-21 has a higher sensitivity and lower false negative rate than that by instrument BC-3000,that is,the results of differantial count detected by instrument BC-3000 are unreliable.Conclusion Inspectors should make themselves master of the performance characteristics of various instruments with particular emphasis on the false-negative cases of differant count,and avoid missing diagnosis and misdiagnosis,so to provide more accurate information for clinic.