15 research outputs found
Comparison of Impedance Platelet Count by Sysmex XE-5000 and Beckman Coulter LH 780 with Optical Fluorescent Platelet Count in Thalassemia Patients
Background: Red blood cell (RBC) abnormalities are frequently found among thalassemia patients and have been
reported to be a cause of spuriously high platelet counts.
Objective: To compare impedance platelet count by Sysmex XE-5000 (PLT-XE) and Beckman Coulter LH 780
(PLT-LH) with optical fluorescent platelet count (PLT-O) in thalassemia patients.
Methods: EDTA blood specimens from 152 thalassemia patients were analyzed by routine mode of PLT-XE and
PLT-LH. The PLT-O run on reticulocyte mode of Sysmex XE-5000 was used as a reference method. Spearman’s
rank correlation coefficient (rs
) and Bland-Altman plot were analyzed.
Results: Correlations between impedance and PLT-O methods were excellent, as demonstrated by rs
of 0.95 and
0.97 for PLT-XE and PLT-LH, respectively. However, there was no agreement between impedance and PLT-O
methods. There were differences in biases of PLT-XE between thalassemia minor and both thalassemia intermedia
and major. Compared to PLT-O, the concordance rates of diagnosis for platelet count abnormality were 94.7% and
96.7% for PLT-XE and PLT-LH, respectively.
Conclusion: Compared to PLT-O, impedance method was associated with spuriously high platelet counts in
thalassemia patients. Careful blood smear examination and/or accurate assay should be used in cases suspected of
spuriously high platelet count