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[A study of comparison between Technicon THMS H-2 and Hematrak 590].

Using 655 peripheral blood samples from normal individuals and patients, we evaluated the relationship between the measurements of red blood cell (RBC) and white blood cell (WBC) through the Hematrak 590 (Hematrak) and the generated flag systems in the Technicon H-2 (H-2). 1) Among the 12 VAR (Variation) flag positive samples in H-2, 10 samples were obtained from the patients receiving blood transfusions. The samples with high values of HDW (Hemoglobin distribution width) in H-2 seemed to have hypochromatic and polychromatic changes in RBC. 2) Hematrak is likely to be more sensitive than H-2 in discovering atypical lymphocytes (AL). When AL counts in Hematrak were over 5 or 6% of WBC, these results were coincident with ATYP flag positive in H-2. 3) In our examinations, when %Blast in H-2 was over 4%, BLASTS flag always generated positively. We think that H-2 is a tool with high reproducibility for the detection of the blast-like abnormal cells. 4) We evaluated the results of WBC differential count by the three methods of H-2, Hematrak and manual procedures in the peripheral blood samples from normal individuals. We recognized close correlations in neutrophils, lymphocytes and eosinophils (coefficients of correlation = 0.826-0.911), and relatively close ones in monocytes (r = 0.280-0.562), but no correlations in basophils (r = 0.106-0.281). To comprehend the pathophysiological states of the various diseases hematologically, it is necessary to understand the characteristics of the different measurement principles between the two instruments (H-2 and Hematrak).