title: Is the blood basophil count sufficiently precise, accurate, and specific?: three automated hematology instruments and flow cytometry compared.
abstract: We compared the performance of the basophil count of 3 hematology instruments with a flow cytometric method (FCM) in which CD123 and CD193 were used as basophil markers. By analyzing 112 patient samples, we found the ADVIA 120 (Siemens Healthcare Diagnostics, Deerfield, IL) and CELL-DYN Sapphire (Abbott Diagnostics, Santa Clara, CA) to underestimate the number of basophils by approximately 50% and the Sysmex XE-2100 (Sysmex, Kobe, Japan) and ADVIA to overestimate the basophil count in some samples with pathologic leukocytes. All 3 instruments had large (25%-50%) analytic within-run coefficients of variation. Compared with the FCM, we found a relatively good correlation for the CELL-DYN basophil count (r = 0.81), an intermediate correlation for the Sysmex (r = 0.64), and a poor correlation for the ADVIA (r = 0.24). When excluding the 52 samples flagged for the presence of pathologic leukocytes, these correlations were found to be 0.84, 0.90, and 0.57, respectively. The basophil count of the 3 instruments is, at least presently, of unsatisfactory quality.
authors.affiliation: Blood Cell Research Group, Department of Medical Biochemistry, Oslo University Hospital, Ullevaal, Oslo, Norway.
authors.forename: Erik K
authors.initials: EK
authors.lastname: Amundsen
authors.forename: Carola E
authors.initials: CE
authors.lastname: Henriksson
authors.forename: Mette R
authors.initials: MR
authors.lastname: Holthe
authors.forename: Petter
authors.initials: P
authors.lastname: Urdal
mesh_terms: D001491:Basophils / Q000166:cytology* / Q000378:metabolism; D015415:Biomarkers / Q000378:metabolism; D005434:Flow Cytometry / Q000295:instrumentation* / Q000379:methods; D006405:Hematology / Q000295:instrumentation* / Q000379:methods; D006801:Humans; D053650:Interleukin-3 Receptor alpha Subunit / Q000378:metabolism; D007958:Leukocyte Count / Q000295:instrumentation* / Q000379:methods; D054397:Receptors, CCR3 / Q000378:metabolism; D015203:Reproducibility of Results
chemical_list: D015415:Biomarkers; C115022:IL3RA protein, human; D053650:Interleukin-3 Receptor alpha Subunit; D054397:Receptors, CCR3