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Performance Evaluation of Antiphospholipid Antibodies on INOVA Quanta Flash System
Background:
The diagnosis of antiphospholipid syndrome (APS) relies predominantly on the laboratory measurement of antiphospholipid antibodies (aPLs). We attempt to verify the analytical performance of anticardiolipin antibodies (aCL) IgA/IgG/IgM and anti-β2-glycoprotein I antibodies (aβ2GPI) IgA/IgG/IgM on a high-throughput automated immunoassay platform.
Methods:
Limit of blank (LOB), limit of detection (LOD), imprecision, and linearity were calculated according to the corresponding Clinical and Laboratory Standards Institute (CLSI) guidelines protocols. The biological reference intervals (RIs) were verified in healthy individuals.
Results:
The LoB of aCL IgA/IgG/IgM and aβ2GPI IgA/IgG/IgM were 0.000, 1.200, 0.200, and 0.400, 1.250, 0.100, respectively. The LoD were 0.093, 1.715, 0.337 and 0.547, 2.174, 0.185 CU, respectively. All the within-run CVs and total CVs were less than the criterion at 10%. The linear analysis showed a good correlation between the predictive values and observed values with correlation coefficients greater than 0.99.
Conclusions:
The BIO-FLASH automated chemiluminescent analyzer performed well in measuring aPLs.
