Analytical Performance Assessment of the Prothrombin Time and Activated Partial Thromboplastin Time Tests by Roche Cobas t511 Coagulation Analyzer

Aim and objective:The study aims to evaluate the performance of a newly installed fully automatic coagulation analyzer Roche t511. Materials and methods:The prothrombin time (PT), activated partial thromboplastin time (aPTT), and international normalized ratio (INR) values obtained from 150 patients by a Roche t511 were compared with those obtained by Siemens Sysmex CS 2000i.Coagulation assays were performed under routine conditions using standard reagents and an analyzer.Reference intervals were established using 2.5th and 97.5th percentiles for hematologic analytes and minimum and maximum values for coagulation tests.Results: In our study, within-and between-run precision CVs for PT and aPTT in Cobas t511 analyzer were excellent according to the criteria for acceptance.Reference intervals are reported.Conclusion: The data reported here show that the PT and aPTT assay on the t511 fully automated analyzer is highly sensitive, accurate, and specific for the measurement of hemostasis.