Two (2) samples of 2 different patients were investigated by the manufacturer.Patient 1: the high ft4 value, generated at the customer site, was confirmed at roche diagnostics.No assay interfering factors could be detected regarding the observed differences in ft4 values generated with the roche assay and siemens centaur assay.Patient 2: an interfering factor was detected in the sample.In rare cases, interference due to extremely high titers of antibodies to analyte-specific antibodies, streptavidin or ruthenium can occur.These effects are minimized by suitable test design.For diagnostic purposes, the results should always be assessed in conjunction with the patient¿s medical history, clinical examination and other findings.No product problem could be found.
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