· Published by Health Canada · Official notice
| Affected products | Lot or serial number | Model or catalogue number |
|---|---|---|
| UniCel DxI 600 Access Immunoassay System-Total T4 Assay | 538815 | 33805 |
| UniCel DxI 600 Access Immunoassay System-Total T4 Assay | 539243 | 33805 |
| UniCel DxI 600 Access Immunoassay System-Total T4 Assay | 538729 | 33805 |
| UniCel DxI 600 Access Immunoassay System-Total T4 Assay | 538898 | 33805 |
| UniCel DxI 600 Access Immunoassay System-Total T4 Assay | 539107 | 33805 |
Access Total T4 calibrator lots (PN 33805) exhibit a negative bias on DxI 600/800 instruments, with slopes outside product specifications. In the worst-case scenario, there is a medium safety risk associated with this issue due to the potential to cause false low patient results.