Siemens healthcare diagnostics has confirmed the hemoglobin a1c_3/ a1c_3m reagent kit lots 230 ( smn10379673 and 10485591) and 231(smn 1048559) used on the advia 1200, 1650, 1800, 2400, and xpt chemistry systems may demonstrate an increased occurrence of high %hba1c bias.Siemens internal investigation demonstrates reagent lots 230 and 231 may exhibit a positive bias averaging 0.6% hba1c units, ranging from -0.1% to 1.1% hba1c units.The bias was observed when comparing %hba1c means to ngsp pooled patient target-value assigned samples ranging from approximately 5.5% to 8.0% hba1c.The maximum bias was observed at higher %hba1c concentrations.Qc samples may exhibit a similar bias.An urgent medical device correction (umdc) chc-15-19 is being sent to us customers and a urgent field safety notice (ufsn) chc-15-19 is being sent to ous customers in september of 2015.The umdc and ufsn state that customers are to discontinue use and discard reagent kit lots 230 and 231.
|