Recall Z-1500-2020

Reason for recall

It has been identified that the rheumatoid factor (RF) calibrator values over recover in comparison to the reference material RF serum. This could result in reporting falsely abnormal results which may lead to unnecessary additional serological testing.

FDA-determined cause: Nonconforming Material/Component

Action taken

It has been identified that the Rheumatoid Factor calibrator values, for LK151.S.A lot 428217, over recover in comparison to the reference material RF serum, NIBSC. To address this, the calibrator concentration values for the calibrators (SC151.A - E lot 448765) supplied in this kit have been adjusted to align more closely with the reference material. Due to the adjustment of the calibrator values, users may observe a decrease of approximately 21% in patient results in comparison to results obtained using previous calibrator values. In the absence of adopting these changes identified in the field safety notice, there is a risk, when using the affected kit, of reporting falsely abnormal results which may lead to unnecessary additional serological testing. The recalling firm issued a field safety notice along with an e-back form via email to the firm's US agent in CA on 11/6/2019. The US agent was instructed to send the field safety notice and e-back form to its customer via email. The field safety notice issued provides affected customers with reassigned calibrator values as well as a reassigned target and acceptance range for the quality controls provided with kit lot 428217 of LK151.S.A. The FSN instructs customers to input the adjusted values into the assay parameters on the SPAPLUS instrument instead of those supplied on the QC certificate.