The investigation confirmed that non-reproducible lower than expected vitros creatinine (crea) results were obtained when processing a patient sample on a vitros 3400 chemistry system when compared with the repeat result.The investigation could not determine a definitive assignable cause of the event.The customer did not provide any information regarding which quality control fluid is used for daily testing to evaluate the performance of vitros crea lot 1526-3529-5240.An issue with vitros crea lot 1526-3529-5240 cannot be entirely ruled out.However, the customer did indicate that quality control results were within range for all vitros microslide assays impacted on 20 february 2024.Although no information was provided to assess the performance of vitros crea lot 1526-3529-5240, continual tracking and trending of complaints has not identified any signals that would point to a potential systemic issue with vitros crea lot 1526-3529-5240.Diagnostic within run precision tests do not indicate an issue with the performance of vitros 3450 chemistry as a cause of the event.It is unknown if the customer is following the collection device manufacturer's centrifugation recommendations when processing the patient sample.Therefore, a sample related issue may have contributed to the event.
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