Dilution linearity could not be assessed to check for non specific reaction as the patient sample is unavailable.No clinical information is available for the patient.Historical complaint review determined that there is no unusual activity for the likely cause lot and that there is no non statistical or adverse trend for the product.As no patient sample was available for investigation, testing of a serum based panel sample with a target concentration of 3.5 ng/ml, which mimics a patient sample, was performed using inhouse retained kits stored at the recommended storage condition.All specifications were met indicating that lot 41316lf00 is performing acceptably.A review of the manufacturing documentation did not identify any issues associated with the customer observation.A review of labeling concluded that the issue is sufficiently addressed.Based on results of the investigation, the assay performed as intended and no product deficiency was identified.
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