The investigation determined that a lower than expected vitros nt-pro-bnp result was obtained from a non-vitros (biorad) quality control fluid when tested on a vitros 5600 integrated system.A definitive assignable cause could not be determined with the information provided.The affected result was isolated to a single vitros nt pro-bnp reagent pack.The issue with the affected reagent pack is unknown, as the pack was discarded by the customer and no further investigation was possible.Based on historical quality control results, a vitros nt pro-bnp lot 2220 performance issue is not a likely contributor to the event and there is also no indication of an instrument malfunction and unexpected instrument performance is not a likely contributor to the event.Additionally, continual tracking and trending of complaints has not identified any signals that would indicate a potential systematic issue with vitros nt pro-bnp reagent lot 2220.Furthermore, a review of production logs for all the individual components in that reagent lot and the assembly into the finished component identified no issues with the production or assembly of the reagent lot that could point to the observed issue.
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