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The investigation has determined that a lower than expected vitros ntbnp ii result was obtained when processing a non-vitros qualab biotech quality control (qc) fluid lot 2510a05423 on a vitros 5600 integrated system.The assignable cause of the event was an issue related to the vitros signal reagent (sr) pack in use at the time of the event.The investigation found that a newly replaced signal reagent had been stored in an area that did not have the correct temperature settings.Temperature monitoring revealed storage conditions exceeded 9 degrees celsius, reaching 10 degrees celsius inside the reagent kit, which likely compromised reagent stability and caused the lower than expected vitros ntbnp ii qc result.According to the vitros signal reagent instructions for use, the packs should be stored at 2 - 8 degrees celsius.It was concluded that the elevated storage temperature likely affected the stability of the signal reagent, resulting in low quality control results.The suspect vitros signal reagent pack was replaced and assay results returned to expectations.The rest of the vitros signal reagent was relocated to a more temperature-stable area, and ongoing monitoring was implemented.Continual tracking and trending of complaints has not identified any signals that would indicate a potential systematic issue with vitros ntbnp ii reagent lot 2080.
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