On (b)(6) 2022, customer reported that they were still experiencing positive contamination after hologic serviced the customer¿s panther instrument sn (b)(4) on (b)(6) 2022.Because customer suspected that there was still contamination, customer discontinued the use of the instrument and decided to perform additional investigational testing.Customer then asked hologic to review logs for worklist (b)(4).Customer used assay lot 317818.The worklist contains 81 samples tested and 6 were positive.Hologic field service engineers (fse) went to the customer site, performed a full performance qualification (pq) on panther instrument sn (b)(4) and produced the expected results.Hologic concluded that the discrepant results may have potentially been due to sample mishandling, cross contamination, the presence of a low target, or target degradation due to handling and storage.Fse reported that the customer feels confident that the multiple cleanings have resolved the issue and has continued using the panther instrument.No product impact is known to date.A review of the logs did not reveal instrument issues.
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