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The customer reported a discrepancy between the initial and external laboratory results.Troubleshooting was performed by reviewing the process; however, the end user was not comfortable sharing their sample-handling process.The end user declined to send the instrument for further evaluation and requested a loaner unit for side-by-side testing.A follow-up was conducted, and the customer reported that after side-by-side testing, they are satisfied with their piccolo and have no additional concerns.The end user did not disclose whether they found the root cause.A review of the batch record for 5401da1 showed that there were no unacceptable readings for potassium during manufacturing and the lot met all release criteria with no deviations.A review of the complaint data identified that there was only one rotor from this lot, reported only from this clinic, for low potassium out of (b)(4) rotors shipped for a complaint rate of (b)(4).There has been no reported patient impact contributing to patient injury or hospitalization.No further action is required at this time.
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