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An outside of the united states (ous) customer contacted a siemens customer care center (ccc) to report that a falsely elevated vitamin b12 (vb12) result was generated for a patient sample on an advia centaur xp instrument.Quality controls were in range at the time of the event.A siemens customer service engineer (cse) was dispatched to the customer's site.During the visit, the cse performed sample and reagent probe alignments, cleaned all reservoirs, performed a decontamination, checked aspirate, and dispense ports for any drift, and checked acid and base probe dispense volume.On a subsequent visit, the cse performed a decontamination again, reverified reagent probe, sample probe and ancillary probe alignments, and primed system 4 times.Then the cse checked the dispense port and aspirate probe down alignments, the acid, base priming and verified the volumes.Next the cse changed the reagent probe 1 and 2 valves and replaced ancillary and four aspirate probes.The cause of the falsely elevated vb12 result is unknown.The instrument is performing according to specifications.No further evaluation of this device is required.
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Siemens filed initial mdr 2517506-2023-00097 on 17-mar-2023.Additional information (23-mar-2023): the initial report indicates "the customer was confident with repeat result as it correlated with the results retested at other reference lab and other branch of same center".The customer provided the result obtained at the reference laboratory.The instrument and assay used at the other laboratory are unknown.Additionally, the customer provided the gender of the patient.Furthermore, a precision study was performed on patient samples.Sections a3 and b6 were updated with this information.The instrument is performing according to specifications.No further evaluation of this device is required.
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