The customer reported failed access® accutni+3 calibrations and elevated troponin i (access® accutni+3) results, for one patient, involving the access® accutni+3 reagent used in conjunction with the unicel® dxc 600i synchron® access® clinical system.The customer performed system diagnostics and noted system check passed within specification on all portions.The customer then performed a 10-replicate precision test using low level quality control material and noted results were acceptable and within specification.The customer discontinued analyzing patient samples after observing the discrepant patient results.The customer stated the discrepant results were not released from the laboratory.There was no impact to patient care associated with this event.The patient's sample was collected in a lithium heparin tube and centrifuged at 4,500 rpm (rotations per minute) for five minutes.The patient's sample was loaded through the closed tube aliquotter (cta).The customer indicated no system issues were noted.A beckman coulter field service engineer (fse) was dispatched to assess the instrument.
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There is no indication that the access® accutni+3 device was returned for evaluation.The field service engineer (fse) performed a visual inspection of the instrument and work area and no system issues were noted.The fse proactively replaced the fluidics manifold, the wash pump, the precision pump, and the right side case fan (fan was inoperable).The fse also proactively replaced all the aspirate probes, rebuilt all of the mixer components, and cleaned inside the instrument.The fse verified the vacuum pump operation, the ultrasonics voltage setting, and the mixer speed.The fse also performed all applicable pipettor alignments.The fse noted high sensitivity (hs) system check failed and discovered air in the wash valve.The fse repaired the air leak and noted hs system check passed within specification.Additionally, the fse noted the instrument passed a 15-point precision test without any issues.Quality control (qc) was also acceptable, and the instrument was operating normally.Service activity performed was verified to meet the specified requirements per established procedures.The instrument conformed to the manufacturer's published performance specifications and was returned to normal operation.In conclusion, a definitive cause of the discrepant result is unknown as quality control (qc), system checks, and precision study performed were within assay and instrument specifications.Beckman coulter continues to track and trend any incident related to this issue.
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