The customer contacted a siemens customer care center (ccc).An onsite siemens customer service engineer (cse) serviced the advia 2120i hematology system with dual aspirate autosampler and noted that the red blood cell (rbc) rate was inconsistent.Platelets are counted in the rbc channel, and therefore if the rate is inconsistent for rbc, it will be inconsistent for platelets as well since they are counted at the same time.The cse backflushed the flowcell which improved the rbc rate.The cse also inspected the rbc optics and adjusted the pulse width to be within specification.Quality controls (qc) recovered in range after the service intervention and the system was operational.The cause of the falsely low platelet result was the dirty flowcell and/or the rbc optics.The system is performing according to specifications.No further evaluation of this device is required.
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A discordant, falsely low platelet result was obtained on a patient sample on an advia 2120i hematology system with dual aspirate autosampler.The discordant result was reported to the physician(s) and was questioned.The sample was repeated for platelet on an alternate advia 2120i hematology system, resulting higher.The higher result was reported, as the correct result, to the physician(s).There are no reports of patient intervention or adverse health consequences due to the discordant, falsely low platelet result.
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