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Investigation: the device history records (dhr) were reviewed for this lot.There were no events noted in the dhr that would have contributed to the elevated wbc count experienced by the customer.The run data file (rdf) was analyzed for this event and did not find a conclusive cause for the higher-than-expected wbc content in the platelet product reported for this collection.There were 14 draw pressure low alerts and 3 adjustments to the inlet flow.No unusual process variable was identified and the signals in the run data file indicate that the trima accel system operated as intended.Based on the available information, it cannot be ruled out that the higher-than-expected wbc content in the platelet product could be donor-related.Root cause: a conclusive root cause for the higher than expected wbc content in the platelet product reported for this procedure cannot be confirmed through run data file analysis.While the trima accel system is typically robust against numerous autoflow adjustments from access pressure pauses, it cannot be ruled out that the changes in inlet flow rate, and therefore centrifuge speed and lrs chamber flow rate, disrupted the steady state of the system and contributed to the higher than expected wbc content reported for this procedure.It is also possible, though not conclusive, that this leukoreduction failure may be donor related.A potential reason for this donor related leukoreduction failure may be, but is not limited to, a high wbc count.
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