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This report is being filed to provide additional information in b.5, b.6, d.4, h.6 and h.11.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. alerts that are known to contribute to wbc contamination were not generated in this run data file.As the trima system cannot count the cells entering the platelet product bag, the rbc detector signals must see a significant change in the reflectance values to notify the operator of an lrs chamber saturation and to count the wbcs in the platelet product.In this case, signals did not indicate that wbcs were escaping the lrs chamber.Therefore, the run data file reported that the platelet product could be labeled as leukoreduced.Although the trima system has several methods for detection of possible wbc contamination, it is possible that some events may elude the detection capability of the trima system.Run data file analysis did not show a conclusive root cause for the elevated wbc content in the platelet product reported for this collection.However, it is possible, though not conclusive, that wbcs may have escaped the lrs chamber late in the procedure where the run completed before the system detected the possible contamination.Based on the available information, it is possible, though not conclusive, this failure may be donor related.Root cause: a root cause assessment was performed for this complaint.Alerts that are known to contribute to wbc contamination were not generated in this run data file.As the trima system cannot count the cells entering the platelet product bag, the rbc detector signals must see a significant change in the reflectance values to notify the operator of an lrs chamber saturation and to count the wbcs in the platelet product.In this case, signals did not indicate that wbcs were escaping the lrs chamber.Therefore, the run data file reported that the platelet product could be labeled as leukoreduced.Although the trima system has several methods for detection of possible wbc contamination, it is possible that some events may elude the detection capability of the trima system.Run data file analysis did not show a conclusive root cause for the elevated wbc content in the platelet product reported for this collection.However, it is possible, though not conclusive, that wbcs may have escaped the lrs chamber late in the procedure where the run completed before the system detected the possible contamination.Based on the available information, it is possible, though not conclusive, this failure may be donor related.
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The customer would like the run data file investigated to determine a possible cause for the elevated white blood cell (wbc) content in the platelet product.After the initial quality control, the customer proceeded to filter the platelet component and then performed a new quality control, with satisfactory results.They then proceeded to dispatch the product for transfusion.There was not a transfusion recipient or patient involved at the time of the residual wbc testing, therefore no patient information is reasonably known at the time of the event.Sample id: (b)(6) the platelet collection set is not available for return because it was discarded by the customer.
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