Trackwise # (b)(4).Analysis of production for ship history conducted: (3331/213/67) a lot history record review was completed for lots 25159142, 25159285, and 25159912 the last 3 lots shipped to the account prior to the event/aware date.There were no ncmrs, rework, or deviations documented for the reported lot number.Based on the dhr/lhr review results, it was determined that there is no relation between the batch manufacturing process and the reported failure.Trend analysis: (4110/213/67) the overall 24 month product complaint trend data for the period nov-2019 through oct-2021 was reviewed.There were no triggers identified for the review period.Communication/interviews: (4111/213/67) communication/interviews were performed to obtain all possible information.Device not returned: (4114/3221/67) despite request and/ or customer indicated that the device would be returned; however, no device was returned.
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