(b)(4).Customer has indicated that the product will not be returned to zimmer biomet for investigation as device remains implanted.Concomitant medical products: unknown item# unknown femoral head unknown lot # unknown, item# unknown unknown stem lot # unknown.Reported event was confirmed by review of radiographs.Lucency is noted with margins involving the femoral stem suggestive of osteolysis.Device history record (dhr) review was unable to be performed as the lot number of the device involved in the event is unknown.Root cause was unable to be determined.Multiple mdr reports were filed for this event.Please see associated reports : 0001822565 - 2018 - 02610; 0001822565-2018-02613.If any further information is found which would change or alter any conclusions or information, a supplemental will be filed accordingly.Zimmer biomet will continue to monitor for trends.
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