The complaint have been received on (b)(6) 2018.Further informations was requested for investigation.Additional information have been received on (b)(6) 2018 and showed the information regarding the involved lot numbers.It was a two levels implantation.Despite the relaunch for "reveive" the information requested, we don't known if the two level was removed or which of the two lot numbers has been involved.The two lot numbers have been investigate.The first lot mb3575 5258404 was treated in another report medwatch 3004788213-2017-00107.According the additional information received on (b)(6) 2018, this report is performed for the second lot mb3575 5255511.The review of the device history records did not reveal any non-conformances to specifications or deviations in procedures that might have contributed to the reported event.Based on the product history records, the recurrence of this type of event and on the fact that the products couldn't be evaluated, the root cause of the event cannot be determined.Requests for additional information and product return did not receive a response.It could not even be possible to make hypothesis about the root cause of the event.The investigation found no evidence to indicate a device issue.No conclusion can be made with available inputs.Root cause: unknown.Device not returned.
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