Since the suspected (or event) device was not returned, we inspected the device history record.It was confirmed by reviewing the device history records of the device that there was nothing significant, that it was manufactured normally, and that it passed all the inspections/tests.There is no pt's info, and since it is difficult to reconstruct at that time in the lab and limited info, it is hard to find out exact root cause for this complaint.And the complaints will continue to be monitored for same case.
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