Date of event: unknown.Results: investigation summary: samples were received for evaluation by our quality engineer team.Upon examination, the provided samples confirmed the reported defect.A single root cause could not be determined, but the cause may be associated with a perforation station issue, specifically a jam or misalignment.The maintenance plans for the perforation station will be reviewed for the 2018 quality improvement plan.Investigation conclusion: a device history was performed on lot 7244896.There were no non-conformances associated with this defect.Root cause: a single root cause is not fully assignable in this case but it may be associated with a perforation station issue, specifically a jam or misalignment.There were no non-conformances associated with this failure mode for the lot number listed in connection with this complaint.Other actions taken: the maintenance plans of the perforation station are under review in the 2018 quality improvement plan.
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