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There were multiple lot numbers reported to be involved.The information for each lot number is as follows: medical device lot #: 5174083; medical device expiration date: 06/30/2020; device manufacture date: 07/28/2015 ; medical device lot #: 4205157; medical device expiration date: 07/31/2019; device manufacture date: 08/22/2014.Investigation summary: our quality engineer inspected the returned unit and confirmed the reported observation.The source of the defect could not be determined.There was an indication of adhesive transferred from the top web to the bottom web on the opened seal area which was present on all the returned sample and thus, showed that the sealing process was completed in the manufacturing facility.A device history record review showed no non-conformances associated with this issue during the production of the reported batches.Customer complaint trends are evaluated on a monthly basis.If the trend of a specific type of complaint warrants a formal corrective action, resources will be assigned at that time.Investigation conclusion: 10 actual samples in opened packaging, from 3 different batches, were returned for investigation.Refer to figure 1.The details are as below: (b)(6).Batch number 5174083; batch number 4205157; batch number 4314498.Actual samples: the actual samples were subjected to visual inspection.Opened seal was observed on all the returned samples.Refer to figure 2.Batch 5174083; batch 4205157; batch 4314498; opened seal; opened seal was observed on all the returned samples.Root cause description: there is an indication of adhesive transferred from the top web to the bottom web on the opened seal area, refer to figure 3, which was present on all the returned sample and thus, showed that the sealing process was completed in manufacturing facility.Batch 5174083; batch 4205157; batch 4314498; figure 3: indication of adhesive transfer therefore, no assignable root cause can be established.Rationale: there is an indication of adhesive transferred from the top web to the bottom web on the opened seal area which was present on all the returned sample and thus, showed that the sealing process was completed in the manufacturing facility.
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