Samples were not received for the investigation.A device history record review could not be performed because a lot number was not received with the complaint.As part of our manufacturing process, all device history records are reviewed and approved by quality, prior to release of product.Because a sample was not returned, we were unable to perform a follow up investigation to include functional and visual evaluations to confirm the reported issue and determine the root cause.However, a quality alert was issued to the production personnel for awareness notification and a corrective and a corrective and preventive action has been initiated to address the reported issue.
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