The device history record (dhr) review could not be performed because no lot number was available.A sample evaluation could not be performed because no sample was provided.One photo was provided for evaluation.Through the photo, you can see the knot at the end of the tube.The reported condition is confirmed; however, the reported issue could not be found to be related to the manufacturing process.All process and controls were found properly followed.The root cause cannot be determined with the available information, and no action plan is required at this point.The manufacturing site will continue to monitor customer complaints and feedback notifications for adverse trends that require immediate attention.This complaint will be used for tracking and trending purposes.
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