The surgical patties was returned for evaluation.Device history record (dhr) - there is no indication that the production process may have contributed to this complaint.All test results passed procedural specifications.Failure analysis - product was returned for failure analysis, and the following was performed on the returned unit: the pattie/strip unit was inspected using the unaided eye.The brown spot on the pattie was confirmed.The complaint could be verified through failure analysis.Per the failure analyst: ¿a brown 'spot' was found on a pattie sample around the area of the green string and x-ray.The spot was produced when the x-ray and string were welded to the cottonoid material.The cottonoid is formed from a rayon material.During processing, rayon material is broken down into small fibers.If the fibers are not properly broken down, a small cluster of fibers can result.This creates a thick spot in the pattie.When the string is ultrasonically welded on this spot it absorbs more energy than the rest of the pattie and results in a burn.Automated machines are used to produce 801407 patties.The patties are inspected by a computer vision inspection system that inspects the patties for defects.The burn marks are difficult to detect due to the type of color filters used on the camera lens.¿ currently the complaint issue does not represent an adverse trend, however the issue will continue to be monitored and trended through the complaint evaluation process.The risk remains acceptable per the risk analysis.A corrective action was created to investigate this issue.
|