Method: (process evaluation): device history record review.Result: (no failure detected): based on the results of the investigation, all released devices from the associated work order(s), including the suspected device, have been manufactured within the established process parameters; and there is no indication that the manufacturing and processing of the device contributed to the complaint issue.Conclusion: (unable to confirm complaint): based on the complaint history, work order search, product evaluation, medical review and device history record review, a specific root cause of the event could not be determined.(b)(4).
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