Method: device history review.Results: visual inspection of the returned product confirmed that the ftp has a small cut, however, review of the manufacturing process indicates that a defective plunger could not have been released.Based on the information provided, although possible, it is difficult to determine if the cause of the complaint was a user error.Conclusion: based on the complaint information, product evaluation and device history review, we were unable to determine a specific root cause of the event.(b)(4).
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