The device associated with this report was not returned.A search of the complaint database found one prior report for loosening; however, review of the as400 system show that other devices from the reported lot have been delivered and/or invoiced and can be reasonably concluded implanted without issue as no further reports are identified.Requests for additional investigational inputs were made in accordance with wi-7915 appendix a.No additional information was obtained.The investigation could not verify or identify any product contribution to the reported event with the information provided.Based on the inability to identify root cause, the need for corrective action was not indicated.Depuy considers the investigation closed at this time.Should additional information be received, the information will be reviewed and the investigation will be re-opened as necessary.
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