Reported event: an event regarding loosening involving a trident shell was reported.The event was not confirmed.Method and results: device evaluation and results: a visual, functional and dimensional inspection could not be performed as the device was not returned.Medical records received and evaluation: insufficient information was received fro review with a clinical consultant.Device history review: all devices in the reported lot were manufactured and accepted into final stock with no reported discrepancies.Complaint history review: there have been no other events for the reported lot.Conclusions: the exact cause of the event could not be determined because insufficient information was provided.Further information such as return of device, pre- and post-op xrays, patient history & follow-up notes are needed to investigate this event further.If additional information and/or device become available, this investigation will be reopened.No action is required at this time as there is no indication to suggest a product non-conformity or unanticipated hazard.: not returned to manufacturer.
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