An event regarding loosening involving a trident shell was reported.The event was not confirmed.Method and results: device evaluation and results: not performed as the device was not returned.Medical records received and evaluation: not performed as medical records were not provided.Device history review: review indicated all devices were manufactured and accepted into final stock with no reported discrepancies.Complaint history review: review indicated there have been no other events for the reported lot.Conclusions: the exact cause of the event could not be determined because the devices were not returned and insufficient information was provided.Additional information, including operative reports, progress notes, x-rays and return of the device are needed to fully investigate the event.If further information becomes available or the product is returned, this investigation will be re-opened.
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