(b)(4).Report source: (b)(6).No product was returned or pictures provided; visual and dimensional evaluations could not be performed.Review of the device history record(s) identified no deviations or anomalies during manufacturing related to the reported event.The reported products were reviewed for compatibility with no issues noted.Review of complaint history found no additional related issues for this item and the reported part and lot combination.Medical records were not provided.This complaint was not confirmed.A definitive root cause cannot be determined.No corrective actions, preventive actions, or field actions resulted after investigation of this event.If any further information is found which would change or alter any conclusions or information, a supplemental will be filed accordingly.Zimmer biomet will continue to monitor for trends.
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It was reported that approximately two years after primary tka, patient developed an unstable left knee.Following conservative treatment, the surgeon elected to revise the knee.No obvious problems could be found, except for the instability.No infection or synovial inflammation, no obvious ligamentous damage, all components were well fixed.The locking pin and 10x83 as bearing was removed and showed no signs of wear.A 14x83 as bearing and new locking pin was implanted.Knee achieves full extension and well over 90 degrees of flexion.It is worth noting that the patient also has a vanguard tka in the right knee with no problems.Please note the surgeon does not believe the revision is anything to do with the prostheses.No x-rays or operative notes will be supplied.
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