It was reported that the patient underwent a right knee revision surgery due to pain, swelling, elevated metal ions, and infection.The cultures were negative from aspiration.During the surgery, patella extensor disruption, ligament rupture, and migration of patella was noted.It was also noted that there was diffuse synovitis throughout the knee, cerclage wire broken, and 15° flexion contracture.The poly was exchanged without complications.The unknown femur, tibia, and patella remained implanted and were noted to be well fixed.
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This follow-up report is being submitted to relay additional information.No product was returned, or pictures provided; visual and dimensional evaluations could not be performed.Medical records were not provided.Lot identification is necessary for review of device history records, lot identification was not provided.A definitive root cause cannot be determined.If any further information which would change or alter any conclusions or information, a supplemental report will be filed accordingly.Zimmer biomet will continue to monitor for trends.
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