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It was reported the patient had a severe acetabular defect and the plan was to use an acetabular augment to support the shell.During positioning of the definitive tm augment, it was pulled out of the wound and dropped on the floor, deeming it unusable.No other augments from the inventory available were suitable for the defect.As such, the surgeon implanted the cup without an augment.Initial stability was suitable, and the patient was close.The following day, the patient dislocated.It was found that the cup had subsided and dislocated.The patient was brought back to theatre to remove the cup and replace it with a larger size.
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(b)(4).Multiple mdr reports were filed for this event, please see associated reports: 0001825034-2024-01194.0001825034-2024-01195.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/radiographs were provided and reviewed by a health care professional.A review of the available records identified findings of the reported issues: severe left hip arthrosis with osseous resorption of the acetabular fossa.Subsequent left hip arthroplasty as noted with dislocation.The reported event was confirmed via medical records.Dhr was reviewed and no discrepancies related to the reported event were found.Implanting the shell without the argument may have caused or contributed to the reported event.A tm augment was initially needed to support the cup, the cup was implanted without the support of the augment which most likely led to the subsequent dislocation.This is considered off-label use per ifu 01-50-1231 page 2 under possible adverse effects " dislocation and subluxation due to inadequate fixation, malalignment, malposition, excessive, unusual and/or awkward movement and/or activity, trauma, weight gain, or obesity and improper positioning.Muscle and fibrous tissue laxity can also contribute to these conditions".Additionally the g7 surgical technique 2336.4-glbl page 1 under contraindications "bone or musculature compromised by disease, infection, or prior implantation that cannot provide adequate support or fixation for the prosthesis".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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