Reported event: an event regarding altr involving a mako stem was reported.The event was confirmed.Through a review of provided medical records with a clinical consultant.Method & results: product evaluation and results: material analysis, visual, functional and dimensional inspections could not be performed as the device was not returned.Clinician review: a review of the provided medical records with a clinical consultant indicated: "conclusion/assessment: a patient underwent bilateral staged tha for oa.The procedures used restoris components, but use of the robot was not described in the op notes.Pins were noted in the or leger.The patient ultimately underwent staged bilateral revisions for altr.The right side was symptomatic, the left side was not (but had radiographic findings).No pre or postoperative records were provided for review, no laboratory values or radiographs were provided for review.Event confirmation: primary tha and revision arthroplasty can be confirmed.The description of the intraoperative findings would point to altr with pseudotumor, but pathology confirmation was not provided.Trunnionosis was only described for the right side.Concomitant infection cannot be confirmed.Root cause: the root cause for the revision surgery was pain on the right and signs of altr with fluid collection and pseudo tumor on the right and left." product history review: review of the device history records indicate devices were manufactured and accepted into final stock.Complaint history review: there have been no other similar events for the lot referenced.Conclusion: it was reported that the patient's left hip was revised due to adverse local tissue reaction.A review of the provided medical records with a clinical consultant indicated: "a patient underwent bilateral staged tha for oa.The procedures used restoris components, but use of the robot was not described in the op notes.Pins were noted in the or leger.The patient ultimately underwent staged bilateral revisions for altr.The right side was symptomatic, the left side was not (but had radiographic findings).No pre or postoperative records were provided for review, no laboratory values or radiographs were provided for review." the exact cause of the event could not be determined because insufficient information was provided.Further information such as return of the device, pathology reports, pre- and post-operative x-rays and the revision operative report as well as patient history and follow-up notes are needed to complete the investigation for determining root cause.No further investigation for this event is possible at this time.If devices and/or additional information become available to indicate further evaluation is warranted, this record will be reopened.
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