An event regarding dislocation involving an uhr head was reported.The event was confirmed via clinician review of the provided medical records.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 by a clinical consultant indicated: this inquiry concerns a patient who underwent a left bipolar hip arthroplasty and at approximately three months after surgery required revision for instability with conversion to a total hip arthroplasty.I can confirm that a dislocation occurred since i was able view an x-ray showing the dislocation.Although i have stickers showing the use of total hip arthroplasty implants, i cannot definitely confirm that it was carried out since i have no operation report or postoperative revision x-ray.The causes of dislocation of a total hip arthroplasty three months after the initial surgery or multifactorial including surgical technique and patient factors.Failure to establish proper soft tissue tension can result in instability.If a posterior approach was used the possibility of disruption of the posterior capsule resulting in positional instability can occur.Also, if a posterior approach is utilized and the patient doesn¿t exercise proper hip precautions, dislocation can occur.I see no causality of the implants themselves.-product history review: review of the device history records indicate devices were manufactured and accepted into final stock with no relevant reported discrepancies.-complaint history review: there have been no other similar events for the lot referenced.Conclusion: a review of the provided medical records by a clinical consultant indicated: this inquiry concerns a patient who underwent a left bipolar hip arthroplasty and at approximately three months after surgery required revision for instability with conversion to a total hip arthroplasty.I can confirm that a dislocation occurred since i was able view an x-ray showing the dislocation.Although i have stickers showing the use of total hip arthroplasty implants, i cannot definitely confirm that it was carried out since i have no operation report or postoperative revision x-ray.The causes of dislocation of a total hip arthroplasty three months after the initial surgery or multifactorial including surgical technique and patient factors.Failure to establish proper soft tissue tension can result in instability.If a posterior approach was used the possibility of disruption of the posterior capsule resulting in positional instability can occur.Also, if a posterior approach is utilized and the patient doesn¿t exercise proper hip precautions, dislocation can occur.I see no causality of the implants themselves.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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