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The alleged complaint could not be confirmed.Review of the complaint, (b)(4) lot 455390, 3000xxxx lot unk, and x01532xx lot unk, does not reveal evidence of any failure involving these implants.These implants were not returned for investigation, nor was any pictures or additional medical documentation provided to assist in the investigation.(b)(4) lot 455390 was manufactured in 2007.Review of the design history record (dhr) for the subject manufacturing lot indicates that this implant was manufactured to specification.It is unknown when 3000xxxx and x01532xx were manufactured or if they were manufactured to specification due to the unknown lot number.There were no trends found for any of the implants in the complaint.It cannot be concluded what the level of contribution, if any, that the product had to the complaint.No further evaluations can be made without return of the product or receipt of other clinical information.The mpo hip systems package insert (150803-9) lists? dislocation, migration and/or subluxation of prosthetic components from improper positioning, trauma, loss of fixation and/or muscle and fibrous tissue laxity? as a potential adverse effect for total hip arthroplasty implants.Additionally, it also states? periodic, long-term follow-up is recommended to monitor the position and state of the prosthetic components, as well as the condition of the adjoining bone.Periodic post-operative x-rays are recommended for close comparison with early post-op conditions to detect long term evidence of changes in position, loosening, bending, or cracking of components.? mpo will continue to monitor this issue through complaint tracking.Methods: device not returned (4114).Trend analysis (4110).Analysis of production records (3331).Results: no findings available (3221).Conclusions: device met specification.Device was used for treatment.Cause not established (4315).Known inherent risk of device (22).
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