Udi number: (b)(4).The device was not returned to edwards for evaluation.Attempts to retrieve additional information and device is in process.If additional information is received a supplemental mdr will be submitted.The device history record (dhr) was reviewed and shows that this device met all manufacturing specifications for product release prior to distribution.No issues were identified that would have impacted this event.Although bioprosthetic valves have been proven to have excellent long term durability, failure does occur in a small number of valves.Replacement of a bioprosthetic valve over time is more likely due to structural valve deterioration (svd) which occurs as a result of stenosis (from calcification or host tissue overgrowth), dehiscence, fibrosis or non-calcific degeneration and/or endocarditis.The cause of the event cannot be determined; however, patient factors may have contributed to the event.Edwards will continue to review and monitor all events.Trends are monitored on a monthly basis and if action is required, appropriate investigation will be performed.
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Edwards lifesciences maintains an implant patient registry.This registry is a patient tracking mechanism for serialized edwards implantable devices (bioprosthetic heart valves and annuloplasty rings), rather than a true post-market surveillance registry.Through the registry, edwards is notified when these devices are implanted.In addition, patient and/or device status may be reported to the registry via the implantation data cards.The information is received from various sources (e.G.Surgeon, hospital, and patient family members) and is not received in the form of a conventional "customer complaint." the information reported may or may not be related to the edwards device.In this case, edwards implant patient registry received information a 23mm aortic valve was explanted after an implant duration of nine (9) months due to unknown reasons.A the explanted device was replaced with a 21mm aortic valve.Patient post-operative status noted as in recovery.
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