Neither the device nor films of applicable imaging studies were returned to the manufacturer for evaluation.Therefore, we are unable to determine the definitive cause of the reported event.Although it is unknown if the device contributed to the reported event, we are filing this mdr for notification purposes.If information is provided in the future, a supplemental report will be issued.
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The patient presented with the following pre-op diagnosis: severe degenerative spondylolisthesis l4-5 with foraminal stenosis bilaterally at l4-5 and sciatic pain left sides, degenerative spondylolisthesis, sciatic pain, degenerative disk disease.She underwent the following procedures: posterior lumbar fusion at l4-5 and posterior lumbar interbody fusion at l4-5, decompressive laminotomy and foraminotomy bilaterally, autologous bone graft harvesting, non segmental instrumentation l4-5 with pedicle screw fixation., insertion of biomechanical device, posterior lumbar interbody fusion cage at l4-5 from the left side,use of microscope for the decompressive procedure, platelet tissue graft material for fusion and closure.As per the operative notes: sizing was carried out and an 11 mm high cage was decided upon.X-ray with the 12-gauge in place did show some slightly over distraction on the left side.The 11 mm posterior lumbar interbody fusion cage was obtained.Bone morphogenic protein was obtained and the cage was packed with bone morphogenic protein.Decortication of the endplates was carried out using a bur bilaterally and the autologous bone which was mixed with the bone gel and platelet gel, was packed in, in a piecemeal fashion, also utilizing some infuse bone morphogenic protein.Attention was turned to left side again and decortication and lateral bone graft fusing was carried out using bone bank bone and platelet gel along with the remainder of autologous bone graft.
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