(b)(4).The device was not returned for analysis.A review of the lot history record revealed no manufacturing nonconformities that would have contributed to this complaint.Additionally, a review of the complaint history identified no similar incidents from this lot.It should be noted that the reported patient effect of prolapse is listed in the xience sierra everolimus eluting coronary stent systems instructions for use (ifu) as known patient effect of coronary stenting procedures.The investigation determined the reported difficult to deploy (wall apposition) appears to be related to the operational context of the procedure.There is no indication of a product quality issue with respect to the design, manufacture or labeling of the device.
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It was reported that this was a percutaneous intervention treating a mid left anterior descending (lad), severely calcified long lesion with heavy plaque burden.A 3.5x38mm xience sierra stent was implanted without issue when prolapsed material was observed through the implanted stent struts, resulting in poor wall apposition.There was no thrombus but rather plaque without any embolization noted.As treatment balloon angioplasty was performed and another stent was implanted.This resolved the issue and the patient remained in stable condition.No additional information was provided regarding this issue.
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