(b)(4).Internal file number - (b)(4): during processing of this complaint, attempts were made to obtain complete event, patient and device information.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.The investigation was unable to determine a conclusive cause for the reported difficulty to deploy (wall apposition).There is no indication of a product quality issue with respect to the design, manufacture or labeling of the device.The 2.25x38mm xience sierra stent referenced is filed under a separate medwatch report.
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It was reported that the procedure was performed to treat target lesions in the 1st obtuse marginal (om1) artery and proximal circumflex artery.A 2.25 x 38 mm xience sierra stent was implanted in the om1.An edge dissection was noted, and a 2.25 x 12 mm non-abbott stent was implanted as treatment.Additionally, the xience sierra stent was noted to be protruding from the obtuse marginal into the circumflex (cx) artery.The protruding end was crushed, followed by angioplasty in the cx artery and in the om1.A 3.5 x 28 mm xience sierra stent was implanted in the proximal cx artery.It was noted that the stent was under-expanded and additional post dilatation was performed, to fully appose the stent to the vessel wall.No additional information was provided.
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