(b)(4).During processing of this complaint, attempts were made to obtain complete event, patient and device information.Concomitant medical products: guide catheter: 6f; 2.5x38mm and 2.5x12mm xience sierra stents; heparin.The stent remains in the patient.Investigation is not yet complete.A follow up report will be submitted with all relevant information.
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It was reported that on (b)(6) 2018, the patient presented with a recent non-st elevated myocardial infarction (nstemi).A percutaneous intervention was initiated and a predilatation was performed in the proximal right coronary artery (rca), heavily calcified lesion.A 2.5x38mm xience sierra stent was implanted.Post-implantation, an edge dissection was noted.As treatment, a 2.5x12mm stent was implanted.Following, a 2.75x15mm xience sierra, advanced to the rca.Due to the lesions severe calcification, the stent jumped during placement and was implanted too distally, however, still remained at the lesion site.As treatment, another stent was implanted, overlapping the 2.75x15mm xience sierra, to cover the entire lesion site.The event resolved.No additional information was provided regarding this issue.
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Internal file number - (b)(4).The device was not returned for analysis.A review of the lot history record identified no manufacturing nonconformities issued to the reported lot that would have contributed to this event.Additionally, a review of the complaint history identified no other incidents from this lot.The investigation determined the reported difficulties and treatment appear to be related to circumstances of the procedure as it is likely the device interacted with the heavily calcified lesion causing the stent to move during placement (inaccurate delivery) and additional therapy/non-surgical treatment.There is no indication of a product quality issue with respect to manufacture, design or labeling.
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