(b)(4).During processing of this complaint, attempts were made to obtain complete event, patient and device information.The stent remains in the vessel; the delivery system was not returned to abbott vascular 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 similar incidents reported from this lot.A cine was received and reviewed by an abbott clinical specialist.The reviewer concluded that the 4.0x18 sierra stent deployed in the proximal lad migrated proximally requiring additional percutaneous coronary intervention (pci) distally, where another stent was implanted.The investigation was unable to determine a conclusive cause for the reported stent movement.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 during a procedure of the proximal left anterior descending (lad) artery, during stent deployment, the 4.0 x 18 mm xience sierra stent moved proximally, resulting in the stent implanting and missing the distal portion of the lesion.A different 4.0 x 8 mm xience sierra stent was implanted in the distal lesion segment.Excellent angiographic result was achieved.There was no reported adverse patient effect or a clinically significant delay in procedure.No additional information was provided.
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