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(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 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 similar incidents from this lot.The investigation determined the reported difficulties appear to be related to circumstances of the procedure as it is likely the device interacted with the guiding catheter and/or the guiding catheter extender during advancement causing the reported stent dislodgement.There is no indication of a product quality issue with respect to manufacture, design or labeling.
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It was reported that the procedure was performed to treat a target lesion in the diagonal artery.A 6french guide catheter and a 6french guide catheter extension were used.The 2.25 x 12 mm xience alpine stent delivery system was advanced through the guide catheter extension; however, upon exiting the guide catheter extension, the stent was not on the stent delivery system balloon.It was assumed that the stent remained in the guide catheter extension.The guide catheter, guide catheter extension and stent delivery system were removed as a single unit and the stent was found in the guide catheter extension.New devices were prepared and a 2.25 x 12 mm xience alpine stent was deployed at the target lesion without issue.There were no adverse patient effects and no clinically significant delay.No additional information was provided.
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