(b)(4).Evaluation summary: a visual and dimensional inspection was performed on the returned device.The reported material deformation and the reported kink were able to be confirmed.The reported failure to advance the device was unable to be replicated in a testing environment as it was based on operational circumstances.Additionally, the distal tip entry was flared and torn.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 did not indicate a lot specific quality issue.The investigation determined the reported difficulties appear to be related to circumstances of the procedure.There is no indication of a product quality issue with respect to design, manufacture or labeling.
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It was reported that the procedure was to treat a heavily tortuous, heavily calcified, 97% stenosis in a segmental lesion in the distal circumflex (cx).There was an unsuccessful attempt to cross the lesion due to an angulation in the proximal portion of the cx.Upon stent removal the distal stent struts were noted to be damaged and the shaft was noted to be kinked.Two smaller stents were implanted through overlap for treatment of the distal cx.There was no resistance noted upon advancement or removal of the device.There were no adverse patient effects reported and no clinically significant delay in the procedure.No additional information was provided.The returned device evaluation revealed that the tip was torn.
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