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 did not indicate a lot specific quality issue.The investigation determined the reported difficulties appear to be related to circumstances of the procedure as it is likely that interaction with the heavily calcified anatomy resulted in the reported difficult to advance/position and thus resulting in the ratchet being unable to properly engage and release the stent from the delivery system resulting in reported activation failure/ deployment failure.During deployment interaction with the heavily calcified anatomy resulted in the reported stretched and material deformation (stent elongated and almost completely fully collapsed).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 the right superficial femoral artery (sfa) with heavy calcification.Access was from the left femoral artery.Atherectomy was performed.The 5.5x150mm supera self-expanding stent (sess) was advanced to the target lesion with difficulty due to the anatomy.During deployment, the the stent elongated and almost completely fully collapsed and the stent partially deployed.The sess, including the stent, was removed without issue.There was no adverse patient effect and no clinically significant delay reported.Another same size supera was used to successfully complete the procedure.No additional information was provided.
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