The device was returned for analysis.The reported difficult to remove was unable to be replicated in a testing environment as it was based on operational circumstances.The reported material separation stent and the reported activation/deployment failure were unable to be replicated in a testing environment due to the condition of the returned device/stent not returned.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.Reportedly, during removal there was resistance and some force was applied to remove the system.It should be noted that the absolute pro.035 peripheral self-expanding stent system instructions for use (ifu) states: should unusual resistance be felt at any time during lesion or stricture access or delivery system removal, the introducer sheath / guiding catheter and stent system should be removed as a single unit.Applying excessive force to the stent delivery system can potentially result in loss or damage to the stent and delivery system components.Although resistance was noted during removal, the force applied during removal of the device seemed to be a reasonable clinical response to the difficulties.The investigation determined the reported/noted difficulties appear to be related to circumstances of the procedure as it is likely that during removal the delivery system tip inadvertently was caught with the deployed stent; thus resulting in the reported difficult to remove.Manipulation of the compromised device ultimately resulted in the reported stent material separation; thus resulting in the reported activation/deployment failure.Manipulation of the device likely resulted in the noted multiple distal sheath kinks/chatter marks.As reported, the distal portion of the stent was left in the anatomy and secured to the vessel with a new stent.The reported treatment(s) appear to be related to the operational context of the procedure as reportedly the distal portion of the stent was left in the anatomy and secured to the vessel with a new stent.There is no indication of a product quality issue with respect to manufacture, design or labeling.
|