The device was returned for analysis.The reported material separation was able to be confirmed.The reported difficult/delayed activation and the reported stretched stent was unable to be confirmed due to the condition of the returned device.The reported migration was unable to be replicated in a testing environment as it was based on operational circumstances.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.As there was no damage noted to the device during the inspection prior to use, the investigation determined the reported difficulties appear to be related to circumstances of the procedure as it is likely that during stent deployment movement of the device/stent resulted in the reported difficult/delayed activation and the reported stretched stent.Interaction with the anatomy/other devices and/or inadvertent mishandling resulted in the reported/noted tip material separation.As reported, the tip migrated through the vessel and remains in the patient as no retrieval attempt was made.There is no indication of a product quality issue with respect to manufacture, design or labeling.
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