A visual inspection was performed on the returned stent and the stent dislodgement was confirmed.The reported difficulty to remove was unable to be confirmed due to the returned condition of the device.The reported failure to advance 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 reported from this lot.There was no damage noted to the sds during the inspection prior to use which suggests a product quality issue with respect to manufacture, design or labeling did not contribute to the reported difficulties.The investigation determined the reported failure to advance, difficulty to remove and stent dislodgement appear to be related to operational circumstances of the procedure.Based on the reported information, the stent delivery system (sds) encountered resistance with the anatomy resulting in the failure to advance, likely causing damage to the stent resulting in the difficulty to remove through the guiding catheter.Manipulation against resistance ultimately resulted in the stent dislodgement.The noted stent damages likely occurred during retraction with the snare device.Additionally, the reported treatment appears to be related to the operational context of the procedure as the dislodged stent was retrieved with a snare.There is no indication of a product quality issue with respect to the design, manufacture.
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