Visual and functional analysis was performed on the returned device.The reported malposition, migration and entrapment in the vessel were unable to be confirmed/tested as the stent had already been fully deployed and was 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 complaints reported from this lot.The investigation was unable to determine a cause for the reported difficulties.It may be possible that the distal sheath was restricted or entrapped within the anatomy causing the stent to "jump" during deployment due to built-up tension within the shaft lumens of the delivery system resulting in a spring like release of the stent; however, this could not be confirmed.The migration may have occurred during the attempt to snare the stent resulting in the stent migrating into the left pulmonary.The additional treatment, foreign body in patient and delay in procedure appear to be due to circumstances of the procedure.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
|
It was reported that the procedure was to treat a left av fistula.An absolute pro self-expanding stent system (sess) was advanced to the lesion; however, upon turning the wheel to deploy the stent, the stent flowered and jumped out.An attempt was made to snare the stent, but the stent migrated into the left pulmonary and became lodged there.Another same sized absolute stent was used to successfully treat the lesion.The patient will be transferred to surgery to remove the foreign body in the left pulmonary.No additional information was provided.
|