(b)(4).During processing of this complaint, attempts were made to obtain complete event, patient and device information.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 and treatment appear to be related to circumstances of the procedure as it is likely the device interacted with the challenging anatomy causing the reported failure to advance.Additionally, the device likely interacted with the guiding catheter during retraction causing the reported difficulty to remove and subsequent stent dislodgement with the patient effects of device embedded.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 was to treat a calcified lesion in the proximal circumflex (cx) artery.A radial approach was used to advance the 3.50x28mm rx alpine stent delivery system (sds) to the lesion however the sds failed to cross due to the anatomy.During retraction, resistance was met and the stent dislodged from the balloon.Another device was used to pull the dislodged stent back however it could not enter the sheath.The decision was made to deploy a bare metal stent in the radial artery, embedding the dislodged stent to the vessel wall.A femoral approach was then used to treat the target lesion with another stent.No additional information was provided.
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