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 identified no other similar incidents from this lot.It is possible that during advancement the inflation/deflation lumen became compromised (bent/kinked/stretched) thus compromising the inflation/deflation lumen resulting in the reported activation failure/expansion failure, deflation problem and the reported entrapment of device; however this cannot be confirmed.The investigation determined a conclusive cause for the reported activation failure including expansion failures and deflation problem cannot be determined.The reported material deformation and material separation appear to be related to circumstances of the procedure as attempts to remove the entrapped device resulted in the reported material deformation and ultimately resulted in the reported material separation.The treatments appears to be related to the operational context of the procedure.There is no indication of a product quality issue with respect to manufacture, design or labeling.The xience xpedition 48 is currently not commercially available in the us; however, it is similar to a device sold in the us.The (b)(4) referenced is filed under a separate medwatch report number.
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It was reported that during a left anterior descending and left circumflex coronary artery intervention that was mildly tortuous and 90% stenosed, after pre-dilatation, the 2.75x48mm xience xpedition stent was advanced to the lesion and stent deployment initiated; however, during balloon inflation, the balloon would not go past 6 atmospheres (atm) and then failed to deflate.The device was attempted to be removed; however, it became stuck and the shaft separated.The stent became shortened but remained on the delivery system in the patient.A 2.5x12mm nc trek was advanced to assist with removal of the stent delivery system; however, that device also became stuck and the shaft separated.The patient was sent for coronary artery bypass graft surgery, where the devices, including the stent, were successfully removed.There was no additional information provided.
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