(b)(4).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 should be noted that the xience prime, everolimus eluting coronary stent system instructions for use (ifu) states: pre-dilate the lesion with a percutaneous transluminal coronary angioplasty (ptca) catheter of appropriate length and diameter for the vessel/lesion to be treated.The deviation of the ifu does not appear to have caused/contributed to the reported difficulties.The investigation determined the reported difficulties appear to be related to circumstances of the procedure as it is likely that during advancement inadvertent mishandling resulted in the reported material separation; thus resulting in the reported difficult or delayed activation/difficult to deploy and inflation problem.A conclusive cause for the reported patient effects, and the relationship to the product, if any, cannot be determined.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 patient presented with inferior wall myocardial infarction and 70-80% stenosis in the right coronary artery (rca).The 3.0x18 mm xience prime stent was attempted to be deployed; however, the pressure was unable to be increased past 8 atmospheres and the stent was not fully expanded.The proximal and distal ends expanded correctly but not the middle portion.The physician changed the inflation device but there was no change.The delivery system was slowly deflated and when the delivery system was withdrawn only the shaft came out and a portion of the shaft remained in the patient.It was attempted to remove the balloon with a snare but it failed.The patient was sent for coronary artery bypass graft (cabg), but during the transfer, the patient experienced shock and was admitted to the icu on a ventilator.No additional information was provided.
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