(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 identified no similar incidents from this lot.The investigation determined the reported difficulties appear to be related to circumstances of the procedure as it is likely the device interacted with the mildly tortuous and heavily calcified lesion resulting in the reported difficulty to deploy.There is no indication of a product quality issue with respect to manufacture, design or labeling of the device.
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It was reported that the procedure was to treat a 90% stenosed, mildly tortuous and heavily calcified de novo lesion in the mid left anterior descending artery.The patient presented with unstable angina.After pre-dilating the lesion several times, a 2.75x18mm xience alpine was deployed; however, the stent did not appose well and there was clear dog boning due to calcium.An attempt was made to post- dilate the stent; however, the stent still did not appose to the vessel wall.The patient was sent for coronary artery bypass graft (cabg) surgery and is doing well.No additional information was provided.
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