(b)(4).The device was not returned for evaluation.Based on the case information and related record review, a conclusive cause for the reported patient effects, and the relationship to the product, if any, cannot be determined and the treatment appears to be related to the circumstances of the procedure.The reported patient effects of transient ischemic attack and thrombosis, as listed in the xact carotid stent system instruction for use are known adverse events associated with the use of a coronary scaffold in native coronary arteries.Based on the information reviewed, there is no indication of a product quality issue with respect to manufacture, design or labeling.
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