(b)(4).During processing of this complaint, attempts were made to obtain complete event, patient and device information.In the absence of reported part number, the udi cannot be calculated.Implant date - estimate the device was not returned for evaluation.The investigation was unable to determine a conclusive cause for the reported break on the device.A review of the lot history record and complaint history of the reported device could not be conducted because the part and lot number was not provided.The reported patient effect of restenosis is a known observed and potential patient effect as listed in the xact carotid stent system instruction for use.The reported patient effect and the relationship to the product, if any, cannot be determined.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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