(b)(4).During processing of this complaint, attempts were made to obtain complete event, patient and device information.Date of event estimated.Unique device identifier (udi): the udi is unknown because the part and lot numbers were not provided.The device was not returned for evaluation.A review of the lot history record and complaint history of the reported lot could not be conducted because the part and lot numbers were not provided.A conclusive cause for the reported patient effect(s), and the relationship to the product, if any, cannot be determined.The reported patient effect(s) of hypersensitivity is listed in the xience alpine everolimus eluting coronary stent systems instructions for use as a known patient effect(s) of coronary stenting procedures.There is no indication of a product quality issue with respect to manufacture, design or labeling of the device.
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