(b)(4).During processing of this complaint, attempts were made to obtain complete event, patient and device information.Date of event: date of event has been estimated.Date of implant: date of implant has been estimated.The udi # is unknown because the part and lot numbers were not provided.The device was not returned for evaluation.The lot history record (lhr) for this product could not be reviewed because the product was not returned for evaluation and the part and lot numbers were not reported.Based on the case information, a conclusive cause for the reported patient effect, and the relationship to the product, if any, cannot be determined.The reported patient effect of thrombosis is listed in the supera instructions for use, as known patient effect associated with the use of the device.There is no indication of a product quality issue with respect to manufacture, design or labeling.
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