(b)(4).During processing of this complaint, attempts were made to obtain complete event, patient and device information.It is indicated that the device is not returning for evaluation; therefore, a failure analysis of the complaint device could not be completed.A review of the lot history record revealed no non-conformances.A query/review of the complaint history of the reported lot did not indicate a manufacturing issue.Based on the information reviewed, there is no indication of a product deficiency.
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