(b)(4).During processing of this complaint, attempts were made to obtain complete event, patient and device information.A partial udi is being reported because the lot number was not provided.The device was not returned for analysis.A review of the lot history record and complaint history of the reported lot could not be conducted because the lot number was not provided.The investigation was unable to determine a conclusive cause for the reported difficulty.There is no indication of a product quality issue with respects to the design, manufacture, or labeling of the device.
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