The device was not returned to the manufacturer for physical evaluation, and the lot number was not able to be obtained to date.Therefore, the failure mode cannot be confirmed.A manufacturing review was performed of the products shipped to the dialysis center for the three (3) month time frame which immediately preceded the event occurrence date.This review included the lot numbers for all fresenius bloodlines shipped to this account within the selected time frame.A records review was performed on the lots identified.An investigation of the device manufacturing records was conducted by the manufacturer.There were no deviations or non-conformances during the manufacturing process.In addition, the batch record review confirmed the labeling, material, and process controls were within specification.A review of the batch production records did not reveal a probable cause for the customer complaint.There were no non-conformance reports or other abnormalities that relate to the reported event, during the assembly of the related lots.All lots met release criteria.
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