Serum Separator Tube, Plain Red Top Tube, Transfer Tube- Serum
This procedure does not provide serial monitoring; it is intended for one-time use only. Values obtained with different assay methods should not be used interchangeably in serial testing. It is
recommended that only one assay method be used consistently to monitor each patient's course of therapy.
If red-top tube is used, transfer separated serum to a plastic transport tube.