Specimen Requirements

Submit only 1 of the following specimens:

Riverside Inpatients and Riverside Campus draw sites:

Testing must be performed within 4 hours of draw if submitting unprocessed whole blood. 

Draw a full, light blue-top (citrate) tube; and send citrated whole blood. Invert several times to mix blood. Forward unprocessed whole blood promptly at ambient temperature only. Do not refrigerate. 

Note: 1. This assay requires its own specimen.

2. Gross hemolysis, icterus, and lipemia may affect results.

3. Anticoagulant therapy will interfere with this test

4. Indicate whole blood on request form.

5. Label specimen appropriately (whole blood).

Outpatients/Outreach Clients

Plasma-Frozen

Draw a full, light blue-top (citrate) tube. Spin down, remove plasma, spin plasma again, and place 1 mL of citrated platelet-poor plasma in plastic vial. (Glass vial is not acceptable.) Pour-off vial should be no more than 2/3 full. Send specimen frozen.

Note: 1. This assay requires its own specimen.

2. Anticoagulant Therapy will interfere with this test

3. Double-centrifuged specimen is critical for accurate results as platelet contamination may cause spurious

    results.

4. Gross hemolysis, icterus, and lipemia may affect results.

5. Indicate plasma on request form.

6. Label specimen appropriately (plasma).