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The University of Chicago Medicine Laboratories

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Specimen Collection and Handling

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Mayo Clinic Laboratories

Test Code TNFA Tumor Necrosis Factor, Plasma


Specimen Required


Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube: Lavender top (EDTA)

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Instructions:

1. Immediately after specimen collection, place the tube on wet ice.

2. Centrifuge at 4° C, 1500 x g, for 10 minutes

3. Aliquot plasma into plastic vial.

4. Freeze specimen within 2 hours of collection.


Secondary ID

63022

Method Name

Electrochemiluminescence

Specimen Type

Plasma EDTA

Specimen Minimum Volume

0.3 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Plasma EDTA Frozen (preferred) 21 days
  Refrigerated  24 hours

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus OK
Heat-treated specimen Reject

Reference Values

≤2.8 pg/mL

Day(s) Performed

Thursday

Report Available

2 to 8 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

83520