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Test Code RA Rheumatoid Factor, Serum

Performing Laboratory

MaineGeneral Medical Center

Specimen Requirements

Serum

Draw blood in a gold-top (serum separater) gel tube. For pediatric specimens, draw blood in a red-top MICROTAINER(S)®. Label the specimen with the patient's name (first and last), date of birth, date and time of draw and the phlebotomist's initials. Spin down and send 1 mL of serum refrigerated.

 

Specimen stability:

8 hours at room temperature

7 days refrigerated at 2-8°C

3 months when frozen at ≤ -20°C 

 

Minimum volume:

1 mL

 

Specimen rejection criteria:

Grossly hemolyzed or lipemic samples will not be accepted.

Day(s) Test Performed

Monday - Friday

Test Classification and CPT Coding

86431

Reference Values

0-15 IU/mL