Rheumatoid Factor RF

Synonyms

Allscripts (AEHR) Order Name

Rheumatoid Factor Quant, Serum or Plasma

Sunrise Clinical Manager (SCM) Order Name

Rheumatoid Factor Quant, Serum or Plasma

Clinical Info

Aids in the workup of suspected rheumatoid arthritis or undifferentiated inflammatory arthritides. Consider ordering this test in conjunction with Cyclic Citrullinated Peptide (CCP) to increase specificity and sensitivity.

Specimen Type

Blood

Container

Gold Top Tube

Collection Instructions

Submit only 1 of the following specimens:
Preferred:  Serum
Container/Tube:  Gold-top tube(s)
Specimen:  1 mL of serum
Transport Temperature:  Refrigerate
Collection Instructions:
Note:  1. Indicate serum on request form.
2.  Label specimen appropriately (serum).
Alternate: Plasma
Container/Tube:  Green-top (lithium heparin) tube(s), green-top (sodium heparin) tube(s), or lavender-top (K3 EDTA) tube(s)
Specimen:  1 mL of lithium heparin, sodium heparin, or EDTA plasma
Transport Temperature:  Refrigerate
Collection Instructions:
Note:  1. Indicate plasma on request form.
2.  Label specimen appropriately (plasma).
Stability:  24 hours room temperature
                  3 days refrigerate
                  4 weeks frozen
 
 

Transport Instructions

Refrigerate

Specimen Stability

24 hours room temperature
                  3 days refrigerate
                  4 weeks frozen
 
 

Methodology

Immunoturbidimetric

Days Performed

Monday through Sunday

Performing Laboratory

Northwell Health Laboratories

CPT

86430

PDM

5700061

Result Interpretation

≤13  IU/mL

Forms