RHEUMATOID FACTOR, Quantitative

Mnemonic

RA

Synonym

RF - RA Factor

Specimen Collection Requirements

Collect

Serum or Plasma, one 5.0 mL gold (SST) or 3.0 mL mint green (lithium heparin, PST) top tube

Handling

Allow serum to clot completely at room temperature (minimum: 30 minutes). Centrifuge and separate serum from cells ASAP.

Preferred Volume

1.0 mL

Minimum Volume

0.5 mL

Transport

Refrigerated (2-8°C)

Rejection Criteria

Grossly hemolyzed specimens

Stability

AFTER SEPARATION FROM CELLS: Ambient (20-25°C): 24 hours; Refrigerated (2-8°C): 8 days; Frozen (at or below -20°C): 3 months

Testing Information

Performed

7 days/week

Method

Immunoturbidimetry

Referral Lab

Samaritan Health Services Laboratories

Reference Values

Reference Values

Up to 14 IU/mL

CPT Codes

86431

Last Updated: Thursday, January 5, 2017 03:42:29 AM