MyHealth

Manage your account, request prescriptions, set up appointments & more.

LOG IN
Don't have an account
Contact Us

RHEUMATOID FACTOR

Mnemonic

RA FACTOR

Synonym

RF - RA Factor

Specimen Collection Requirements

Collect

Serum or Plasma, one 5.0 mL gold (SST), 7.0 mL red, or 3.0 mL mint green (lithium heparin, PST) top tube

View image for Supply Item Number - 101235 or 101192

Handling

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

Preferred Volume

1.0 mL Serum/Plasma

Minimum Volume

0.25 mL Serum/Plasma, (Whole Blood 0.60 mL minimum draw)

Transport

Refrigerated (2-8°C)

Rejection Criteria

Grossly hemolyzed specimens

Stability

AFTER SEPARATION FROM CELLS: Ambient (18-26°C): 24 hours; Refrigerated (2-8°C): 8 days; Frozen (at or below -20°C): 3 months

Testing Information

Performed

7 days/week

Reported

24 hours

Method

Immunoturbidimetry

Reference Values

Reference Values

Up to 14 IU/mL

CPT Codes

86431

Last Updated: Thursday, January 5, 2017 03:41:35 AM


Client Services: 503-413-1234