Laboratory Test Information Guide

Details for Rheumatoid Factor, Plasma

Test Name: Rheumatoid Factor, Plasma
Alternate Name(s): RF
RA
Laboratory: Core
Specimen Type: Adult:
4.5 mL Green (Lithium Heparin) top Vacutainer

Pediatric:
0-2 years: 0.5 mL Light Green top (Li-Heparin) Microtainer
2-10 years: 3 mL Light Green top (Li-Heparin) Vacutainer tube
Collection Information: Collect blood aseptically in a Vacutainer tube.

Avoid hemolysis.

Serum from a 5 mL Gold top or 6 mL Red top is also acceptable.
Requisition: GENERAL LABORATORY REQUISITION
Test Schedule: Daily
Turnaround time from when specimen
is received in testing laboratory:
 
Routine
4 hours
Stat
N/A
 
Reference Range: <14 IU/mL
Effective Date: 2010-01-11
Revised Date: 2019-03-12
Critical Value:  
Interpretive Comments:  
Special Processing:  
Comments: Turbidimetric assays not suitable for measurement of highly lipemic or hemolytic samples or samples containing high levels of circulating immune complexes.
Method of Analysis: Turbidimetry
Critical Information Required:  
Storage & Shipment: Specimen is stable for 8 days at 4-8C.
Store at -20oC for longer intervals.
System Codes: 
Cerner
RF
 
Referred To:  

Questions? Comments? Contact Laura Gopaul