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Test Code:
RF

Order Name:
RA Factor (Rheumatoid Factor)

 
Useful For:
A rapid slide test for the qualitative and semi-quantitative determination of rheumatoid factor in human serum
 
Methodology:
Latex slide Agglutination
 
AliasesName:
RA (Rheumatoid Arthritis) Factor
RF (Rheumatoid Factor)
Rheumatoid Arthritis
 
 
 
Test Code:
RF

Order Name:
RA Factor (Rheumatoid Factor)

 
Collection Specimen Or Container:
Blood/ Plain Blood (Red Top) 6 mL, 1 tube
 
Specimen Testing Type:
Serum, minimum volume 1 mL
 
Sub Mission Container:
Plastic tube
 
Specimen Stabillity:
Specimen Type Temperature Time
Serum Room temperature, 18oC to 25oC 72 hours
 
 
 
Test Code:
RF

Order Name:
RA Factor (Rheumatoid Factor)

 
Method detail:
Latex slide Agglutination
 
Schedule:
Tested Daily (24 hours)
 
Turnaround Time:
Collected specimen to report within 90 mins.
 
Performing Location:
Hematology, Laboratory Department Tel. 17254
 
Specimen Retention Time:
5 days
 
 
 
Test Code:
RF

Order Name:
RA Factor (Rheumatoid Factor)

 
 
Clinical Information:
Rheumatoid factors (RF) are a heterogeneous group of autoantibodies that are associated with the diagnosis of rheumatoid arthritis (RA), but can also be found in other inflammatory rheumatic and nonrheumatic conditions. They can also be detected in some healthy individuals 60 years and older. Despite being nonspecific, the detection of RF or anticitrullinated protein (anti-CCP) antibody, is part of the 2010 diagnosis criterion of the American College of Rheumatology for classification of RA. More than 75% of patients with RA have an IgM antibody to IgG immunoglobulin. The titer of RF correlates poorly with disease activity, but those patients with high titers tend to have more severe disease and, thus, a poorer prognosis than do sero-negative patients.
 
Reference Value:
Negative
 
Interpretation:
Positive results are consistent with but not specific for, rheumatoid arthritis.
 
Clinical Reference:
  1. Manufacturer’s reagent package insert RFslide. Analyticon® Biotechnologies AG Am MÜhlenberg 10,35104 Lichtenfels/ Germany.
  2. http://www.mayomedicallaboratories.com (Retrieved: 22 Jan 2019)