Why do a blood test for rheumatoid factor

blood test for rheumatoid factor indicated for the diagnosis of rheumatoid arthritis, sarcoidosis, hepatitis, autoimmune disease, systemic disease of acute inflammatory processes.Rheumatoid factor called immunoglobulins specific for the Fc portion of IgG.Normally, their content in the blood should be
essence of the analysis is that if you show up in the blood rheumatoid factor, it will be ready to respond to the "test" of an antibody.Currently, most laboratories use a latex test for rapid diagnosis can be made carbo-globulin sample (carbo-test).The most common laboratory detected a fraction belonging to the immunoglobulin M. Early and pronounced increase of immunoglobulins is considered an unfavorable sign and may indicate a severe course of rheumatoid arthritis.

What if analysis for rheumatoid factor positive

blood rheumatoid factor for determining rent in the morning on an empty stomach (after eight to twelve hours from the last meal) at the time allowed to drink only pure water.It is recommended that the day before blood collection refrain from smoking.Number of Russian Federation sharply increased in systemic manifestations of rheumatoid arthritis.With obvious signs of the disease assay for rheumatoid factor may also be negative and do not change for several months.

result of the analysis can be a positive, not only in rheumatoid arthritis but also and in primary Sjögren's syndrome, diseases with unknown causes - sarcoidosis, various systemic connective tissue disorders (dermatomyositis, lupus erythematosus, scleroderma).A positive result can also cause many chronic infections (syphilis, tuberculosis, chronic hepatitis, malaria), in these cases, the amount of antibodies is significantly lower.

If symptoms similar to symptoms of rheumatoid arthritis, and a positive test result is an urgent need to see a doctor.If the rheumatoid factor is found in a healthy person, it should minimize any risk of the disease, exclude hypothermia, bad habits, get rid of possible foci of chronic infection (sinusitis, dental caries).