rheumatoid factor…

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what the risks are blood test, rf, test that measures the presence, level of rheumatoid factor, rf, blood, blood is drawn, a vein, on the inside, the elbow, the hand, puncture site is cleaned, antiseptic, an elastic band, around the upper arm to apply pressure, restrict blood flow, the vein, veins below the band to fill, blood, a needle is inserted, vein, blood is collected in an air-tight vial, a syringe, band is removed, restore circulation, once the blood has been collected, needle is removed, puncture site is covered to stop any bleeding, an infant, young child, area is cleansed, antiseptic, punctured, a sharp needle, a lancet, blood collected, pipette, small glass tube, on a slide, onto a test strip, into a small container, cotton, a bandage applied, puncture site, any continued bleeding, no special preparation, infants, children, test depends on child's age, level of trust, prepare child, infant test, procedure preparation, birth to 1 year, toddler test, procedure preparation, 1 to 3 years, preschooler test, procedure preparation, 3 to 6 years, schoolage test, procedure preparation, 6 to 12 years, adolescent test, procedure preparation, 12 to 18 years, the needle is inserted to draw blood, feel moderate pain, others feel only a prick, stinging sensation, some throbbing, rf test is used mainly, in the diagnosis of rheumatoid arthritis, the test result, positive in many other diseases, in healthy people, rf, antibody that attaches to a substance, immunoglobulin g, igg, forming a molecule known, an immune complex, immune complex, activate various inflammatory processes, 80% of patients, rheumatoid arthritis have positive rf tests, less than 60 u/ml, nephelometric method, less than 1, 80 titer, agglutination method, u/ml = units per milliliter, different laboratories might have other reference values, a positive test, chronic hepatitis, chronic viral infection, leukemia, dermatomyositis, infectious mononucleosis, rheumatoid arthritis, scleroderma, systemic lupus erythematosus, additional conditions under which the test performed, adult still's disease, juvenile rheumatoid arthritis, nephrotic syndrome, sjogren syndrome, excessive bleeding, fainting, feeling lightheaded, hematoma, blood accumulating under the skin, infection, a slight risk, the skin is broken, multiple punctures to locate veins, veins, arteries vary in size, obtaining a blood sample.