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  2. Rheumatoid factor - Wikipedia

    en.wikipedia.org/wiki/Rheumatoid_factor

    There is an association between rheumatoid factor and more persistently active synovitis, more joint damage, greater eventual disability and arthritis. [12] [13] Other than in rheumatoid arthritis, rheumatoid factor may also be elevated in other conditions, including: Systemic lupus erythematosus (SLE) [14] [15] Sjögren syndrome [14] [15]

  3. Rheumatoid lung disease - Wikipedia

    en.wikipedia.org/wiki/Rheumatoid_lung_disease

    The diagnosis of RA was formerly based on detection of rheumatoid factor (RF). However, RF is also associated with other autoimmune diseases. The detection of anti-CCP is currently considered the most specific marker of RA. The diagnosis of rheumatoid lung disease is based on evaluation of pulmonary function, radiology, serology and lung biopsy.

  4. Rheumatoid arthritis - Wikipedia

    en.wikipedia.org/wiki/Rheumatoid_arthritis

    Lyme disease causes erosive arthritis and may closely resemble RA – it may be distinguished by blood test in endemic areas; Reactive arthritis – asymmetrically involves heel, sacroiliac joints and large joints of the leg. It is usually associated with urethritis, conjunctivitis, iritis, painless buccal ulcers, and keratoderma blennorrhagica.

  5. Ristocetin-induced platelet aggregation - Wikipedia

    en.wikipedia.org/wiki/Ristocetin-induced...

    In an unknown fashion, the antibiotic ristocetin causes von Willebrand factor to bind the platelet receptor glycoprotein Ib (GpIb), so when ristocetin is added to normal blood, it causes agglutination of fixed platelets or initiates the initial agglutination phase of aggregation of live platelets. [citation needed]

  6. Reference ranges for blood tests - Wikipedia

    en.wikipedia.org/wiki/Reference_ranges_for_blood...

    Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry"), the ...

  7. Mixing study - Wikipedia

    en.wikipedia.org/wiki/Mixing_study

    Fresh normal plasma has all the blood coagulation factors with normal levels. If the problem is a simple factor deficiency, mixing the patient plasma 1:1 with plasma that contains 100% of the normal factor level results in a level ≥50% in the mixture (say the patient has an activity of 0%; the average of 100% + 0% = 50%). [3]

  8. Blood compatibility testing - Wikipedia

    en.wikipedia.org/wiki/Blood_compatibility_testing

    Blood compatibility testing is routinely performed before a blood transfusion.The full compatibility testing process involves ABO and RhD (Rh factor) typing; screening for antibodies against other blood group systems; and crossmatching, which involves testing the recipient's blood plasma against the donor's red blood cells as a final check for incompatibility.

  9. Serum protein electrophoresis - Wikipedia

    en.wikipedia.org/wiki/Serum_protein_electrophoresis

    The most common causes of polyclonal hypergammaglobulinaemia detected by electrophoresis are severe infection, chronic liver disease, rheumatoid arthritis, systemic lupus erythematosus and other connective tissue diseases. [citation needed] A narrow spike is suggestive of a monoclonal gammopathy, also known as a restricted band, or "M-spike".

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