MEDICAL TEST HEALTH TERMS LEGAL GLOSSARY

- R -

Radioactive Iodine Uptake Test: This test uses a radioactive tracer and a special probe to measure the tracer absorption (uptake) by the thyroid gland from the bloodstream. During the test, the probe measures the amount of radioactive tracer absorbed by the thyroid gland, using one view. The test can usually show whether the uptake of the radioactive tracer by the thyroid gland is even or uneven. The radioactive tracer commonly used in this test is iodine. Other tracers may be used in different tests. A radioactive iodine uptake test is done to diagnose thyroid function problems, such as hyperthyroidism. An RAIU test may be done at the same time as a thyroid scan.

Rheumatoid Factor (RF) Blood Test: Measures the amount of the RF antibody present in most people with rheumatoid arthritis. Normally antibodies are produced by the immune system to help destroy and eliminate invading bacteria and viruses that can cause disease. However, RF is an antibody that can attach to normal body tissue, resulting in damage. A high level of rheumatoid factor can be caused by several autoimmune diesease (including rheumatoid arthritis) and some severe infections. Occasionally an elevated level of RF is present in healthy people.

Rubella Blood Test: Detects antibodies that are produced by the immune system to help kill the rubella virus. Once produced, the antibodies remain in the bloodstream for years. The presence of certain antibodies indicates a recent infection, a past infection, or that you have been vaccinated against the disease.

• The presence of IgM antibodies indicates a recent rubella infection.
• The presence of IgG antibodies indicates you have immunity against the infection. This immunity can be received either through the vaccination for rubella or a past rubella infection. 

Rubella (also called German measles or 3-day measles) usually does not cause long-term problems. However, a pregnant woman infected with the rubella virus during the first trimester of pregnancy can transmit the disease to her baby (fetus). Serious birth defects called congenital rubella syndrome (CRS) may result. Birth defects of CRS include cataracts and other eye problems, hearing impairment, and heart disease. Miscarriage and a stillbirth are also possible consequences for pregnant women. The vaccination to prevent rubella protects against these complications. A rubella test is usually done for a woman who is or wants to become pregnant to determine whether she is at risk for rubella. Several laboratory methods can be used to detect rubella antibodies in the blood.

DISCLAIMER: The information contained within this personal injury site is of a general nature and is not meant to be a restatement of any rules of law. Your use of this site does not create an attorney-client relationship. You should hire an attorney to obtain legal advice for your specific case. 
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