A radioallergosorbent test (RAST) is an allergy test that involves collecting blood. A RAST can be performed when a skin test - the more common allergy test - cannot be done due to a skin problem. Both tests are highly specific, although a skin test is more sensitive, less expensive and produces immediate results.
How is this test performed?
The lab will expose a sample of your blood to different test allergens such as animal dander, grasses, mites, or insects. Allergen-specific IgE antibodies will attach to a substance if you are allergic to it. A radioactive chemical is used in testing to help measure the results.
Uc(Left-sided) since 1992 - Meds - Colazal, Hydrocortisone enemas, Norvasc, Biotin, Forvia...flaring since December 2005
Secondary Raynauds Syndrome since 2004...Fibromyalgia since 2006
Co-mod for Ulcerative Colitis.....Moderator for Allergies/Asthma
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