RadioAllergoSorbent Test (RAST) is a blood test and therefore requires a blood sample from a vein.
Your doctor may request a RadioAllergoSorbent Test (RAST) in the event of severe allergy, asthma or hayfever, where the precipitating substance (known as an antigen) is not clear. A subgroup of antibodies called IgE antibodies are strongly associated with the abnormal immune system response in allergic reactions. Amongst these IgE antibodies, allergen-specific IgE antibody numbers can be measured by the RAST test.
RadioAllergoSorbent Test (RAST) results are given in terms of an antibody TITRE.
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