IgE specific Blood and Skin Test work identically
Contributed by Anke Tillman
A RAST (Radioallergosorbent test) is a way of measuring the amount of IgE antibody in the blood stream made against a specific allergen. RAST tests and allergy skin tests give similar information. Both identify IgE antibody (allergy antibody) against materials you might be allergic to. RAST tests must be done by specific methods to be accurate and therefore must be sent to specific laboratories. RAST tests and skin tests each have their advantages and disadvantages. Skin tests may pick up some allergies that would be missed by RAST tests but skin tests have a small risk of precipitating an allergic reaction.