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More about Allergy Tests:
Definition Purpose Precautions Preparation Aftercare Risks Normal results Abnormal results Resources |
Presence of redness or swelling, especially over 5 mm (1/4 inch) in diameter, indicates an allergic response. This does not mean the substance actually causes the patient's symptoms, however, since he or she may have no regular exposure to the allergen. In fact, the actual allergen may not have been included in the test array.
Following allergen inhalation, reduction in exhalation capacity of more than 20%, and for at least 10-20 minutes, indicates a positive reaction to the allergen.
Gastrointestinal symptoms within 24 hours following the ingestion of a suspected food allergen indicates a positive response.
— Richard Robinson
