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ImmunoCAP Testing

ImmunoCAP testing is preferred to RAST tests. ImmunoCAP is a blood test that can detect specific allergens in the blood. The sensitivity (accuracy) of these tests is about 70%. Therefore, skin test are superior and are presently the preferred tests/gold standard for diagnosis of IgE-mediated allergy. The ImmunoCAP test may be preferable in the following situations:

  • Testing in patients with severe dermatographism or widespread eczema.
  • Testing in patients who are currently taking long-acting antihistamines, tricyclic antidepressants, or medications that may put the patient at risk if they are discontinued.
  • For evaluation of cross-reactivity between insect venom
  • When clinical history suggest a high risk of anaphylaxis from skin testing.
  • To follow patient with food allergies to help determine when food challenges may be performed in an attempt to re-add allergic foods back to the diet.
Immuno CAP Testing vial of blood

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