Epikutantestung

Epikutantestung, also known as patch testing, is a diagnostic method used in dermatology to identify allergens that cause allergic contact dermatitis. This condition is a delayed hypersensitivity reaction that occurs when the skin comes into contact with a substance to which an individual is sensitized. The test involves applying small amounts of suspected allergens to the skin, typically on the back, under occlusion. These allergens are usually in the form of a paste or on patches.

The patches are left in place for 48 hours, during which time the individual should avoid showering or activities that may cause excessive sweating. After 48 hours, the patches are removed, and the skin is examined for any reactions, such as redness, swelling, or blistering. A second reading of the test is often performed 72 to 96 hours after the initial application to assess any delayed reactions.

The results are interpreted by a trained healthcare professional who will assess the presence, type, and severity of any reactions. A positive reaction indicates a potential allergy to the tested substance. Epikutantestung is a valuable tool for diagnosing the cause of contact dermatitis, allowing for avoidance of the offending allergen and thus managing the condition effectively. Common allergens tested include metals, fragrances, preservatives, and rubber additives.