Intradermal Test

Intradermal test: what is it and how is it carried out?

An intradermal test is one of the methods for diagnosing allergic reactions, in which the allergen is injected into the skin. This method is the most accurate and is often used in clinical practice to determine an allergic reaction to a specific allergen.

How is an intradermal test performed?

An intradermal test is carried out using a small amount of allergen, which is injected under the skin. This is usually done on the forearm or back. This involves using a special instrument that makes a small incision in the skin and then injects a small amount of the allergen. After this, a bandage or patch is applied to the site of the allergen injection.

20 minutes after the allergen is administered, the doctor evaluates the skin's reaction to the allergen. If your skin develops spots, redness, or swelling, this may indicate an allergic reaction to the allergen.

What allergens can be determined using an intradermal test?

Using an intradermal test, you can determine allergic reactions to various substances, such as plant pollen, house dust, animal hair, food and many others. The doctor selects allergens to test depending on the patient's symptoms and the suspected causes of allergic reactions.

What are the advantages of intradermal testing?

Intradermal testing is the most accurate method for diagnosing allergic reactions. It allows you to accurately determine the allergen that causes an allergic reaction, which allows the doctor to select the most effective treatment and recommendations for the prevention of allergic reactions.

However, before performing an intradermal test, it is necessary to consult a doctor and clarify possible contraindications and restrictions.

So, intradermal testing is an important method for determining allergic reactions, which allows you to accurately determine the allergen that causes the reaction and choose the most effective treatment and prevention of allergic reactions. But, as with any medical procedure, you should consult your doctor before performing an intradermal test.

Intradermal test (lat. provocatio cutis intradermalis) is a laboratory method of allergic diagnosis proposed by the American allergist Charles Runyon in 1906. The intradermal test was called the “keyhole patch test” or “key hole patch” (from the English “view through the keyhole”), due to the fact that the control leaves a small mark measuring 2.5 by 7.5 mm on the patient’s skin from a needle used to apply and withdraw material as an intradermal injection. To enhance the immune response or additional diagnostics, the doctor may use emollients (cosmetic products) as side substances that support the moisture-holding capacity of the skin. Today this technique is used everywhere due to its high efficiency and safety. It can be performed on children even up to one year old.

Symptoms

Usually the patient does not require painkillers, since the injection is completely painless, since the needle has a very small diameter. The test can be completed in a couple of minutes, even for older people.