Autologous Serum Skin Test (ASST)

The Autologous Serum Skin Test (ASST) is a simple and painless test that can be used to diagnose autoimmune urticaria. Autoimmune urticaria is a type of chronic urticaria (hives) that is caused by the body's own immune system attacking itself.

The ASST is performed by injecting a small amount of the patient's own blood into the skin. If the patient has autoimmune urticaria, the injection will cause a wheal (red, raised area) to form at the injection site. The size of the wheal is used to determine whether the patient has autoimmune urticaria.

The ASST is a safe and effective test for diagnosing autoimmune urticaria. It is also a relatively quick and easy test to perform. The results of the ASST are usually available within 30 minutes.

Benefits

• The ASST is a safe and effective test for diagnosing autoimmune urticaria.
• The ASST is a relatively quick and easy test to perform.
• The results of the ASST are typically available within 30 minutes.

Risks

• There are no significant risks associated with the ASST.

How to Prepare for the Test?

• You do not need to fast before the ASST.
• You should avoid taking antihistamines for 2–3 days before the test.

How the Test is Performed?

• A healthcare professional performs the ASST.
• A small amount of blood will be drawn from your arm.
• The blood will be injected into the skin of your forearm.
• The injection site will be observed for a reaction.

Expected Results

• If you have autoimmune urticaria, the injection site will develop a wheal.
• The size of the wheal will be used to determine whether you have autoimmune urticaria.

Interpretation of Results

• A wheal that is 3 mm or more in diameter is considered a positive result for autoimmune urticaria.
• A wheal that is less than 3 mm in diameter is considered a negative result for autoimmune urticaria.

Follow-Up

• If the results of the ASST are positive, you will need to see a doctor to discuss treatment options.

Note: We at healthcare nt sickcare do not perform ASST or Autologous Serum Skin Test.