Types And Procedures Of Different Allergy Tests

There are different types of allergens, so there are several different types of allergy tests that can be used to identify the patient’s allergies.
Types and procedures of different allergy tests

In general, various allergy tests are medical tests that include a set of procedures that identify allergies or sensitivities that a patient has to certain substances.

These tests can be done differently. Some of the most common methods are a random sample or skin allergy test , blood tests and a controlled exposure to the problem substance. In addition, a medical team can also resort to patch tests.

Different allergy tests: lab test versus exposure tests

Blood tests, or a lab test, are different from the other techniques when it comes to identifying allergies. This is because they only control the substances that are present in the blood.

These tests usually involve IgE antibodies, or cells that participate in the protection of our body against substances that the body registers as “dangerous”.

On the other hand, there are also exposure tests. These include various allergy tests such as random sampling, patch tests and controlled exposure of the suspicious substance. This allows a medical team to check for any allergic reaction.

To identify the allergen, the medical team examines any symptoms the patient may show and compares them to previous allergic reactions. When exposed to a substance, they can administer it orally, nasally, through the bronchial tubes, etc. This depends on the properties of the substance itself.

Different allergy tests for medicines

Allergy test.

Usually, a medical team will perform this type of allergy test when the patient has had an allergic reaction for unknown reasons. After all, medications can produce different symptoms, depending on their properties.

According to recent studies, all medications can cause side effects in different people. However, there are certain substances that can lead to more frequent hypersensitivity.

Some common symptoms of an allergic reaction to medication include:

  • Rash
  • General stinging or burning, or a stinging or burning sensation in the area where the medicine was administered
  • Blisters
  • Fever that can vary in intensity
  • Burning and stinging in the eyes
  • Inflammation in the area where the medicine was applied
  • Anaphylaxis or an anaphylactic reaction in the more severe cases

During an allergy test, your doctor may check several types of medication. For each test, specialists will decide which medications to administer. In any case, the test will show allergy or sensitivity.

Random samples or skin tests

Variations of allergy tests.

Stinging or skin tests are another common form of various allergy tests. Doctors often use these to detect food, animal or environmental allergies.

Here is the most common procedure:

  1. First, the medical team disinfects the patient’s skin on the inner forearm with alcohol.
  2. The medical team then injects a small amount of the substance to be tested into the skin.
  3. Then the punctured areas are marked, and the areas of remaining substances are cleaned.
  4. Afterwards, the patient must wait for fifteen minutes to see if an allergic reaction occurs. During these fifteen minutes, the patient cannot scratch or touch the area where the drugs were injected.

Different allergy tests: patch tests

These tests are also common ways to determine if there are any food, environmental or animal allergies.

  1. In this test, the doctor or nurse first disinfects the patient’s back.
  2. Then place patches containing test substances on the back. The patches slowly release the contents over a 48-hour period.
  3. After 48 hours, the patient must return to the doctor to have the patches removed and observe any allergic reactions under each patch.

Some recommendations for those who have a patch test performed include not wetting or scratching the back where the patches are located. Avoid intense physical activity that can cause sweating because it can cause the patches to fall off. The patient should also avoid the use of surgical tape and taking other medications, if possible.

Controlled exposure tests

Doctors usually use this type of test to check a patient directly for allergies to a particular medication or the patient’s tolerance to similar drugs.

However, this method is more risky than the above tests. In these cases, medical specialists carefully consider the benefits and risks when evaluating this type of test.

Sometimes the medical team may repeat the procedure due to a misleading negative result. In these cases, the specialists will decide on the best test for each situation and communicate these options with the patient.

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