The types of tests to check for allergies in the body
The types of tests to check for allergies in the body. Allergy is a condition where a person becomes particularly vulnerable to substance / compound are not necessarily causing disturbance to others. Can be caused by hereditary factors. Allergic reactions can occur after several times exposure to allergens.
Types of allergy testing
Skin prick test; This test is to check for allergies to inhaled allergens and food allergens. Inhaled allergens are dust, dust mites, flakes of human skin, flakes of chicken skin, flakes of dog skin, flakes of cat skin, flakes of horses skin, grass pollen, rice pollen, corn pollen, mold spores, cockroaches etc..
While the food allergen are prawns, crabs, milkfish, snapper, egg yolks, egg whites, cocoa, cashew nuts, peanuts, soybeans, tomatoes, carrots, scallops, pineapple, coffee, milk, tea, domestic chicken, tuna, squid, wheat etc..
This test is performed on the forearm skin of the inside, and then the allergens that tested injected on the skin using a special needle (needle 2 mm), so it does not cause injury (no bleed in the skin). The result can be immediately known within 30 minutes, if positive allergy to certain allergens may arise itchy red bumps.
Terms of test is the patient must be healthy and free of drugs containing antihistamines (anti-allergy) for 3-7 days, depending on the type of drug and the recommended age of 4-50 years.
Patch test; This test is to determine contact allergies to chemicals, in dermatitis or eczema. This test is performed in the skin of the back. The results of these tests can only be read after 48 hours. When positive allergy to certain chemicals, there will be spots redness and curl up on the skin.
Requirement of this test is within 48 hours of the patient should not be an activity that sweating, bathing, slumped sleeping position, your back should not be rubbing. 2 days before the test, should not be taking drugs that contain anti-inflammatory. Your back area should be free of cream or ointment.
RAST (Radio Allergo Sorbent Test) IgE spesifik; This test to determine allergies to inhaled allergens and food allergens. This test requires a blood serum sample as much as 2 cc. Then the blood serum is processed by a special computerized machine, the results can be seen after 4 hours. Excess test is can do at any age and is not affected by drugs.
Skin test; This test is used to determine an allergy to the drug is injected. Performed in the forearm skin by injecting the drug to be tested in the lower layers of skin. New test results can be read after 15 minutes. If positive allergy there will be a bumps red and itchy.
Provocation tests; This test is used to determine allergies to drugs taken, food, able also to inhaled allergens. Provocation test for inhaled allergens called bronchial provocation tests. This test is used for asthma and allergic runny nose. Bronchial provocation tests and the food is rarely used, because it is not convenient for patients and high risk of asthma attacks and shock. Bronchial provocation test and meal provocation test was replaced by Skin Prick Test and Specific IgE metodeRAST.
For drugs provocation tests, using the DBPC (Double Blind Placebo Control) or double-blind trials. How patients taking medications with dosage increased gradually, and awaited his reaction with intervals of 15-30 minutes. In one day only allowed one drug being tested, in order to test the materials / substances have to wait another 48 hours later. The goal is to determine the allergic reaction slow type.