Immediate Allergy Skin Test

The immediate-onset allergic skin test is a test for allergens and a method for screening allergens. Rapid-type allergy, also known as type I response, is the most common type. The main feature is that the reaction occurs rapidly, and the clinical symptoms can occur from a few seconds to several hours after re-exposure to the sensitizer, generally occurring in 15 to 20 minutes. Basic Information Specialist classification: skin examination classification: immune examination Applicable gender: whether men and women apply fasting: fasting Analysis results: Below normal: Normal value: no Above normal: negative: The reaction was negative. Positive: Capillary vasodilation, increased vascular permeability, intravascular fluid exudation, smooth muscle contraction, hypersecretory gland hyperactivity, etc.; anaphylactic shock; bronchial asthma. Tips: Pay attention to a healthy diet and ban foods or medicines that have caused or may cause allergic reactions. Keep your skin clean. Normal value The reaction was negative. Clinical significance Abnormal results: telangiectasia, increased vascular permeability, intravascular fluid exudation, smooth muscle contraction, hypersecretory gland hyperactivity, etc.; anaphylactic shock; bronchial asthma. People in need of examination: Patients with allergies but unknown allergens. Positive results may be diseases: pediatric drug dermatitis, pediatric drug allergy, physical allergies, drug allergy, type III hypersensitivity disease precautions Forbidden before examination: Pay attention to a healthy diet and ban foods or medicines that have caused or may cause allergic reactions. Keep your skin clean. Requirements for inspection: antigen contamination, unclean syringes, can increase false positive reactions, so ensure that the antigen and syringe are clean. The patient should actively cooperate with the doctor. Inspection process Antigens that cause this type of reaction include pollen, dust, insect bites, food (eggs, milk, fish and shrimp), drugs (such as penicillin), biological products (vaccines, antitoxins), and the like. It can enter the body through ingestion, inhalation, injection, etc. In the course of collecting medical history or examination, if the patient finds that the patient has a strong allergic reaction to something, he should also remind the skin tester to pay attention to the skin test, and if necessary, switch to a higher dilution antigen for skin test. A patch test or a scratch test is performed before the intradermal test to ensure safety. Generally, after the whole group of antigen skin test is completed, an intradermal control test should be performed on the adjacent site with physiological saline or the antigen-extracting solvent to eliminate the possibility of non-specific stimulation causing a false positive reaction. Not suitable for the crowd Inappropriate people: patients with severe allergies and positive skin scratch marks. Adverse reactions and risks It is a safe check and is harmless to the body.

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