A screening test in which a small piece of material containing the allergy-causing substance is placed on the skin; redness or edema indicates a positive reaction.
A skin test in which small pieces of filter paper or linen soaked in a solution or covered with ointment are applied directly to the skin.
A test for allergies or tuberculosis, where a piece of sticking plaster containing an allergic substance or tuberculin is stuck to the skin to see if there is a reaction.
A kind of medical test used in indentifying which substances might be causing allergic reactions.
Skin test for identifying an allergen. A paper or cloth patch containing suspected allergens (e.g., pollen, animal hair) is applied to the skin; the appearance of red, swollen skin or any rash when the patch is removed usually indicates allergy to a particular substance or substances.
A skin test for sensitivity to a particular substance. A small amount of solution containing the substance in question is placed on the patient’s arm and covered, and the skin is observed for a reaction a few days later.
A test used to detect hypersensitivity to a substance that comes in contact with the skin. The patch test consists of applying a substance suspected to be the cause of a contact dermatitis to an unaffected area of skin. The substances causing the allergies are identified if the skin reacts to them. A detailed medical history allows the dermatologist to select the most likely or the most common allergens. The patch test consists of applying a substance suspected to b e the cause of a contact dermatitis to intact uninflamed skin. Test substances are applied to the upper back and removed after 48 hours. The substances causing the allergies are identified when the skin reacts to them.
A test to discover which, if any, of a number of possible substances is responsible for a patient’s allergy. Small quantities of different allergens are applied either to light scratches on the skin of the arm or back or beneath plaster. In common allergies the offending substance causes a patch of swelling and a typical red flare in the skin in 5 to 15 minutes. A delayed reaction may take 24 to 72 hours to develop.
This is used to identify possible substances that may be causing a patient’s allergy. Small amounts of different substances are placed on the skin usually of the back or arm. If the patient is allergic then a red flare and swelling will appear, usually within about 15 minutes. Sometimes the reaction may take longer up to three days to develop.
A skin test in which a low concentration of a presumed allergen is applied to the skin beneath an occlusive dressing. The test is the primary method used to determine the presence of allergic contact dermatitis. If the concentration of the agent is too high or an allergy exists to the material used in the dressing, false-positive reactions can occur as a result of local irritation. False negative reactions may result if the concentration of the suspected allergen is too low, or if the duration of the test is too short. Commercially available, standardized kits to facilitate patch testing include the T.R.U.E. test and Finn Chambers.
Test required by the Federal Food, Drug, and Cosmetic Act for identifying a possible allergy in a client.
An allergen identification procedure, known as a skin test, is conducted to determine specific triggers of allergies. During this test, a suspected substance is applied to the skin, and after a period of 24 to 48 hours, any redness and swelling in the area indicate a positive reaction to that particular substance. In the absence of a reaction, another substance is applied, and this process is repeated until an allergic response is observed at the site of contact.
A technique employed to identify the substances accountable for the skin ailment known as allergic contact dermatitis. Various potential allergens are applied onto a patch and affixed to the skin. The occurrence of a skin reaction signifies sensitivity to a specific allergen.