Search results
A patch test is a diagnostic method used to determine which specific substances cause allergic inflammation of a patient's skin. Patch testing helps identify which substances may be causing a delayed-type allergic reaction in a patient and may identify allergens not identified by blood testing or skin prick testing.
The patch test in the finite element method is a simple indicator of the quality of a finite element, developed by Bruce Irons. The patch test uses a partial differential equation on a domain consisting from several elements set up so that the exact solution is known and can be reproduced, in principle, with zero error.
What are patch tests? Patch testing is undertaken for the investigation and confirmation of substances that produce allergic contact dermatitis. It involves applying appropriately diluted allergens to the skin, usually on the back for convenience, for 48 hours.
Language links are at the top of the page across from the title.
Patch test, controlled application of biological or chemical substances to the skin in order to detect if the subject has an allergic hypersensitivity to one of them. The test was originally developed to test new chemical compounds for their allergic potential on animals but has since become widely.
- The Editors of Encyclopaedia Britannica
Dec 11, 2019 · Simplicity, safety, and low cost of patch testing methodology are highly recommended. Patch testing must have a good positive predictive value, defined as the percentage of true cases in those with a positive test, when this test is used in a given population.
Patch tests are used to identify the cause of allergic contact dermatitis. Standard or baseline series of allergens are recommended for people undergoing patch testing because these include the most common and important allergens that cause dermatitis, and will identify over 70% of culprit allergens.
