Patch test
Patch test
A Patch test (pronounced: /pætʃ tɛst/) is a method used in dermatology to identify whether a specific substance causes allergic inflammation of the skin.
Etymology
The term "patch test" comes from the English words "patch" and "test". The word "patch" is derived from the Old French pache, meaning "spot, stain", and "test" comes from the Old French test, meaning "small vessel".
Procedure
In a patch test, small amounts of potential allergens are applied to the skin on small patches, which are then left on for a period of time, typically 48 hours. The skin is then examined for any reaction. This test is often used to determine if a specific substance may be causing an allergic contact dermatitis reaction.
Related Terms
- Allergen: A substance that can cause an allergic reaction.
- Dermatitis: Inflammation of the skin.
- Contact dermatitis: A type of dermatitis that occurs when the skin comes into contact with a certain substance.
- Allergic contact dermatitis: A type of contact dermatitis that occurs when the skin comes into contact with a substance to which the individual is allergic.
See Also
External links
- Medical encyclopedia article on Patch test
- Wikipedia's article - Patch test
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