Definition

Noun: A diagnostic procedure used in medicine to identify specific allergic sensitivities. It involves applying small amounts of potential allergens, typically on small pads or chambers, to the skin (usually on the back) for a set period (e.g., 48 hours) to observe if a localized reaction develops.

Usage

A "patch test" is a specific medical test. It is used to diagnose allergic contact dermatitis. The term is typically used in medical contexts by healthcare professionals (dermatologists, allergists) and patients discussing diagnostic procedures.

Examples

• The dermatologist recommended a patch test to see if I was allergic to the nickel in my jewelry.
• Before using the new skincare product extensively, it's wise to do a patch test on a small area of your arm.
• The patch test results showed a strong positive reaction to fragrance mix.

Advanced Usage

• "to patch-test" (verb, less common): The act of performing a patch test.
  • The doctor will patch-test you for common environmental allergens.
• "patch testing" (gerund/noun): The process or field of conducting patch tests.
  • She specializes in patch testing for occupational skin diseases.

Variants and Related Words

• Patch testing (n): The process or methodology of applying and reading patch tests.
• Allergy test (n): A broader category of diagnostic tests that includes patch tests, skin prick tests, and blood tests.
• Contact dermatitis (n): The skin condition often diagnosed via a patch test.

Synonyms

• Allergen skin test: A more general term.
• Epicutaneous test: A technical/medical synonym.

Related Phrases

• "Read a patch test": To examine and interpret the results of a patch test.
  • The nurse will read the patch test after 48 and 72 hours to check for reactions.
• "Positive/Negative patch test": Describing the result.
  • A positive patch test indicates sensitivity to that substance.

Noun

1. a test to determine allergic sensitivity by applying small pads soaked with allergen to the unbroken skin