patch test

patch test
Med. a test for suspected allergy by application to the skin of a patch impregnated with an allergen: allergic reaction is indicated by redness at the site of application.
[1930-35]

* * *

Controlled application of biological or chemical substances to the skin to test for allergy.

Small amounts of diluted test substances applied under a patch of cloth or soft paper and an impermeable membrane are left in place for 48 hours, and the skin reaction is then examined and scored from 0 (none) to 4+ (severe blistering and redness).

* * *

      controlled application of biological or chemical substances to the skin in order to detect if the subject has an allergic hypersensitivity (allergy) 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 used to diagnose allergies in humans. Patch testing is usually done on the skin of the upper back or the outer arm. Small amounts of test substances diluted in a solvent such as water or petroleum jelly are applied to the skin under a patch of cloth or soft paper and an impermeable membrane. The patch is left in place for 48 hours, after which the skin reaction is examined and scored from 0 (no apparent reaction) to 4+, indicating severe blistering as well as angry redness of the exposed skin. Patch testing is an extremely accurate indicator of allergic sensitivity.

* * *


Universalium. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • patch test — n a test for determining allergic sensitivity that is made by applying to the unbroken skin small pads soaked with the allergen to be tested and that indicates sensitivity when irritation develops at the point of application compare INTRADERMAL… …   Medical dictionary

  • Patch test — may refer to*Patch test (finite elements) *Patch test (medicine) …   Wikipedia

  • patch test — patch′ test n. med a test for suspected allergy in which a patch impregnated with an allergen is applied to the skin • Etymology: 1930–35 …   From formal English to slang

  • patch test — n. Med. a test for determining allergy to a specific substance, made by attaching a sample of it, often a small piece of material saturated with the substance, to the skin and observing the reaction …   English World dictionary

  • Patch-Test — Der Patch Test in der Finite Elemente Methode ist ein einfacher Indikator für die Qualität eines finiten Elements. Er wurde von Bruce Irons entwickelt. Der Patch Test benutzt ein Gebiet aus mehreren Elementen, das so aufgebaut ist, dass die… …   Deutsch Wikipedia

  • Patch test — Lecture d un Prick test : différents allergènes ont été testés, certains sont fortement positifs, d autre moins. Le Patch test est une méthode utilisée en dermatologie pour déterminer si une substance spécifique est capable de provoquer une… …   Wikipédia en Français

  • Patch-Test (Begriffsklärung) — Patch Test bezeichnet bei der Finite Elemente Methode einen Indikator für die Qualität eines finiten Elementes, siehe Patch Test in der Medizin einen Allergietest, siehe Epikutantest Diese Seite ist eine …   Deutsch Wikipedia

  • Patch test (finite elements) — 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… …   Wikipedia

  • Patch test (medicine) — A patch test is a method used to determine if a specific substance causes inflammation of the skin. It is often used to test for allergens.Any individual with suspected allergic contact dermatitis and/or atopic dermatitis needs patch testing. The …   Wikipedia

  • patch test — a test to discover which allergen is responsible for contact dermatitis in a patient. Very low concentrations of common allergens (and any substances suspected of causing the dermatitis in the individual patient) are applied under a patch on the… …   The new mediacal dictionary

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”