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patch test
(redirected from Patch tests)

    Also found in: Dictionary/thesaurus, Medical, Legal, Financial, Wikipedia 0.01 sec.

patch test

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).

patch test [′pach ‚test]
(immunology)
A test in which material is applied and left in contact with intact skin surfaces for 48 hours in order to demonstrate tissue sensitivity.
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