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patch test |
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patch testControlled 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. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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