patch test

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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.
References in periodicals archive ?
In stark contrast to the reported 35 cases across the entire country during a 10-year period, the investigators found 76 cases (1%) of the 1,056 patch tests.
She noted that delayed patch test readings are common to metals, topical antibiotics, and topical corticosteroids, and that positive reactions to gold are often not clinically relevant.
Patients on systemic corticosteroids, immunosuppressants, PUVA therapy for at least 2 weeks prior to patch test.
Methods This was an epidemiological study during which a total of 100 patients suspected and provisionally diagnosed as having contact dermatitis to metals were subjected to a patch test with Indian Standard Battery developed by CODFI (Contact and Occupational Dermatoses Forum of India).
These MPD values are also transformed into ETD so that they can be compared to measurements from the sand patch tests and other methods.
Warshaw EM, Buchholz HJ, Belsito DV, et al: Allergic patch test reactions associated with cosmetics: retrospective analysis of cross-sectional data from the North American Contact Dermatitis Group, 2001-2004.
The atopy patch tests were positive in 36 of 125 patients tested (28.
She recently set up a salon that uses natural hair colouring products and says: "I'm getting quite a high number of new clients who are saying that they've never been tested and these are women in their fifties who have never had a skin patch test.
But out of the 30 salons, 25 failed to suggest the customer have a patch test to see if they were allergic to the dye before having the treatment done.
This fact makes the standard patch test series a useful, effective, and economical screening tool for allergic contact hypersensitivity (6-8).
The exact solutions of the displacement fields for linear, quadratic and cubic patch tests are given in Equations 6, 7, and 8 as follows: