Patch testing is a way of identifying whether a substance that comes in contact with the skin is causing a rash. At the Adult and Pediatric Dermatology we perform patch tests when an allergy is suspected or in cases when rash doesn’t improve or recurs with therapy.
We perform comprehensive testing using standard allergens present in North America. Consultation to determine the likely allergen involved is required before patch testing. Patch tests are placed usually on the back and reading is performed at 48 and 72 to 96 hours later. Our comprehensive panel of allergens includes the following: Benzocaine, Mercaptobenzothiazole (MBT), Colophony4-Phenylenediamine base, Imidazolidinyl urea Germall 115), Cinnamic aldehyde (Cinnamyl), Amerchol,
Carba mix, Neomycin sulfate, Thiuram mix, Disperse Red 17, Ethylenediamine dihydrochloride, Epoxy resin, Quaternium 15 (Dowicil 200), 4-tert-Butylphenolformaldehyde resin, Mercapto mix, Black rubber mix, Potassium dichromate Balsam Peru,
Nickelsulfate hexahydrate, Diazolidinylurea (Germall II,) di Alpha Tocopherol Acetate, Bacitracin, Mixed dialkyl thiourea, Disperse Orange 3, Paraben Mix Euxyl K 400, Fragrance mix, Glutaraldehyde2-Bromo-2-nitropropane-l3-diol (Bronopol), Sesquiterpene lactone mix, Thimerosal (Merthiolate), Dodecyl mercaptan4-Chloro-3,5-xylenol (PCMX), Ethyleneurea, melamine formaldehyde mix2-tert -Butyl-4-methoxyphenol (BHA), Goldsodiumthiosulfate, Ethyl acrylate, Glyceryl monothioglycolate (GMTG), Toluenesulfonamide formaldehyde resin, Methyl methacrylate, Cobalt(II) chloride hexahydrate, Tixocortol-21-pivalate, Budesonide Coconut diethanolamide, Triethanolamine, Cetyl stearyl alcohol (Lanette O), Tea Tree Oi,l Disperse Blue, Disperse Yellow, 34-Aminoazobenzene, Isoeugenol, Eugenol DMDM Hydantoin, Ylang-Ylang oil, Isopropyl myristate, Triclosan (Irgasan DP300) N,N-Diphenylguanidine, Polyoxyethylenesorbitanmonooleate(Tween 80), Dibutyl thiourea2-n-Octyl-4-isothiazolin-3-one, Disperse Blue, Compositae Mix, Lidocaine Copper sulfate, Mercuric chloride, Benzoylperoxide, Isoamyl-p-methoxycinnamate Lyral Octyl Salicylate, Benzalkonium chloride, Amidoamine Cocamidopropylbetaine Formaldehyde, Cl+Me-isothiazolinone (Kathon CG,100 ppm), Propylene glycol, Dimethyl dihydroxyethyleneurea (Fix.NF)