Contact Dermatitis Diagnosis: Patch Testing. There are no allergic antibodies involved in contact dermatitis, instead, various white blood cells entering into the skin cause the reaction. Before undergoing a patch test, a patient may be asked to refrain from taking certain medications, or from using a tanning bed, especially on their back. The back is usually the most accommodating area of skin to perform the patch test. Unlike allergy skin testing, patch testing does not involve the use of needles. The American Contact Dermatitis Society, Contact Dermatitis and Patch Testing Dermatitis is a Common and Significant Skin Disease Although dermatitis (ICD-9. Results of the patch test (T.R.U.E. During this time, the patient has to avoid getting the tape of the patch wet, so showers, baths and excessive sweating need to be avoided. After the 4. 8 hours are up, the patient returns to the clinician's office for removal. Before taking the patches off the patient's back. Patch testing simply involves the placement of paper tape on the back, and does not involve the use of needles. Children can safely be patch tested, and a child is old enough for patch testing once they are old enough to understand that they cannot remove the tape themselves. What Are the Possible Side Effects of Patch Testing? Since the goal of the patch testing is to determine allergic reaction, at least one patch will cause a small area of contact dermatitis. This means that the immune system . The original area of skin that reacted to a particular chemical could again get red and itchy after that same chemical was applied using patch testing, even though the patch test was placed on a different area of skin. For example, a person with contact dermatitis of the eyelids from cosmetics may notice that the rash on their eyelids gets worse after the chemical from the cosmetics is used in a patch test on their back. The memory response is a good sign that the culprit chemical has been identified. Once all of the readings of the patch test are completed, the patient may use a topical steroid. While it can make for an uncomfortable few days, it's important to wait until the final reading of the patch test has been completed before treating the patch areas with any creams. The topical steroid, or other prescribed anti- itch creams, also may be used on the area of the body that experiences a memory response, even if the patch test is still ongoing. Only the skin where the patch test was placed affects the results of the test. Find out more about.
TEST Manufacturer: Mekos Laboratories AS Indication: Indicated for use as an aid in the diagnosis of allergic contact dermatitis in persons 18 years of age and older whose history suggests sensitivity to one or more of the 35 substances.
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October 2016
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