> ## Content Index
> Fetch the complete content index at: https://www.fdaweb.com/llms.txt
> Use this file to discover other available public pages before exploring further.

# Patch Test for Allergic Contact Dermatitis Approved
- URL: https://www.fdaweb.com/patch-test-for-allergic-contact-dermatitis-approved/
- Published: 2017-09-12T12:00:00.000Z
- Updated: 2026-09-14T22:49:15.000Z
- Author: David McFarland
- Tags: Devices, #legacy-id-D5139612

FDA has approved a SmartPractice PMA for its TRUE Test ready-to-use patch test panels for pediatric patients as young as six years of age for diagnosing allergic contact dermatitis (ACD), a persistent skin rash caused by exposure to substances to which a patient is allergic. The most common allergens causing ACD in children are nickel, topical antibiotics, preservative chemicals, fragrances and rubber accelerators, according to the company. The only way to effectively diagnose ACD is to perform a patch test, it says. Patch testing involves applying panels containing individual test substances onto a patient’s skin. The panels are worn for 48 hours, after which they are removed and returned to the doctor’s office to have the results read and interpreted.