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The thin layer rapid use epicutaneous test (TRUE-test), a new patch test method with high accuracy.

T I Fischer, H I Maibach

    The British Journal of Dermatology
    |January 1, 1985
    PubMed
    Summary
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    The new Thin Layer Rapid Use Epicutaneous Test (TRUE-test) patch offers improved allergen stability and bioavailability. This innovative method ensures exact dosage and even distribution, overcoming limitations of traditional petrolatum-based tests.

    Area of Science:

    • Dermatology and Allergy Testing

    Background:

    • Traditional patch tests often use petrolatum vehicles, leading to issues with allergen bioavailability, dosage accuracy, and even distribution.
    • These limitations can impact the reliability and effectiveness of standard epicutaneous allergy testing.

    Purpose of the Study:

    • To introduce and describe the Thin Layer Rapid Use Epicutaneous Test (TRUE-test) as a novel patch testing system.
    • To highlight the advantages of the TRUE-test vehicle over traditional petrolatum-based methods.

    Main Methods:

    • The TRUE-test utilizes a thin, flexible, solid vehicle on a waterproof backing to incorporate allergens.
    • Allergens are stabilized within the vehicle through crystallization, micronization, or emulsification into a gel.

    Main Results:

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  • The TRUE-test vehicle demonstrates good stability for various allergen forms.
  • This system ensures precise allergen dosage, uniform surface spread, and enhanced bioavailability.
  • It effectively addresses the common problems associated with petrolatum vehicles.

    • Conclusions:

    • The TRUE-test represents a significant advancement in patch testing technology.
    • Its design offers superior allergen delivery and stability, potentially improving diagnostic accuracy in epicutaneous testing.