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Related Experiment Videos

The importance of a dedicated patch test clinic.

P Ormond1, E Hazelwood, B Bourke

  • 1Department of Dermatology, South Infirmary-Victoria Hospital, Old Blackrock Road, Cork, Ireland.

The British Journal of Dermatology
|March 21, 2002
PubMed
Summary

A new specialist patch test clinic significantly increased the detection of allergic contact dermatitis. Expanded allergen testing and patient product analysis were key factors in identifying more cases.

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Area of Science:

  • Dermatology
  • Allergology
  • Clinical Immunology

Background:

  • A specialist patch test clinic was established in April 1997.
  • The clinic expanded its allergen battery from six to 21 and introduced patient-specific product testing.
  • Prick testing for latex hypersensitivity was also incorporated.

Purpose of the Study:

  • To evaluate the effect of the new specialist clinic on diagnosing allergic contact dermatitis.
  • To compare diagnostic yields before and after the clinic's implementation.

Main Methods:

  • A retrospective comparison of patch test results from 1996 (pre-clinic) and 1998 (post-clinic).
  • Analysis included the number of patients tested, positive patch test results, identified allergens, and reactions to personal products.

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  • Latex hypersensitivity was assessed using prick testing.

    • Main Results:

    • The number of patients with positive patch tests increased significantly from 31/91 in 1996 to 84/158 in 1998 (P = 0.0036).
    • The number of identified allergens rose from 18 to 53, and positive reactions to personal products increased from 2 to 12 (P = 0.04).
    • Three cases of latex hypersensitivity were detected in 1998.

    Conclusions:

    • Establishing a specialist patch test clinic led to a higher detection rate of allergic contact dermatitis.
    • The expanded range of allergen testing and routine analysis of patients' own products were crucial for improved diagnosis.