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Related Experiment Videos

Patch testing in Hong Kong.

T Y Lee1, T H Lam

  • 1Caritas Medical Centre, United Christian Hospital, Kowloon, Hong Kong.

Contact Dermatitis
|September 1, 1989
PubMed
Summary
This summary is machine-generated.

Patch testing is acceptable and useful for diagnosing allergic contact dermatitis (CD) in Hong Kong. The study found it changed diagnoses in over 20% of patients, identifying common allergens like fragrance mix and nickel sulfate.

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Area of Science:

  • Dermatology
  • Allergology
  • Clinical Immunology

Background:

  • Contact dermatitis (CD) is a common skin condition with various causes.
  • Accurate diagnosis is crucial for effective management and patient outcomes.
  • Patch testing is a standard diagnostic tool for allergic contact dermatitis.

Purpose of the Study:

  • To evaluate the acceptability and diagnostic value of patch testing in Hong Kong.
  • To identify common allergens causing contact dermatitis in the local population.
  • To assess the impact of patch testing on clinical diagnosis.

Main Methods:

  • A systematic selection of 112 patients with suspected dermatitis (CD, EE, UE) was performed.
  • Patch testing was offered to patients, with acceptability and reasons for refusal recorded.

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  • Results of patch testing, including positive reactions and identified allergens, were analyzed.

    • Main Results:

    • 81.3% of patients accepted patch testing, with inconvenience being the main reason for refusal.
    • Patch testing was successfully completed in 88 out of 91 tested patients.
    • Positive reactions were observed in 49 patients, with fragrance-mix and nickel sulfate being the most common sensitizers.
    • Patch testing changed the initial diagnosis in 21.3% of CD cases, 18.7% of EE cases, and 28.0% of UE cases.

    Conclusions:

    • Patch testing is an acceptable and valuable diagnostic tool for dermatitis in Hong Kong.
    • The test successfully identified allergic contact dermatitis and common allergens, aiding in diagnosis.
    • Patch testing significantly impacts clinical diagnosis, leading to more accurate identification of allergic triggers.