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Related Experiment Videos

Temperatures reached inside stand-up ultraviolet treatment boxes.

P Asawanonda1, B Ortel, C R Taylor

  • 1Department of Dermatology, Massachusetts General Hospital, Boston 02114, USA.

Photodermatology, Photoimmunology & Photomedicine
|November 30, 1999
PubMed
Summary

Ultraviolet (UV) light therapy units can overheat, potentially worsening eczema. This study found significant temperature increases in UV treatment devices, highlighting the need for effective ventilation to maintain patient comfort and safety.

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Area of Science:

  • Dermatology
  • Phototherapy
  • Biomedical Engineering

Background:

  • Ultraviolet (UV) light therapy is a common dermatological treatment.
  • Heat generated by UV treatment units can cause patient discomfort and potentially exacerbate skin conditions like eczema.
  • Understanding temperature fluctuations within these units is crucial for optimizing treatment protocols.

Purpose of the Study:

  • To quantify the temperature changes occurring within various UV treatment devices.
  • To assess the impact of ventilation systems on internal temperatures.
  • To measure actual skin temperature variations during phototherapy sessions.

Main Methods:

  • Air temperatures were measured in psoralen plus ultraviolet A (PUVA), narrowband ultraviolet B (UVB), broadband UVB, and combination UVA/UVB cabinets using a thermocouple thermometer.

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  • Temperature measurements were taken with and without ventilation in a combination UVA/UVB unit.
  • Skin temperatures were recorded on patients undergoing treatment.

    • Main Results:

    • Significant increases in air temperature were observed across all tested UV treatment units.
    • Psoralen plus ultraviolet A (PUVA) and narrowband ultraviolet B (UVB) units showed the most pronounced temperature rises.
    • Temperatures were highest when ventilation systems were deactivated, and skin temperatures also increased notably.

    Conclusions:

    • UV treatment units generate substantial heat, impacting patient comfort and potentially treatment efficacy.
    • Ventilation systems play a critical role in regulating internal temperatures within UV treatment devices.
    • Maintaining optimal temperatures through ventilation is essential for safe and comfortable phototherapy.