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Related Experiment Videos

Assessing foot temperature using infrared thermography.

Pi-Chang Sun1, Shyh-Hua Eric Jao, Cheng-Kung Cheng

  • 1Division of Physical Medicine and Rehabilitation, Taoyuan Veteran Hospital, Taoyuan, Taiwan.

Foot & Ankle International
|October 14, 2005
PubMed
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This study developed a standardized protocol for quantifying foot temperature using infrared imaging, recommending 15 minutes for clinical thermographic measurements of neuropathic feet. Normalized temperature readings showed better clinical diagnostic utility in diabetic patients.

Area of Science:

  • Medical imaging and diagnostics
  • Thermography in clinical practice
  • Diabetic foot complications

Background:

  • Previous recommendations for using skin temperature to monitor neuropathic feet were limited by imprecise measurements.
  • A need exists for a standardized protocol to accurately quantify foot temperature for diagnostic purposes.

Purpose of the Study:

  • To propose and validate a standardized protocol for quantifying foot temperature using infrared imaging.
  • To assess the clinical usefulness of normalized sole temperature in diagnosing diabetic neuropathy.

Main Methods:

  • Infrared thermography was employed to measure skin temperature in six sole subregions.
  • Experiment 1: Healthy volunteers (n=16) to determine temperature variations over time and identify stable measurement points.

Related Experiment Videos

  • Experiment 2: Diabetic patients (n=62) with and without sympathetic skin response (SSR) to evaluate normalized sole temperature against forehead temperature.

    • Main Results:

    • Plantar temperature varied by subregion and over time, stabilizing after 15 minutes.
    • The arch region showed the highest temperature (29.3°C), while toes were coolest (26.2°C).
    • Normalized temperature showed significant differences between diabetic patients with and without SSR, indicating potential diagnostic value.

    Conclusions:

    • Mean plantar temperature is a stable indicator of thermoregulation, stabilizing after a 15-minute equilibration period.
    • Normalized temperature measurements offer greater clinical utility than absolute plantar temperature, particularly for diabetic foot assessment.
    • The proposed protocol, including mean plantar temperature, optimal measurement time, and normalization, is crucial for managing neuropathic foot disorders.