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Related Experiment Videos

Local radiant heating increases subcutaneous oxygen tension

T Ikeda1, F Tayefeh, D I Sessler

  • 1Department of Anesthesia and Perioperative Care, University of California, San Francisco, 94143-0648, USA.

American Journal of Surgery
|January 28, 1998
PubMed
Summary

Radiant heating at 38°C increases subcutaneous oxygen tension, potentially improving infection resistance. However, prolonged use of this novel bandage did not enhance collagen deposition in experimental wounds.

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Area of Science:

  • Biomedical Engineering
  • Wound Healing Research
  • Therapeutic Devices

Background:

  • A novel bandage incorporating a thermostatically controlled radiant heater was evaluated.
  • Subcutaneous oxygen tension was used as a key indicator for infection resistance and wound strength.
  • The study investigated the effect of radiant heating on collagen deposition in experimental wounds.

Purpose of the Study:

  • To determine the optimal temperature for the radiant heater bandage based on subcutaneous oxygen tension.
  • To test the hypothesis that prolonged radiant heating enhances collagen deposition in thigh wounds.

Main Methods:

  • Volunteers were fitted with experimental bandages heated to 38°C, 42°C, or 46°C.
  • Subcutaneous oxygen tension was measured using a tonometer.

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  • Collagen deposition was assessed by assaying hydroxyproline levels in removed polytetrafluoroethylene tubes after one week of treatment.

    • Main Results:

    • Skin temperature under the bandage ranged from 36°C to 37.5°C.
    • Subcutaneous oxygen tension increased by approximately 50% during heating, with no significant difference between tested temperatures.
    • Collagen deposition showed no significant difference between wounds treated with the radiant heating bandage and standard gauze bandages (3.4 ± 1.0 vs. 3.2 ± 1.1 μg/cm).

    Conclusions:

    • Radiant heating at 38°C effectively increases subcutaneous oxygen tension, suggesting potential benefits for infection resistance.
    • Prolonged application of the radiant heating bandage at 38°C did not lead to increased collagen deposition in experimental wounds.