AN EXPERIMENTAL STUDY OF DIATHERMY : I. THE MEASUREMENT OF LUNG TEMPERATURE
1Hospital of The Rockfeller Institute for Medical Research.
The Journal of Experimental Medicine
|October 30, 2009
Summary
High-frequency currents can elevate rectal temperature in animals. Diathermy currents reverse the normal lung-to-rectal temperature difference, indicating deep tissue heating effects.
Area of Science:
- Physiology
- Biomedical Engineering
Background:
- Understanding deep tissue temperature changes is crucial for therapeutic applications.
- Rectal temperature is a common indicator of core body temperature.
Purpose of the Study:
- To investigate the effects of high-frequency currents on deep body temperatures.
- To quantify temperature changes in various tissues during diathermy.
Main Methods:
- Utilized special thermocouples for precise deep temperature measurement.
- Recorded rectal, intra-abdominal, intra-thoracic, and lung temperatures in anesthetized dogs.
- Applied diathermy currents at therapeutic strengths.
Main Results:
- High-frequency currents elevated rectal temperature in normal animals.
- Intra-abdominal and intra-thoracic temperatures showed minimal increase above rectal temperature during life.
- Diathermy reversed the normal lung temperature deficit, with lung temperature exceeding rectal temperature.
- A rapid temperature rise was observed in deep tissues between electrodes immediately post-mortem.
Conclusions:
- High-frequency currents, particularly diathermy, can induce significant deep tissue heating.
- The study provides evidence for localized hyperthermia in tissues subjected to diathermy.
- Developed specialized thermocouples for accurate deep body temperature monitoring.
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