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Updated: Aug 12, 2026

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Esophageal Heat Transfer for Patient Temperature Control and Targeted Temperature Management
Published on: November 21, 2017
A thermal entrainment device for cardiovascular investigation
Journal of Medical Engineering & Technology
|July 1, 1980
Summary
This study shows that the body's temperature control mechanism can be entrained by alternating heated and cooled air. Best results for this thermoregulation entrainment were observed at a 30-second period.
Area of Science:
- Physiology
- Biomedical Engineering
- Thermoregulation
Background:
- The human body's temperature control mechanism is complex and influenced by various physiological parameters.
- Understanding thermoregulation is crucial for various medical and performance applications.
Purpose of the Study:
- To investigate the phenomenon of entrainment of the human body's temperature control mechanism.
- To determine the optimal conditions for achieving this entrainment using controlled airflow.
Main Methods:
- Subjects were exposed to alternately heated and cooled air over a limb.
- Physiological data, including electrocardiogram and optical plethysmography of the little finger, were collected.
- Fast Fourier Transform analysis was used to analyze the collected data.
Main Results:
- Entrainment of the temperature control mechanism was observed.
- Entrainment occurred with period times ranging from 8s to 80s.
- The most effective entrainment was achieved at a period time of 30s.
Conclusions:
- The body's temperature control system can be influenced and entrained by external thermal stimuli.
- Specific periodic thermal stimulation, particularly around 30s, can effectively entrain thermoregulation.
- Further research is ongoing to explore the implications and applications of this finding.

