Study type: Medical/biological study (experimental study)

Radio frequency (13.56 MHz) energy enhances recovery from mild hypothermia med./bio.

Published in: J Appl Physiol 1989; 67 (3): 1208-1212

Aim of study (acc. to author)

To compare the effectiveness of radiofrequency energy against hot (41°C) water immersion and an insulated cocoon for rewarming hypothermic men.



Exposure Parameters
Exposure 1: 13.56 MHz
Exposure duration: 60 min
  • SAR: 2.5 mW/g

Exposure 1

Main characteristics
Frequency 13.56 MHz
Exposure duration 60 min
Exposure setup
Exposure source
Distance between exposed object and exposure source 0.044 m
Setup Subjects wore a vest with the induction coils threaded through the foam panels to form a helical coil
Measurand Value Type Method Mass Remarks
SAR 2.5 mW/g - - - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • before exposure
  • during exposure

Main outcome of study (acc. to author)

The average delta esophageal temperature for radiofrequency (1.15 +/- 0.22°C/h) was faster than either insulated cocoon (0.37 +/- 0.16°C/h) or water immersion (0.18 +/- 0.09°C/h) (rectal temperature did not follow esophageal temperature during the early stages of rewarming). The data show the superiority of radiofrequency energy for rewarming mildly hypothermic men.

Study character:

Study funded by

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