Study type: Medical/biological study (experimental study)

Sustained 35 GHz radiofrequency irradiation induces circulatory failure. med./bio.

Published in: Shock 1995; 4 (4): 289-293

Aim of study (acc. to author)

To determine the thermal distribution and concomitant cardiovascular changes produced by whole-body exposure of rats to radiofrequency radiation of millimeter wave length.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 35 GHz
Modulation type: CW
Exposure duration: irradiation until death (32-69min, 49 ± 0.8 min)

Exposure 1

Main characteristics
Frequency 35 GHz
Type
Charakteristic
Exposure duration irradiation until death (32-69min, 49 ± 0.8 min)
Modulation
Modulation type CW
Exposure setup
Exposure source
Distance between exposed object and exposure source 1.1 m
Chamber Anechoic chamber maintained at 27°C and 20% humidity.
Setup Animal was placed on a holder consisting of seven 0.5cm Plexiglas rods mounted in a semicircular pattern on 4x6cm Plexiglas plates 0.5cm thick.
Additional info Animals were exposed in E-orientation (electric field was parallel to long axis of body and the magnetic field perpendicular)
Parameters
Measurand Value Type Method Mass Remarks
power density 750 W/m² unspecified measured - -
SAR 13 mW/g unspecified calculated whole body determined by calorimetry.

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Investigated organ system:

Main outcome of study (acc. to author)

Exposure to 35-GHz radiation resulted in large and rapid increases in skin temperature and only moderate increases in colonic temperature. Heart rate increased throughout irradiation. Mean arterial pressure (MAP) as well maintained until skin temperature reached 42°C, at which point MAP declined until death. Death occured at colonic temperature 40.3°C and skin temperature 48°C. These data indicate that circulatory failure and subsequent death may occur when skin temperature is rapidly elevated, even in the presence of relatively normal colonic temperature.

Study character:

Study funded by

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