To determine the thermal distribution and concomitant cardiovascular changes produced by whole-body exposure of rats to radiofrequency radiation of millimeter wave length.
| Exposure | Parameters |
|---|---|
|
Exposure 1:
35 GHz
Modulation type:
CW
Exposure duration:
irradiation until death (32-69min, 49 ± 0.8 min)
|
|
| Frequency | 35 GHz |
|---|---|
| Type | |
| Charakteristic | |
| Exposure duration | irradiation until death (32-69min, 49 ± 0.8 min) |
| Modulation type | CW |
|---|
| 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) |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| power density | 750 W/m² | unspecified | measured | - | - |
| SAR | 13 mW/g | unspecified | calculated | whole body | determined by calorimetry. |
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.
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