To examine the influence of acute (6 h) exposure to 2450 MHz (continuous wave) microwave irradiation on certain cardiovascular, biochemical, and hematologic indices in rats.
| Exposure | Parameters |
|---|---|
|
Exposure 1:
2.45 GHz
Modulation type:
CW
Exposure duration:
6 h
|
|
| Frequency | 2.45 GHz |
|---|---|
| Type | |
| Exposure duration | 6 h |
| Modulation type | CW |
|---|
| Exposure source | |
|---|---|
| Distance between exposed object and exposure source | 0.45 m |
| Chamber | small metal chamber 61cm x 61cm x 122 cm lined with microwave absorber (-35dB at 2,45GHz) |
| Setup | 17 cm x 5 cm x 6 cm cage constructed of 1/2 x 3/8 inch grid acrylic with a styrofoam holder placed inside the chamer |
| Sham exposure | A sham exposure was conducted. |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| SAR | 3.7 mW/g | average over mass | - | whole body | - |
| power density | 10 mW/cm² | - | - | - | - |
In the sham-exposed and exposed animals, the preexposure mean arterial blood pressure, heart rate, and colonic temperature were approximately 120 +/- 5 mmHg, 450 +/- 10 beats/min, and 37.0 +/- 0.2°C, respectively. In the sham-exposed animals these values remained stable throughout the 6 h exposure period. In the exposed rats, no effects were observed on mean arterial blood pressure or colonic temperature; however after 1 h of irradiation, a significant decrease in heart rate was noted (450 versus 400 beats/min). This reduction in heart rate persisted throughout the remainder of the exposure period. None of the hematologic or biochemical parameters investigated were affected by the microwave irradiation. Although other mechanisms may be responsible, this reduction in heart rate may have been due to cardiovascular adjustments because of microwave-induced heating with a resultant decrease in resting metabolic rate.
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