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(Database last updated on Mar 27, 2024)
| ID Number | 930 | |
| Study Type | In Vivo | |
| Model | 225, 1290 MHz (CW) exposure to monkeys and analysis of thermoregulatory responses. | |
| Details | Rhesus-monkeys (n=5) were exposed to 225 MHz (CW) RF (resonant frequency) at 0.4 to 2.9 W/kg (whole body average) for either 120 minutes or in multiple 10 minute periods at progressively higher levels to determine the threshold of the thermoregulatory response. Exposure resulted in significant thermoregulatory metabolic and physiological changes to adjust for temperature at exposure levels above 1.4 W/kg, and the monkeys were unable to tolerate exposures above 5 W/kg for 90 minutes (core temperature exceded 41.5°C). Cortisol increases were observed above an SAR of 3.5 W/kg. This was also reported in an earlier study exposing monkeys using a military AN/TPS-10 radar signal (1.3 GHz, 3 usecond pulse width, 337 pulses per second) for 8 hours at SARs of 0, 2, 3, and 4 W/kg. The increased cortisol effect was reported in an early study to also be dependent upon circadian rhythm. In contrast, exposure at 1290 MHz at SARs between 2.9-5.4 W/kg resulted in higher core temperature increases (0.4-1.3°C), possibly due to more focused and restricted heating at the surface. Temperature and cortisone relationships were also studied in rats with similar findings |
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| Findings | Effects (only at thermal levels) | |
| Status | Completed With Publication | |
| Principal Investigator | NIOSH, USA - wlotz@cdc.gov | |
| Funding Agency | NIOSH, USA | |
| Country | UNITED STATES | |
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