| Institution: | 1. Department of Neurosurgery, Ajou University School of Medicine, Suwon, Republic of Korea
Neuroscience Graduate Program, Department of Biomedical Sciences, Graduate School of Ajou University, Suwon, Republic of Korea;2. Radio Technology Research Department, Electronics and Telecommunications Research Institute, Daejeon, Republic of Korea;3. Department of Radio Sciences and Engineering, College of Engineering, Chungnam National University, Daejeon, Republic of Korea;4. School of Electrical and Computer Engineering, Chungbuk National University, Cheongju, Republic of Korea;5. Department of Neurosurgery, Ajou University School of Medicine, Suwon, Republic of Korea |
| Abstract: | Exposure to a radiofrequency (RF) signal at a specific absorption rate (SAR) of 4 W/kg can increase the body temperature by more than 1 °C. In this study, we investigated the effect of anesthesia on the body temperature of rats after exposure to an RF electromagnetic field at 4 W/kg SAR. We also evaluated the influence of body mass on rats’ body temperature. Rats weighing 225 and 339 g were divided into sham- and RF-exposure groups. Each of the resulting four groups was subdivided into anesthetized and non-anesthetized groups. The free-moving rats in the four RF-exposure groups were subjected to a 915 MHz RF identification signal at 4 W/kg whole-body SAR for 8 h. The rectal temperature was measured at 1-h intervals during RF exposure using a small-animal temperature probe. The body temperatures of non-anesthetized, mobile 225 and 339 g rats were not significantly affected by exposure to an RF signal. However, the body temperatures of anesthetized 225 and 339 g rats increased by 1.9 °C and 3.3 °C from baseline at 5 and 6 h of RF exposure, respectively. Three of the five 339 g anesthetized and exposed rats died after 6 h of RF exposure. Thus, anesthesia and body mass influenced RF exposure-induced changes in the body temperature of rats. Bioelectromagnetics. 2020;41:104–112. © 2019 Bioelectromagnetics Society. |
