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.

中文翻译：

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麻醉和未麻醉的大鼠暴露于射频电磁场对体温的影响。

以4 W / kg的特定吸收率（SAR）暴露于射频（RF）信号会使体温升高超过1°C。在这项研究中，我们调查了麻醉在4 W / kg SAR的RF电磁场下对大鼠体温的影响。我们还评估了体重对大鼠体温的影响。将重为225 g和339 g的大鼠分为假暴露和RF暴露组。所得的四组中的每组又分为麻醉组和非麻醉组。将四个射频暴露组中的自由运动大鼠以4 W / kg全身SAR的频率接受915 MHz射频识别信号，持续8 h。使用小动物温度探针在RF暴露期间每隔1小时测量一次直肠温度。未麻醉的体温，225和339 g的可移动大鼠不受RF信号的显着影响。但是，在射频暴露5小时和6小时后，麻醉的225 g和339 g大鼠的体温分别比基线升高了1.9°C和3.3°C。5只339 g麻醉和暴露的大鼠中有3只在RF暴露6小时后死亡。因此，麻醉和体重影响了RF暴露诱导的大鼠体温的变化。生物电磁学。2020; 41：104-112。©2019生物电磁学会。麻醉和体重影响了RF暴露引起的大鼠体温变化。生物电磁学。2020; 41：104-112。©2019生物电磁学会。麻醉和体重影响了RF暴露引起的大鼠体温变化。生物电磁学。2020; 41：104-112。©2019生物电磁学会。