关键词: 电磁辐射, 植入式医疗器件, 比吸收率, 安全性

Abstract: Long-term or excessive exposure of the human body to electromagnetic radiation may cause some health effect. When medical devices are implanted into human body, the level of electromagnetic radiation exposed to human body will be increased. With the widespread application of implantable medical devices, the safety of electromagnetic radiation containing such devices cannot be ignored. Implantable medical devices often communicate with the outside world or have power supply wirelessly. On the one hand, its existence will change the electromagnetic field distribution of external radiation sources in hu-man tissues, which may increase the level of electromagnetic radiation; on the other hand, it is a radiation source itself and will generate electromagnetic radiation in human tissues. Many countries and international organizations use the specific absorption rate to measure the impact of electromagnetic radiation on the human body, and use it to formulate safety limits for electromag-netic radiation. This paper reviews domestic and foreign research on electromagnetic radiation safety in the communication and charging scenarios of implantable medical devices, and focuses on the electromagnetic field metrology methods, related models and influencing factors of electromagnetic radiation specific absorption rate research. Finally, the numerical calculation and ex-perimental measurement methods are discussed and compared, and the important factors affecting the specific absorption rate are analyzed, which will provide reference to the engineering design of parameters such as optimal operating frequency and power limit.

Key words: electromagnetic radiation, implantable medical devices, specific absorption rate, safety