Frequency restrictions for wireless power transfer of implantable medical devices

Wireless power transfer (WPT) system is turning to be a reliable strategy to power implantable devices. However, WPT possess strong reactive near-field to induce electric fields in the body tissue of implant wearer. In addition, implantable devices with WPT may be exposed to the unwanted strong electromagnetic field and be disturbed functionally. These may pose potential direct health hazards or serious damage to the function of health via interference with medical implants. In this paper, the safety guidelines from different responsible organization are reviewed and discussed in the context of human safety. Based on the discussion and literature review, the effect and affect of state-of-the-art of the existing guidelines are discussed. As an outcome, several needs to be added as the extension of safety guidelines for coverage of persons with implants, more computationally efficient full wave solvers, more reliable human models has to be introduced