Numerical Modeling of Heating of Multilayer Biological Tissue by Inductive Energy Transfer System for Various Layer Structures

摘要

The heating of surrounding tissues is one of the main problems during the operation of implantable medical devices with an inductive energy transfer. The paper is devoted to the numerical simulation of tissues heating with elements of an inductive powering unit for the battery-less implant with a power consumption of 500 mW. A four-layer skin-fat-fascia-muscle environment was considered. The evaluation of tissue heating was carried out for different layer structures, as well as at different relative positions of the receiving coil and the electronics unit. It was found that the peak heating of surrounding tissues lies between 0.7...1.5°C depending on the thickness of the layer. The lower heating corresponds to the minimal values of the fat layer thickness.