抄録
This paper reports on the analysis of electric field intensity radiated from a ventricular assist device (VAD). We constructed two types of models (i.e., a VAD model without a human and one with a human) in an electromagnetic simulator (SEMCAD-X). The VAD model without a human (Model 1) consisted of the external controller, a couple of wires, and the VAD actuator in a tank (27 cm x 27 cm x 10 cm) filled with physiological saline. The VAD model with a human (Model 2) consisted of Model 1, plus the addition of a cylinder 40 cm diameter and 172 cm high (e.g., 100 MHz : relative permittivity: 66, conductivity: 0.7). This cylinder simulated a muscle in the human body. During the simulation, the maximum electric field intensity (E) to a distance three meters from these models was analysed from 30 MHz to 200 MHz. When the frequency was 30 MHz, E of model 1 was larger than E of model 2 by 1.6 dBμV/m. Therefore, there is a possibility that the human body absorbs electromagnetic waves and reduces the electric field intensity.
