Magnetic-Field Immunity Examination and Evaluation of Transcutaneous Energy-Transmission System for a Totally Implantable Artificial Heart

Abstract

Transcutaneous energy transmission (TET) is the most promising noninvasive method for supplying driving energy to a totally implantable artificial heart. Induction-heating (IH) cookers generate a magnetic flux, and if a cooker is operated near a transcutaneous transformer, the magnetic flux generated will link with its external and internal coils. This will affect the performance of the TET and the artificial heart system. In this paper, we present the design and development of a coil to be used for a magnetic immunity test, and we detail the investigation of the magnetic immunity of a transcutaneous transformer. The experimental coil, with five turns like a solenoid, was able to generate a uniform magnetic field in the necessary bandwidth. A magnetic-field immunity examination of the TET system was performed using this coil, and the system was confirmed to have sufficient immunity to the magnetic field generated as a result of the conventional operation of induction-heating cooker.

Optimized and standardized circular-coil systems for homogeneous magnetic field generation

“…Further, given the definition of the field inhomogeneity η, it is indicated that η will be determined by r/s, d 1 /s, d 2 /s and N 1 /N 2 . Meanwhile, (7) and (8) indicate that for a certain η, the total ampere-turns NI should be normalized by the product of s and B min .…”

Ventricular Assist Devices (VAD) Therapy: New Technology, New Hope?

“…32 The fundamental mechanism of energy formation is an induction-heating (IH) system, which creates an electromagnetic charge between two sets of coils located inside and outside the body. 33 Certain low-energy requiring devices, such as pacemakers and defibrillators, have already incorporated this technology. However, reports of electromagnetic interference with household devices have been documented.…”

Development of test fixture for measurement of dielectric properties and its verification using animal tissues

“…The examination of the electromagnetic compatibility (EMC) of implantable or wearable medical electric equipment should be conducted at the location of a living body where the apparatus is to be used (Fenical 1994, Silberberg 2001, Baisakhiya et al 2003, Yamamoto et al 2008, Yamamoto and Koshiji 2012, Yambe et al 1998, Chen and Rodriguez-Villegas 2010, Wieringen et al 2008. In many countries, however, the medical testing of EMCs is highly regulated, and the use of human subjects may conflict with the Declaration of Helsinki or other bioethical agreements (Krouk et al 2008).…”