Brief Communication

Journal of Artificial Organs

, Volume 11, Issue 4, pp 238-240

Improvement in magnetic field immunity of externally-coupled transcutaneous energy transmission system for a totally implantable artificial heart

  • Takahiko YamamotoAffiliated withGraduate School of Science and Technology, Tokyo University of Science Email author 
  • , Kohji KoshijiAffiliated withGraduate School of Science and Technology, Tokyo University of Science
  • , Akihiko HommaAffiliated withAdvanced Medical Engineering Center, National Cardiovascular Center, Research Institute
  • , Eisuke TatsumiAffiliated withAdvanced Medical Engineering Center, National Cardiovascular Center, Research Institute
  • , Yoshiyuki TaenakaAffiliated withAdvanced Medical Engineering Center, National Cardiovascular Center, Research Institute

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access

Abstract

Transcutaneous energy transmission (TET) that uses electromagnetic induction between the external and internal coils of a transformer is the most promising method to supply driving energy to a totally implantable artificial heart without invasion. Induction-heating (IH) cookers generate magnetic flux, and if a cooker is operated near a transcutaneous transformer, the magnetic flux generated will link with the external and internal coils of the transcutaneous transformer. This will affect the performance of the TET and the artificial heart system. Hence, it is necessary to improve the magnetic field immunity of the TET system. During operation of the system, if the transcutaneous transformer is in close proximity to an IH cooker, the electric power generated by the cooker and coupled to the transformer can drive the artificial heart system. To prevent this coupling, the external coil was shielded with a conductive shield that had a slit in it. This reduces the coupling between the transformer and the magnetic field generated by the induction cooker. However, the temperature of the shield increased due to heating by eddy currents. The temperature of the shield can be reduced by separating the IH cooker and the shield.

Key words

Artificial heart Transcutaneous energy transmission Electromagnetic compatibility Magnetic field immunity Shield