A New Transcutaneous Energy Transmission System With Hybrid Energy Coils for Driving an Implantable Biventricular Assist Device | Zendy

Okamoto Eiji | Zendy; Yamamoto Yoshiro | Zendy; Akasaka Yuhta | Zendy; Motomura Tadashi | Zendy; Mitamura Yoshinori | Zendy; Nosé Yukihiko | Zendy

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A New Transcutaneous Energy Transmission System With Hybrid Energy Coils for Driving an Implantable Biventricular Assist Device

Author(s) -

Okamoto Eiji,

Yamamoto Yoshiro,

Akasaka Yuhta,

Motomura Tadashi,

Mitamura Yoshinori,

Nosé Yukihiko

Publication year - 2009

Publication title -

artificial organs

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.684

H-Index - 76

eISSN - 1525-1594

pISSN - 0160-564X

DOI - 10.1111/j.1525-1594.2009.00785.x

Subject(s) - electromagnetic coil , materials science , ferrite core , transmitter , transmission (telecommunications) , energy (signal processing) , electrical engineering , transmission system , electric power transmission , engineering , physics , channel (broadcasting) , quantum mechanics

We have developed a new transcutaneous energy transmission (TET) system for a totally implantable biventricular assist device (BVAD) system in the New Energy and Industrial Development Organization (NEDO) artificial heart project. The TET system mainly consists of an energy transmitter, a hybrid energy coil unit, an energy receiver, an internal battery system, and an optical telemetry system. The hybrid energy coil unit consists of an air‐core energy transmission coil and an energy‐receiving coil having a ferrite core. Internal units of the TET system are encapsulated in a titanium alloy casing, which has a size of 111 mm in width, 73 mm in length, and 25 mm in height. In in vitro experiments, the TET system can transmit a maximum electric energy of 60 Watts, and it has a maximum transmission efficiency of 87.3%. A maximum surface temperature of 46.1°C was measured at the ferrite core of the energy‐receiving coil during an energy transmission of 20 Watts in air. The long‐term performance test shows that the TET system has been able to operate stably for over 4 years with a decrease of energy‐transmission efficiency from 85% to 80%. In conclusion, the TET system with the hybrid energy coil can overcome the drawback of previously reported TET systems, and it promises to be the highest performance TET system in the world.

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