Near-field wireless power transfer to stent-based biomedical implants

Wireless power transfer; Biological radiation effects; Biology; Circuit theory; Couplings; Energy transfer; Finite element method; Mathematical models; Microwave circuits; Muscle; Stents; Biomedical implants; Electromagnetics; Radio frequencies; Solid model; Inductive power transmission

Abstract :

[en] Safe wireless power transfer is an essential requirement for biomedical implants. Emerging technologies are becoming smaller, less invasive, and consume less power. Moreover, stent-based devices are being recognized as a minimally invasive alternative to traditional surgery. Hence, the idea of using the body of the stent as the power receiving element is becoming increasingly attractive. The objective of this paper is to analyze two near-field wireless power transfer methods to stent-based devices, viz., inductive and capacitive coupling. The methods used are lumped element modeling, ac circuit theory, finite-element analysis, experiments with excised bovine muscle tissue, and a live ovine vascular model. Capacitive coupling is proposed as an alternate method due to the transmitter design that can be worn anywhere on the body. It achieves power transfer efficiencies of 2.6% and 1% when placed at depths in muscle tissue of 15 mm and 30 mm, respectively. Safety requirements are also met. The capacitive link can accept an input power of 53 mW before exceeding the safe specific absorption rate limit of 1.6 W/kg averaged over 1 g of tissue. © 2018 IEEE.

Disciplines :

Electrical & electronics engineering

Author, co-author :

Aldaoud, A.; Department of Physics, University of Melbourne, Parkville, VIC 3010, Australia

Redouté, Jean-Michel ; Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Systèmes microélectroniques intégrés

Ganesan, K.; Department of Physics, University of Melbourne, Parkville, VIC 3010, Australia

Rind, G. S.; Vascular Bionics Laboratory, Departments of Medicine, Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, VIC 3205, Australia, Synchron Australia, Melbourne, VIC 3205, Australia

John, S. E.; Vascular Bionics Laboratory, Departments of Medicine, Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, VIC 3205, Australia, Synchron Australia, Melbourne, VIC 3205, Australia

Ronayne, S. M.; Vascular Bionics Laboratory, Departments of Medicine, Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, VIC 3205, Australia, Synchron Australia, Melbourne, VIC 3205, Australia

Opie, N. L.; Vascular Bionics Laboratory, Departments of Medicine, Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, VIC 3205, Australia, Synchron Australia, Melbourne, VIC 3205, Australia

Garrett, D. J.; Department of Physics, University of Melbourne, Parkville, VIC 3010, Australia

Prawer, S.; Department of Physics, University of Melbourne, Parkville, VIC 3010, Australia

Language :

English

Title :

Near-field wireless power transfer to stent-based biomedical implants

Publication date :

2018

Journal title :

IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology

ISSN :

2469-7249

Publisher :

Institute of Electrical and Electronics Engineers Inc.

Volume :

Issue :

Pages :

193-200

Peer reviewed :

Peer reviewed

Available on ORBi :

since 06 September 2019

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