The power of sound: miniaturized medical implants with ultrasonic links

Max L. Wang; Ting Chia Chang; Jayant  Charthad; Marcus J. Weber; Amin Arbabian

doi:10.1117/12.2263877

18 May 2017 The power of sound: miniaturized medical implants with ultrasonic links

Max L. Wang; Ting Chia Chang; Jayant Charthad; Marcus J. Weber; Amin Arbabian

Author Affiliations +

Proceedings Volume 10194, Micro- and Nanotechnology Sensors, Systems, and Applications IX; 101940Y (2017) https://doi.org/10.1117/12.2263877
Event: SPIE Defense + Security, 2017, Anaheim, California, United States

Abstract

Miniaturized wirelessly powered implants capable of operating and communicating deep in the body are necessary for the next-generation of diagnostics and therapeutics. A major challenge in developing these minimally invasive implants is the tradeoff between device size, functionality, and operating depth. Here, we review two different wireless powering methods, inductive and ultrasonic power transfer, examine how to analyze their power transfer efficiency, and evaluate their potential for powering implantable medical devices. In particular, we show how ultrasonic wireless power transfer can address these challenges due to its safety, low attenuation, and millimeter wavelengths in the body. Finally, we demonstrate two ultrasonically powered implants capable of active power harvesting and bidirectional communication for closed-loop operation while functioning through multiple centimeters of tissue.

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Max L. Wang, Max L. Wang, Ting Chia Chang, Ting Chia Chang, Jayant Charthad, Jayant Charthad, Marcus J. Weber, Marcus J. Weber, Amin Arbabian, Amin Arbabian, } "The power of sound: miniaturized medical implants with ultrasonic links", Proc. SPIE 10194, Micro- and Nanotechnology Sensors, Systems, and Applications IX, 101940Y (18 May 2017); doi: 10.1117/12.2263877; https://doi.org/10.1117/12.2263877

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