Power and Interactive Information Transmission to Implanted Medical Device Using Ultrasonic

Suzuki, Satoshi; Kimura, Shunsuke; Katane, Tamotsu; Saotome, H.; Saito, Osami; Kobayashi, Kuriko

doi:10.1143/jjap.41.3600

Cited by 51 publications

(21 citation statements)

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“…18 A brief review of the limited and mostly experimental literature of UAET provides examples of proof-of-concept demonstrations. After the early work by Cochran et al 23,24 who suggested stimulation of osteogenesis by UAET, Kawanabe et al 25 and Suzuki et al 26 proposed methods for combined delivery of power and information to implanted medical devices. Recently, Ozeri and Shmilovitz 19 investigated an ultrasonic transcutaneous energy transfer method for powering implanted devices, numerically and experimentally.…”

mentioning

confidence: 99%

Ultrasonic power transfer from a spherical acoustic wave source to a free-free piezoelectric receiver: Modeling and experiment

Shahab

Gray

Ertürk

2015

Journal of Applied Physics

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Surface acoustic wave ultraviolet photodetectors using epitaxial ZnO multilayers grown on r -plane sapphireContactless powering of small electronic components has lately received growing attention for wireless applications in which battery replacement or tethered charging is undesired or simply impossible, and ambient energy harvesting is not a viable solution. As an alternative to wellstudied methods of contactless energy transfer, such as the inductive coupling method, the use of ultrasonic waves transmitted and received by piezoelectric devices enables larger power transmission distances, which is critical especially for deep-implanted electronic devices. Moreover, energy transfer by means of acoustic waves is well suited in situations where no electromagnetic fields are allowed. The limited literature of ultrasonic acoustic energy transfer is mainly centered on proofof-concept experiments demonstrating the feasibility of this method, lacking experimentally validated modeling efforts for the resulting multiphysics problem that couples the source and receiver dynamics with domain acoustics. In this work, we present fully coupled analytical, numerical, and experimental multiphysics investigations for ultrasonic acoustic energy transfer from a spherical wave source to a piezoelectric receiver bar that operates in the 33-mode of piezoelectricity. The fluid-loaded piezoelectric receiver under free-free mechanical boundary conditions is shunted to an electrical load for quantifying the electrical power output for a given acoustic source strength of the transmitter. The analytical acoustic-piezoelectric structure interaction modeling framework is validated experimentally, and the effects of system parameters are reported along with optimal electrical loading and frequency conditions of the receiver. V C 2015 AIP Publishing LLC.

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confidence: 99%

Ultrasonic power transfer from a spherical acoustic wave source to a free-free piezoelectric receiver: Modeling and experiment

Shahab

Gray

Ertürk

2015

Journal of Applied Physics

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“…Kawanabe et al (13) and Suzuki et al (14) refer to an ultrasound power delivery in a live goat, and present results on choice of frequency, efficiency, and temperature which we have generally validated. But their description is brief and lacking in experimental detail and presented data.…”

Section: 0 Introductionmentioning

confidence: 55%

“…Few published papers appeared on the subject through 2002 (13,14) although an early patent was granted (15). Kawanabe et al (13) and Suzuki et al (14) refer to an ultrasound power delivery in a live goat, and present results on choice of frequency, efficiency, and temperature which we have generally validated.…”

Section: 0 Introductionmentioning

confidence: 99%

In vivo demonstration of ultrasound power delivery to charge implanted medical devices via acute and survival porcine studies

Radziemski

Makin

2016

Ultrasonics

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Animal studies are an important step in proving the utility and safety of an ultrasound based implanted battery recharging system. To this end an Ultrasound Electrical Recharging System (USER™) was developed and tested. Experiments in vitro demonstrated power deliveries at the battery of up to 600 mW through 10 – 15 mm of tissue, 50 mW of power available at tissue depths of up to 50 mm, and the feasibility of using transducers bonded to titanium as used in medical implants. Acute in vivo studies in a porcine model were used to test reliability of power delivery, temperature excursions, and cooling techniques. The culminating five-week survival study involved repeated battery charging, a total of 10.5 hours of ultrasound exposure of the intervening living tissue, with an average RF input to electrical charging efficiency of 20%. This study was potentially the first long term cumulative living-tissue exposure using transcutaneous ultrasound power transmission to an implanted receiver in situ. Histology of the exposed tissue showed changes attributable primarily due to surgical implantation of the prototype device, and no damage due to the ultrasound exposure. The in vivo results are indicative of the potential safe delivery of ultrasound energy for a defined set of source conditions for charging batteries within implants.

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“…5. One design of the acoustic scheme is presented in [21]. A system-level design of the acoustic scheme for wireless powering of microoxygen generator implant is presented in [20], and it is claimed that the ultrasound-based power transfer scheme has lower power fluctuations caused by variations in alignment when compared with the near-field power transfer schemes.…”

Section: E Acoustic Schemementioning

confidence: 99%

“…Near-field inductive coupling [10]- [12], midfield resonant coupling [13], [14], near-field capacitive coupling [15], [16], far-field electromagnetic coupling [17]- [19], and acoustics [20], [21] are the various methods proposed to power implantable devices. Each method has its own merits and demerits as discussed in the following sections.…”

Section: Introductionmentioning

confidence: 99%

Enabling Wireless Powering and Telemetry for Peripheral Nerve Implants

Jegadeesan¹,

Nag²,

Agarwal

et al. 2015

IEEE J. Biomed. Health Inform.

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Neuromodulation of peripheral nerves with bioelectronic devices is a promising approach for treating a wide range of disorders. Wireless powering could enable long-term operation of these devices, but achieving high performance for miniaturized and deeply placed devices remains a technological challenge. We report the miniaturized integration of a wireless powering system in soft neuromodulation device (15 mm length, 2.7 mm diameter) and demonstrate high performance (about 10%) during in vivo wireless stimulation of the vagus nerve in a porcine animal model. The increased performance is enabled by the generation of a focused and circularly polarized field that enhances efficiency and provides immunity to polarization misalignment. These performance characteristics establish the clinical potential of wireless powering for emerging therapies based on neuromodulation.

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Power and Interactive Information Transmission to Implanted Medical Device Using Ultrasonic

Cited by 51 publications

References 1 publication

Ultrasonic power transfer from a spherical acoustic wave source to a free-free piezoelectric receiver: Modeling and experiment

Ultrasonic power transfer from a spherical acoustic wave source to a free-free piezoelectric receiver: Modeling and experiment

In vivo demonstration of ultrasound power delivery to charge implanted medical devices via acute and survival porcine studies

Enabling Wireless Powering and Telemetry for Peripheral Nerve Implants

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