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Wireless Power Transfer Strategies for Implantable Bioelectronics.

Kush Agarwal, Rangarajan Jegadeesan, Yong-Xin Guo

IEEE Reviews in Biomedical Engineering

|March 23, 2017

Summary

Wireless power transfer (WPT) enables advanced neural implants for treating nervous system disorders. This review covers WPT technologies, implant applications, and safety considerations for future neurotech development.

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Area of Science:

Biomedical Engineering
Neurotechnology
Medical Devices

Background:

Neural implants offer effective treatments for nervous system disorders by interfacing with neural signals.
Completely implantable solutions are now commercially available, driven by technological advancements.
Wireless power transfer (WPT) is crucial for extended functionality of implantable medical devices (IMDs) in mobile patients.

Purpose of the Study:

To review various wireless power transfer (WPT) technologies for implantable applications.
To compare different WPT methods based on power budgets and transfer range.
To discuss safety concerns and future developments in wirelessly powered neural implants.

Main Methods:

Review of near-field resonant inductively coupled, capacitively coupled, ultrasonic, mid-field, and far-field WPT technologies.
Analysis of power requirements for specific implants (cochlear, retinal, cortical, peripheral).
Discussion of current IMD solutions and patient safety considerations.

Main Results:

WPT technologies enable long-term operation of neural implants, facilitating treatment of neurological disorders.
Comparison of WPT methods highlights trade-offs in power delivery and range.
Current IMD solutions and safety aspects are discussed in the context of WPT.

Conclusions:

Wireless power transfer is a key enabler for advanced, implantable neurotechnologies.
Future developments will focus on enhancing efficiency, integration, and safety of wirelessly powered IMDs.
Continued innovation in WPT is essential for expanding the therapeutic applications of neural implants.