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Related Experiment Video

Updated: Jun 17, 2026

Implantation and Control of Wireless, Battery-free Systems for Peripheral Nerve Interfacing
07:13

Implantation and Control of Wireless, Battery-free Systems for Peripheral Nerve Interfacing

Published on: October 20, 2021

Toward a fully wireless endovascular neural interface: Evaluating power transfer efficacy.

Yi-De Tai1, Joel Villalobos1, Nima Wickramasinghe1

  • 1Department of Biomedical Engineering, The University of Melbourne, Melbourne, Parkville, Australia.

Plos One
|June 15, 2026
PubMed
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Wireless power transfer for endovascular neural interfaces (ENIs) was achieved using inductive coils, eliminating transvascular wires. This innovation enhances safety and reliability for minimally invasive brain implants.

Area of Science:

  • Biomedical Engineering
  • Neurotechnology
  • Wireless Power Transfer

Background:

  • Endovascular neural interfaces (ENIs) offer minimally invasive neural stimulation and recording.
  • Current ENIs require transvascular wires, posing risks like infection and thrombosis.
  • Eliminating wires necessitates efficient wireless power transfer across the skull within safety limits.

Purpose of the Study:

  • To design and evaluate endovascular receiver (Rx) and transmitter (Tx) coils for maximized wireless power transfer.
  • To optimize power delivery within endovascular geometric and biological constraints.
  • To address the challenge of efficient power transfer across the skull for ENIs.

Main Methods:

  • Computational modeling, benchtop, and in-vivo testing were used.

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A Wireless, Bidirectional Interface for In Vivo Recording and Stimulation of Neural Activity in Freely Behaving Rats
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A Wireless, Bidirectional Interface for In Vivo Recording and Stimulation of Neural Activity in Freely Behaving Rats

Published on: November 7, 2017

Related Experiment Videos

Last Updated: Jun 17, 2026

Implantation and Control of Wireless, Battery-free Systems for Peripheral Nerve Interfacing
07:13

Implantation and Control of Wireless, Battery-free Systems for Peripheral Nerve Interfacing

Published on: October 20, 2021

A Wireless, Bidirectional Interface for In Vivo Recording and Stimulation of Neural Activity in Freely Behaving Rats
10:41

A Wireless, Bidirectional Interface for In Vivo Recording and Stimulation of Neural Activity in Freely Behaving Rats

Published on: November 7, 2017

  • Evaluated optimal frequencies, coupling, coil quality factors, power transfer efficiency (PTE), and specific absorption rate (SAR).
  • Assessed coil performance with and without ferrites, in air, sheep tissue, and in vivo, testing tolerance to misalignment and load mismatch.

    • Main Results:

    • Inductive power transfer successfully delivered power to endovascular devices at clinically relevant depths.
    • Maximum PTE reached 11% at 15 mm and 2% at 30 mm.
    • Up to 72 mW was delivered at 30 mm within SAR limits; ferrite-core coils were superior beyond 20 mm and more tolerant to misalignment.

    Conclusions:

    • Demonstrated feasibility of wirelessly powering multichannel ENIs using implantable inductive coils.
    • Wireless power transfer can significantly improve the safety and reliability of endovascular neural interfaces.
    • This technology has the potential to transform neural interfacing by removing transvascular wires.