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Related Experiment Video

Updated: May 9, 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 wirelessly powered electro-acupuncture based on adaptive pulsewidth monophase stimulation.

Kiseok Song, Long Yan, Seulki Lee

    IEEE Transactions on Biomedical Circuits and Systems
    |July 16, 2013
    PubMed
    Summary
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    This study presents a wireless electro-acupuncture system for convenient medical treatments. The system uses adaptive pulsewidth stimulation and wireless power, enhancing patient comfort and therapeutic benefits.

    Area of Science:

    • Biomedical Engineering
    • Medical Devices
    • Wearable Technology

    Background:

    • Traditional electro-acupuncture (EA) systems require cumbersome wires, limiting patient mobility and convenience.
    • Developing wireless, minimally invasive medical devices is crucial for improving patient care and therapeutic outcomes.

    Purpose of the Study:

    • To develop a wirelessly powered electro-acupuncture (EA) system with adaptive pulsewidth (APW) monophase stimulation for enhanced patient convenience and therapeutic efficacy.
    • To design an ultra-low-power stimulator integrated circuit (IC) for needle-attachable EA nodes, enabling wireless power transfer and precise stimulation control.

    Main Methods:

    • An ultra-low-power stimulator IC was integrated onto a flexible-printed-circuit board (F-PCB) and attached to needle electrodes.
    • A conductive yarn helical antenna facilitated wireless power reception (433 MHz) from an EA controller, with a zero-Vth nMOS rectifier achieving 1.0 V supply.

    Related Experiment Videos

    Last Updated: May 9, 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

  • The APW stimulator IC compensated for body impedance variations (100-200 kΩ) to ensure constant charge injection (80 nC/stimulation), while alternate monophase (AMP) fashion ensured patient safety by neutralizing injected charge.

    • Main Results:

    • The wireless EA system successfully delivered power wirelessly with minimal loss (6 dB) and achieved 32% rectifier efficiency.
    • The APW stimulator IC maintained constant charge injection despite significant body impedance variations.
    • The system demonstrated safe operation through charge neutralization via AMP fashion, verified on a pork model.

    Conclusions:

    • The developed wirelessly powered EA system offers a convenient and effective solution for invasive medicine, improving patient comfort without compromising therapeutic value.
    • This technology has the potential to advance minimally invasive medical treatments by eliminating the need for wired connections.