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Related Experiment Video

Updated: Sep 11, 2025

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Battery-Free Dual-Channel Wireless Neurostimulator Using Passive Circuitry for Neuropathic Pain Modulation.

Jeongju Moon1, Kyungmo Seong1, Hyeon Gyu Kim1

  • 1Department of Electronics Engineering, College of Engineering, Pusan National University, Busan, 46241, Republic of Korea.

Advanced Healthcare Materials
|August 13, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a miniaturized wireless stimulator for neuropathic pain. This passive device offers a less invasive alternative to current neuromodulation techniques, significantly alleviating pain in a rat model.

Keywords:
multichannel stimulationmultiscale modelingneuromodulationpassive circuit componentswireless neural stimulator

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Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Medical Devices

Background:

  • Neuropathic pain is a complex condition with significant individual and societal burden.
  • Pharmacological treatments are often ineffective for neuropathic pain.
  • Current neuromodulation techniques require bulky implanted devices with complex circuitry.

Purpose of the Study:

  • To develop a miniaturized, wireless, passive dual-channel stimulator for neuromodulation.
  • To enable multichannel stimulation with a single receiver coil.
  • To advance the miniaturization of neurostimulators for improved patient outcomes.

Main Methods:

  • Development of a miniaturized passive circuit stimulator (9 × 13 × 3.4 mm³, 0.451 g).
  • Utilized a wireless electroceutical approach with a single receiver coil and tapping inductor.
  • Implantation into a spared nerve injury rat model to stimulate the primary motor cortex.

Main Results:

  • The passive stimulator successfully generated stimulus pulses for each channel.
  • Behavioral assessments demonstrated significant pain alleviation in the rat model.
  • Independent channel stimulation proved effective in reducing pain responses.

Conclusions:

  • The developed wireless electroceutical approach enables miniaturized multichannel neurostimulation.
  • This innovation enhances patient comfort and reduces potential surgical complications.
  • The study advances passive neurostimulator technology for treating neuropathic pain.