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Related Experiment Video

Updated: Jan 17, 2026

Subcutaneous Trigeminal Nerve Field Stimulation for Refractory Facial Pain
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Percutaneous Trigeminal Rhizotomy Using a Custom Electromagnetic Neuronavigation-Compatible Cannula: Technical Note

Omid Shoraka1, Jeffrey L Nadel1, Michael Bounajem1

  • 1Department of Neurosurgery, Clinical Neurosciences Center, University of Utah, Salt Lake City , Utah , USA.

Operative Neurosurgery (Hagerstown, Md.)
|September 23, 2025
PubMed
Summary
This summary is machine-generated.

A novel electromagnetic-guided cannula offers precise access for trigeminal neuralgia treatment. This technique reduces radiation exposure and operation time without compromising patient pain relief outcomes.

Keywords:
Electromagnetic neuronavigationFacial painPercutaneousRhizotomyTrigeminal neuralgia

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Area of Science:

  • Neurosurgery
  • Medical Devices
  • Pain Management

Background:

  • Trigeminal neuralgia causes severe facial pain.
  • Percutaneous procedures offer low-risk, immediate relief for trigeminal neuralgia.
  • Successful treatment relies on accurate access to the foramen ovale.

Purpose of the Study:

  • To evaluate a novel electromagnetic (EM)-guided cannula for percutaneous trigeminal rhizotomy.
  • To assess the accuracy and efficacy of EM navigation compared to traditional fluoroscopic guidance.

Main Methods:

  • Cadaveric study to assess cannula accuracy and EM neuronavigation compatibility.
  • Retrospective analysis of 61 patients undergoing percutaneous trigeminal rhizotomy (EM-guided vs. fluoroscopic guidance).
  • Outcomes measured included pain relief (Barrow Neurological Institute score) and recurrence.

Main Results:

  • 100% cannulation success rate with millimeter precision in cadaveric testing.
  • Significantly lower fluoroscopy exposure time with EM navigation (1.3 min vs. 7.0 min).
  • No significant difference in patient pain relief or recurrence between EM-guided and fluoroscopic techniques.

Conclusions:

  • The EM-guided cannula enables accurate and efficient trigeminal rhizotomy.
  • This novel technique reduces operation time and radiation exposure.
  • EM navigation is a safe and effective alternative for percutaneous trigeminal rhizotomy.